Types for Utility Purposes – Global Mapper

The following types serve general utility roles and in miscellaneous functions not part of the other categories. These types use fixed, numeric constants, which are defined here.

globalmapper.GM_ChildLayerOp_t8

This type represents operations on a child layer

Values:

GM_ChildLayerOp_Load = 0: The child layer was just loaded
GM_ChildLayerOp_Close = 1: The child layer was just closed
GM_ChildLayerOp_DrawScaleChosen = 2: The draw scale for an online layer was chosen. Event data is sint32* with zoom scale number
GM_ChildLayerOp_ExportScaleChosen = 3: The export scale for an online layer was chosen. Event data is sint32* with zoom scale number
GM_ChildLayerOp_LocalTileMissing = 4: The tile for a local tile data set was missing. Event data is str with filename that was missing

globalmapper.GM_DatumXForm_t32

This type represents the different available datum transformation methods

Values:

GM_Datum_Molodensky = 0: 3-parameter Molodensky datum transformation
GM_Datum_BursaWolfe = 1: 7-parameter Bursa-Wolfe datum transformation

GM_Datum_NumXFormMethods = 2

globalmapper.GM_Error_t32

Error codes

Values:

GM_Error_None = 0

GM_Error_InvalidLayer = 1: The provided layer is not open
GM_Error_InvalidParam = 2: A parameter was invalid
GM_Error_LoadError = 3: Unable to load layer
GM_Error_MultipleLayers = 4: Multiple layers were found in the file being loaded (call GM_LoadLayerList instead)
GM_Error_CollarSetup = 5: Unable to automatically crop the collar
GM_Error_DrawError = 6: An unknown error occurred drawing the layer(s)
GM_Error_ExportError = 7: An unknown error occurred exporting the layer(s)
GM_Error_NothingToExport = 8: No data was available to export
GM_Error_InvalidFormat = 9: An invalid export format was specified
GM_Error_RectifyError = 10: An error occurred rectifying the image
GM_Error_NotSupported = 11: The operation is not supported for the layer
GM_Error_NotRegistered = 12: No registry key was found to enable this functionality
GM_Error_NoDataAtLocation = 13: No data was found at the specified location
GM_Error_OutOfMemory = 14: Not enough memory to complete the requested operation
GM_Error_Projection = 15: An error occurred projecting a coordinate
GM_Error_NoProjectionSet = 16: No view/export projection is currently set
GM_Error_ViewShedCalc = 17: An error occurred performing the Viewshed analysis
GM_Error_OperationCanceled = 18: The user canceled the operation
GM_Error_OnlineConnect = 19: A connection to the online service could not be established
GM_Error_OnlineUnknownSource = 20: No online source with the theme name provided could be found
GM_Error_GenerateContours = 21: An error occurred generating the contours
GM_Error_NotRasterLayer = 22: The layer provided is not a raster or elevation layer
GM_Error_InvalidPackage = 23: The provided handle is not a valid package
GM_Error_InvalidFeatureIndex = 24: There was no feature at the given index in the layer
GM_Error_InvalidDrawStyle = 25: The drawing style passed in is not valid
GM_Error_InvalidSymbolName = 26: The symbol name provided does not match any available point symbols
GM_Error_SymbolAlreadyCreated = 27: The symbol name specified has already been added
GM_Error_MissingFile = 28: The file specified could not be found
GM_Error_GPSDataNotValid = 29: The GPS data requested does not currently have a valid value available
GM_Error_GPSAlreadyTracking = 30: A GPS device is already being tracked, call GM_GPSStopTracking
GM_Error_VolumeCalcFailed = 31: An error occurred calculating the volume
GM_Error_InvalidHoleIndex = 32: The area does not have a hole at the index provided
GM_Error_InvalidMapIndex = 33: There is no map at the given index in the map catalog
GM_Error_3DNotOpen = 34: No 3D view window is currently open
GM_Error_3DLibraryNotFound = 35: The ExternalViewerIntf.dll library was not found
GM_Error_3DLibraryBadInterface = 36: The ExternalViewerIntf.dll library did not have the proper interface
GM_Error_3DCreateError = 37: Unexpected error creating 3D view
GM_Error_3DSetViewError = 38: Unexpected error setting 3D view
GM_Error_NothingFound = 39: No features were found within the search area
GM_Error_SearchError = 40: Unexpected search error
GM_Error_LowMemory = 41: Some data was not drawn or loaded due to low available memory
GM_Error_NotElevationLayer = 42: The layer provided is not an elevation layer
GM_Error_FileAlreadyInCatalog = 43: The provided file was already in the map catalog to which it was being added.
GM_Error_TypeAlreadyExists = 44: The provided type name was already used by an existing type
GM_Error_DatumAlreadyExists = 45: A built-in datum with the given name already exists
GM_Error_UnknownEllipsoid = 46: The ellipsoid name provided does not match a known ellipsoid
GM_Error_GridError = 47: Error generating grid from 3D vector data
GM_Error_InvalidShaderName = 48: The shader name provided was not found
GM_Error_SymbolNotCustom = 49: The symbol name provided is not a custom one that can be deleted
GM_Error_MGRSParseError = 50: Error parsing MGRS coordinate string
GM_Error_CreateBufferError = 51: Error creating a buffer around a feature
GM_Error_CopyrightedData = 52: The data attempting to be exported or fetched is copyrighted
GM_Error_BrushAlreadyCreated = 53: A fill style with the provided name already exists
GM_Error_BrushError = 54: An error was encountered adding the custom fill brush
GM_Error_EllipsoidAlreadyExists = 55: An ellipsoid with the given name already exists
GM_Error_CombineError = 56: An error occurred combining the areas
GM_Error_SkippedEmpty = 57: Empty tile was skipped on export due to passing GM_ExportFlags_SkipEmpty
GM_Error_NoFeatureElev = 58: The feature does not have a single elevation value (for lines and areas there may be per-vertex values)
GM_Error_ArcGISNotLicensed = 59: Attempted to load an ArcGIS database, but there is no license for ArcGIS
GM_Error_NotSupportedIn64BitBuild = 60: Attempted to use functionality that is not supported in a 64-bit build
GM_Error_UnableToConnectToDB = 61: Unable to connect to the database using the input connection string
GM_Error_Unspecified = 62: Generic unspecified error
GM_Error_Script = 63: Error running script
GM_Error_InvalidLidarPointIdx = 64: The Lidar point index is out of range
GM_Error_NothingChanged = 65: Nothing was changed by the modification
GM_Error_NotPaletteLayer = 66: The layer is not a palette-based layer
GM_Error_NotImageLayer = 67: The layer does not contain color imagery
GM_Error_InvalidBand = 68: The provided band was outside the range of bands for the layer
GM_Error_NoElevationLayersLoaded = 69: There are no elevation layers currently loaded
GM_Error_NoVectorLayersLoaded = 70: There are no vector layers currently loaded
GM_Error_COAST = 71: Unspecified COAST processing error
GM_Error_NoCOASTModelParmsLoaded = 72: No model parameter file is loaded
GM_Error_RegistryOpFailed = 73: Error while reading or writing the registry
GM_Error_InvalidCodePage = 74: The code page provided is not known
GM_Error_InvalidLidarQuery = 75: The Lidar query that you passed in is not an active one
GM_Error_LidarPointInQuery = 76: The Lidar point was already in the Lidar query
GM_Error_LidarPointNotInQuery = 77: The Lidar point was not found in the Lidar query
GM_Error_GenAreas = 78: An error occurred generating areas from equal values
GM_Error_DownloadFailed = 79: A file download failed
GM_Error_ExportFileAlreadyExists = 80: The specified export file already exists, and the option to allow overwrite was not specified
GM_Error_DeleteFailed = 81: The specified export file could not be deleted.
GM_Error_DatabaseCreationFailed = 82: The attempt to create a database file failed.
GM_Error_SpatialOperationsError = 83: The attempt to perform a spatial operation failed
GM_Error_LidarOpFailed = 84: A Lidar operation (classify, extract, etc.) failed
GM_Error_NoChangesFound = 85: No changes were found in operation (like LidarCompare)
GM_Error_PixelsToPoints = 86: A Pixels-to-Points operation failed
GM_Error_NonEditable = 87: The provided data is not editable
GM_Error_HoleNotInParent = 88: The provided hole geometry was not contained within the parent
GM_Error_InvalidLayerName = 89: The provided layer name is invalid (null or “”)
GM_Error_PositionOutOfBound = 90: The provided location is outside of the expected bounds
GM_Error_FileError = 91: There was an error performing some kind of file operation, like file copy or move

GM_Error_NumCodes = 91

GM_Error_NotImplemented = 0xFFFF: The given function hasn’t been implemented yet

Old errors renamed for backward compatibility

GM_Error_TerraServerConnect = 19
A connection to the TerraService could not be established

GM_Error_TerraServerBadTheme = 20
No TerraServer theme with the theme name provided could be found

globalmapper.GM_Event_t

All the types of events that might occur in globalmapper

Values:

GM_Event_3DSizesChanged = 1: Sent whenever the texture or terrain size for the 3D view changes
GM_Event_AreaGroupChanged = 2: Sent whenever the group ID of an area is changed (data is FeatureArea*)
GM_Event_AreaTypeRemoved = 3: Sent whenever an area type is removed.
GM_Event_BackgroundColorChanged = 4: Sent whenever the background color changes
GM_Event_BatchExportFinished = 5: A batch or gridded (tiled) export has completed (data is BatchExportInfo_t*)
GM_Event_BatchExportStarted = 6: A batch or gridded (tiled) export was started (data is BatchExportInfo_t*)
GM_Event_ChildDrawCompleted = 7: Send whenever the draw of a child overlay completes (data is EventData_ChildDrawCompleted_t*)
GM_Event_CustomAreaStyleRemoved = 8: Sent whenever a custom area style is removed
GM_Event_CustomSymbolRemoved = 9: Sent whenever a custom symbol is removed
GM_Event_DefaultAreaStyleChanged = 10: Sent whenever the default style for an area type is changed (data is AreaFeatureClass_t16)
GM_Event_DefaultLineStyleChanged = 11: Sent whenever the default style for a line type is changed (data is LineFeatureClass_t16)
GM_Event_DefaultPointStyleChanged = 12: Sent whenever the default style for a line type is changed (data is PointFeatureClass_t16)
GM_Event_DrawDisable = 13: Sent whenever we want to disable draws
GM_Event_DrawEnable = 14: Sent whenever we want to re-enable draws
GM_Event_DrawScaleChanged = 15: Sent each time the GraphicsObject draw scale changed.
GM_Event_ExportBoundsChanged = 16: Sent whenever the export bounds of a layer changes (like when cropping is changed)
GM_Event_FeatureAdded = 17: Sent whenever a new feature is added to an existing layer (item data is Feature* that was added)
GM_Event_FeatureClassificationChanged = 18: Sent whenever the classification of a feature is changed (item data is Feature* that was changed)
GM_Event_FeatureDeleted = 19: Sent whenever features are marked as deleted (item data is Feature*)
GM_Event_FeaturesMoved = 20: Sent whenever features are moved (item data is GM_EventData_FeaturesMoved_t*)
GM_Event_FeatureStyleChanged = 21: Sent whenever the drawing style of a feature is changed (item data is Feature* that was changed)
GM_Event_FileLoadRequested = 22: Sent to request load of a file (item data is CString*)
GM_Event_FirstDraw = 23: Sent when the first draw is done
GM_Event_GlobalProjChanged = 24: Sent each time the global projection is changed. The data is the old global projection.
GM_Event_GridDisplayChanged = 25: Sent whenever the current grid display type is changed
GM_Event_LayerStyleChanged = 26: Sent whenever a layer area style or line style is changed
GM_Event_LicenseDongleLost = 27: Sent whenever a HASP dongle license is lost
GM_Event_LicenseNetworkLost = 28: Sent whenever a network license is lost
GM_Event_LicenseStatusChanged = 29: Sent whenever the license status changes (event data is ViewerConfig::ModuleType_t)
GM_Event_LineTypeRemoved = 30: Sent whenever a line type is removed.
GM_Event_MapViewChanged = 31: Sent whenever the coordinates in a map view change. The item data is a pointer to the view control object.
GM_Event_MapViewUpdateNeeded = 32: Sent whenever the map view needs to be updated
GM_Event_ModelessDialogClosing = 33: Sent whenever a modeless dialog is closed. The data is a pointer to the modeless dialog.
GM_Event_MultiCloseStarted = 34: Sent whenever a multi-close operation starts
GM_Event_MultiCloseStopped = 35: Sent whenever a multi-close operation completes
GM_Event_MultiLoadStarted = 36: Sent whenever a multi-load operation starts
GM_Event_MultiLoadStopped = 37: Sent whenever a multi-load operation completes. Data is GM_MultiLoadStateFlags_t32.
GM_Event_OverlayBoundsChanged = 38: Sent whenever the bounding box of an overlay changes
GM_Event_OverlayClosed = 39: Sent just after an overlay is closed and removed from the document’s overlay factory. gm.NULL for top-level layers, non-zero for child layers. The pointer for child layers will be to the parent layer.
GM_Event_OverlayClosing = 40: Sent each time an overlay is closed from the document’s overlay factory. The data is a GeographicOverlay*
GM_Event_OverlayLoaded = 41: Sent each time a new overlay is loaded into the document’s overlay factory. The data is a GeographicOverlay*
GM_Event_OverlayOrderChangeFinished = 42: The movement of an overlay in the overlay list has finished
GM_Event_OverlayOrderChangeStarted = 43: The movement of an overlay in the overlay list has started
GM_Event_OverlayOptionsChanged = 44: Changed when any options that affect how an overlay is rendered are changed. The data is OverlayList_t* that changed.
GM_Event_PathProfileFromPosChanged = 45: Sent whenever the from position of the current path profile is changed via a popup menu
GM_Event_PathProfileToPosChanged = 46: Sent whenever the to position of the current path profile is changed via a popup menu
GM_Event_PixelScanStart = 47: Called when a pixel scan starts
GM_Event_PixelScanStop = 48: Called when a pixel scan stops
GM_Event_PointTypeRemoved = 49: Sent when a point type is removed.
GM_Event_PosFormatChanged = 50: The arc degrees display format has changed.
GM_Event_PostDrawNeeded = 51: Draw on top of main map view is need. The data is a pointer to a CDC.
GM_Event_RasterExportFinished = 52: A raster export has finished.
GM_Event_RasterExportStarted = 53: A raster export has started. The data is a pointer to a RasterExportInfo_t structure.
GM_Event_RenderStart = 54: Sent when a render operation starts
GM_Event_RenderStop = 55: Sent when a render operation is finished
GM_Event_RenderStart3D = 56: Sent when a 3D render starts
GM_Event_RenderStop3D = 57: Sent when a 3D render is finished
GM_Event_RenderStartVector = 58: Sent when a vector render starts
GM_Event_RenderStopVector = 59: Sent when a vector render is finished
GM_Event_ScaleUnitsChanged = 60: Sent whenever the scale units are changed
GM_Event_ScriptFinished = 61: Sent whenever a script finishes processing
GM_Event_ScriptStarted = 62: Sent whenever a script starts processing
GM_Event_ShadersChanged = 63: Sent whenever the available shaders change.
GM_Event_SharedRasterStatsChanged = 64: Sent whenever the shared raster stats for auto-contrast changes
GM_Event_SpeedUnitsChanged = 65: Sent whenever the speed units change.
GM_Event_TileDownloadFailed = 66: Sent whenever a tile download failed for an online source. (The data is a bool* that is a cancel flag. Set to true if the entire operation should be cancelled)
GM_Event_VectorDisplayOptionsChanged = 67: Sent whenever a vector display option changes.
GM_Event_VectorExportFinished = 68: A vector export has finished.
GM_Event_VectorExportStarted = 69: A vector export has started. The data is a pointer to a VectorExportInfo_t structure.
GM_Event_VectorTypeFiltersChanged = 70: Sent whenever the vector type filter settings change
GM_Event_ViewBitmapInvalidated = 71: Sent whenever the view background bitmap is marked as invalid prior to a redraw.
GM_Event_MinMaxElevRangeChanged = 72: Sent whenever the min/max elevation range changes
GM_Event_LidarDisplayOptionsChanged = 73: Sent whenever a global Lidar display option changes.
GM_Event_ChildLoadCompleted = 74: Send whenever the load of a child overlay compelte (data is GeographicOverlay*)
GM_Event_ProfileCorridorWidthChanged = 75: Send whenever the corridor width on a path profile changes (data is double* with new corridor width in meters)
GM_Event_OnIdleHandled = 76: Send whenever an OnIdle message happens in the main application. Use to control control state in modeless dialogs.
GM_Event_MouseLButtonDown = 77: Sent when the Windows LButtonDown message is received (data is GM_MouseEventInfo_t*)
GM_Event_MouseLButtonUp = 78: Sent when the Windows LButtonUp message is received (data is GM_MouseEventInfo_t*)
GM_Event_MouseLButtonDoubleClick = 79: Sent when the Windows LButtonDblClick message is received (data is GM_MouseEventInfo_t*)
GM_Event_MouseRButtonDown = 80: Sent when the Windows RButtonDown message is received (data is GM_MouseEventInfo_t*)
GM_Event_MouseRButtonUp = 81: Sent when the Windows RButtonDown message is received (data is GM_MouseEventInfo_t*)
GM_Event_MouseRButtonDoubleClick = 82: Sent when the Windows RButtonDown message is received (data is GM_MouseEventInfo_t*)
GM_Event_StartDrawFeature = 83: Sent when the user starts to draw a line, area, or point feature (data is GM_DrawFeatureType*)
GM_Event_AddFeatureVertex = 84: Sent when the user adds a vertex to a line, area, or point (data is GM_Point3D_t*)
GM_Event_CompleteDrawFeature = 85: Sent when the completes the line, area, or point feature (data is Feature*)
GM_Event_LidarClassificationChanged = 86: Sent whenever the classifications of Lidar points changed. Data is LidarPointCloud_t*
GM_Event_LidarPointsDeleted = 87: Sent whenever the Lidar points are deleted. Data is LidarPointCloud_t*
GM_Event_ExtensionActivated = 88: Sent to an extension when it is activated.
GM_Event_ExtensionDeactivated = 89: Sent to an extension when it is deactivated.
GM_Event_FeatureSelectionChanged = 90: Sent when the selection status of a feature changes (data is Feature* that was changed)
GM_Event_SelectionCleared = 91: Sent when all selected features have been cleared (data is VectorOverlayList_t* of layers that were changed)
GM_Event_OnlineDrawScaleSet = 92: Sent when the draw scale for an online layer was set (data is GM_OnlineEventInfo_t*)
GM_Event_OnlineExportScaleSet = 93: Sent when the export scale for an online layer was set (data is GM_OnlineEventInfo_t*)
GM_Event_LocalTileMissing = 94: Sent whenever a file from a local tile set is missing (data is GM_OnlineEventInfo_t*)
GM_Event_LicenseNetworkRestored = 95: Sent whenever the connection to the network license server is restored.
GM_Event_ShowErrorMessage = 96: Sent whenever an error message, possibly from a background thread, needs displayed
GM_Event_MouseMove = 97: Sent when the Windows MouseMove message is received (data is GM_MouseMoveInfo_t*)
GM_Event_LicenseInvalid = 98: Sent when a node-locked license is determined to be invalid (data is ViewerConfig::ModuleType_t)
GM_Event_3DSetActiveTrack = 99: Sent to tell the 2D Viewer to update the 3D viewer’s active track
GM_Event_SelectionAboutToClear = 100: Sent before all selected features are to be cleared
GM_Event_SelectionChanged = 101: Sent when the selection of multiple unspecified items changes (data is FeatureList_t* with list of features whose selection changed)
GM_Event_LidarSelectionChanged = 102: Sent whenever the selected Lidar points changes. (data is VectorOverlayList_t* of layers that were changed)
GM_Event_CustomModelRemoved = 103: Send whenever a custom 3D model is removed (data is PointModelInfo_t*)
GM_Event_FeatureString = 104: Retrieve feature string (data is GM_FeatureString*)
GM_Event_FeatureVertexSelectionChanged = 105: Sent when the selection status of a feature vertex changes (data is Feature* that was changed)
GM_Event_MeasurePointCollectionChanged = 106: Sent when the measure tool’s point collection changed (data is bool* indicating whether measuring is active)
GM_Event_MeasureStopMeasuring = 107: Sent when the measure tool stops measuring
GM_Event_LicenseDongleFound = 108: Sent whenever a HASP dongle license is found
GM_Event_EnterMeasureMode = 109: Sent when measure mode is entered
GM_Event_LeaveMeasureMode = 110: Sent when measure mode is left
GM_Event_VertDispOptsChanged = 111: Sent whenever the vertical display options (vert exag, light angle, etc.) are changed.
GM_Event_LidarClassNameChanged = 112: Sent whenever the name of a Lidar classification is changed (data is Lidar class code from 0-255)
GM_Event_ThreadCompleted = 113: Sent whenever a thread completes (data is DWORD of thread ID that is being cleaned up or gm.NULL for current) - use to clean up thread local storage
GM_Event_UserPannedView = 114: Sent whenever the user initiates a change of the center of the view
GM_Event_UserZoomedView = 115: Sent whenever the user initiates a change of the zoom of the view
GM_Event_IncrementalRepaintSkipped = 116: Sent whenever an incremental repaint is skipped because it is disabled
GM_Event_PreTranslateMessage = 117: Sent only to GM extensions. Should only need to be handled if the extension has a modeless dialog.
GM_Event_GetExtensionCommandState = 118: Sent only to GM extensions. Handle to provide enable/check state for toolbar buttons/menus. Data is a GM_ExtCommandState_t*.
GM_Event_AppClosing = 119: Sent whenever the GM application is shutting down. Handle to clean up static state.
GM_Event_EventList = 120: Sent whenever an event had been locked to prevent a flood of events. Contains all event data. Data is GM_EventList_t*.
GM_Event_ViewChanged = 121: Sent whenever the displayed view bounds changes. Check the active view to see what is redrawing.
GM_Event_OrientationChanged = 122: Sent whenever the orientation changes
GM_Event_CurrentShaderChanged = 123: Sent whenever the current shared elevation shader changes
GM_Event_LidarClassGroupChanged = 124: Sent whenever the class group for a given Lidar classification is changed (data is Lidar class code from 0-255)
GM_Event_PathProfileChanged = 125: Sent whenever a path profile (either active or displayed in a path profile control) changes (data is CCtrlPathProfileLOS* if in a control or gm.NULL if from the active profile tool)
GM_Event_PathProfileViewPos = 126: Sent whenever the current path profile view position changes. Data is Point3D* (0 if no point is available)
GM_Event_DocumentDeleting = 127: Sent when the document object is being deleted
GM_Event_ThreadPreCompleted = 128: DEPRECATED - Sent before the GM_Event_ThreadCompleted event so that anything that needs handle before the main thread completed cleanup can happen. Data is thread handle being completed or O for current thread.
GM_Event_CurrentWorkspaceChanged = 129: Sent whenever the current workspace filename changes.
GM_Event_RestoreDefaultSettings = 130: Sent whenever the user has selected the ‘restore default settings’ button on the Config dialog
GM_Event_FlyThroughPathChanged = 131: Sent whenever the user has modified a fly-through path
GM_Event_StartEditMode = 132: Sent when the user enters edit mode by selecting a feature type to create (data is GM_DrawFeatureType*)
GM_Event_StopEditMode = 133: Sent when the user cancels edit mode
GM_Event_LidarPointCloudAdded = 135: Sent whenever a new Lidar point cloud is added to an already loaded layer (data is LidarPointCloud_t*)
GM_Event_FeatureAttrListChanged = 136: Sent whenever the attribute list of a feature is changed (item data is Feature* that was changed)
GM_Event_FeatureIs3DChanged = 137: Sent whenever the ‘is 3D feature’ status of a feature is changed (item data is Feature* that was changed)
GM_Event_3dView2dBoundsClipping = 139: Sent when the setting for 3D viewer’s 2D bounds clipping is changed (no item data)
GM_Event_FeatureMeshGeometryChanged = 140: Sent whenever the geometry (vertices, normals, etc.) of a feature mesh is changed (item data is FeatureMesh* that was changed)
GM_Event_LayerDescriptionChanged = 141: Sent when the layer description changes (item data is GeographicOverlay* with the changed description)
GM_Event_MeasureAttrsChanged = 142: Sent whenever one or more measure attributes changes for a feature. Send instead of GM_Event_FeatureAttrListChanged (data is Feature* that was updated)
GM_Event_Search_Modified = 143: Sent when a search criteria has changed. Initially used for searching layers in the control center.
GM_Event_LidarRenderDataChanged = 144: Sent whenever a value being drawn for Lidar points in a cloud changes (data is LidarPointCloud_t*)
GM_Event_LidarNonRenderDataChanged = 145: Sent whenever a value NOT being drawn for Lidar points in a cloud changes (data is LidarPointCloud_t*)
GM_Event_LoadingUserSettingsUI = 146: Sent when importing user settings that require a reload
GM_Event_TerrainPaintCompleted = 147: Sent when a terrain paint operation has modified elevations
GM_Event_3dViewListChanged = 148: Sent when the number of 3d views change
GM_Event_RenderStartProfile = 149: Sent when a path profile render operation starts (data is CCtrlPathProfileLOS being rendered)
GM_Event_RenderStopProfile = 150: Sent when a path profile render operation finishes (data is CCtrlPathProfileLOS being rendered)
GM_Event_FeatureLabelChanged = 151: Sent whenever the display label of a feature is changed (item data is Feature* that was added)
GM_Event_FeatureDescChanged = 152: Sent whenever the description of a feature is changed (item data is Feature* that was added)
GM_Event_FeaturesRemoved = 153: Sent whenever one or more features are removed (not deleted, actually removed) from a layer (item data is VectorOverlay* that the features were removed from)
GM_Event_LayerUniqueIdChanged = 154: Sent whenever the unique ID for a layer is changed (data is GeographicOverlay*)
GM_Event_IslandFeatureAdded = 155: Sent whenever a new island is added to an already loaded area feature (item data is FeatureAreaIsland* that was added)
GM_Event_GmmDiscovered = 156: Sent whenever a mobile device running GMM is discovered (item data is MobileDataManagementClient::DeviceInfo_t)
GM_Event_GmmConnectionStatusChanged = 157: Sent whenever the connection to a mobile device running GMM has changed (item data is bool, true if connected)
GM_Event_NewScriptBuilderStepAdded = 158: Sent whenever there is a new script builder command added
GM_Event_NumNonGPS = 159: Number of non-GPS event ID
GM_Event_MinGPS = 1000: The minimum GPS event ID
GM_Event_GPSAutoDetectDone = 1000: GPS auto-detect has completed
GM_Event_GPSAutoDetectStart = 1001: GPS auto-detect has started
GM_Event_GPSDeviceChange = 1002: GPS device has changed
GM_Event_GPSInitDone = 1003: GPS initialization is done
GM_Event_GPSLoggingSettingsChanged = 1004: GPS logging settings have changed
GM_Event_GPSModeChange = 1005: GPS mode has changed
GM_Event_GPSMultiVehicleUpdate = 1006: GPS update of multi-vehicle position list
GM_Event_GPSNewNmeaSentence = 1007: GPS report of new NMEA sentence read
GM_Event_GPSPosition = 1008: GPS position report
GM_Event_GPSReportEndOfFile = 1009: GPS end of NMEA file has been reached and we’re not looping
GM_Event_GPSReportFix = 1010: GPS fix is reported
GM_Event_GPSReportLostDiff = 1011: GPS differential fix was lost
GM_Event_GPSReportLostFix = 1012: GPS fix was lost
GM_Event_GPSReportNotUsable = 1013: GPS fix is not usable
GM_Event_GPSReportValidDiff = 1014: GPS differential fix was detected
GM_Event_GPSSatStatusChange = 1015: GPS satellite status has changed
GM_Event_GPSTextMessageReceived = 1016: GPS text message received (event data is GPS_txt_msg_type*)
GM_Event_GPSTrackingStopped = 1017: GPS tracking was stopped
GM_Event_GPSWaypointReceived = 1018: GPS waypoint received (event data is GPS_waypoint_type*)
GM_Event_GPSTrackingStarted = 1019: GPS tracking was started
GM_Event_GPSKeepVesselOnScreenChanged = 1020: The ‘keep GPS vessel on screen’ or ‘keep video playback location on screen’ setting changed
GM_Event_GPSTrackUpDisplayChanged = 1021: The ‘rotate map to match GPS heading or video playback heading’ setting changed
GM_Event_GPSKeepTargetPolyOnScreenChanged = 1022: The ‘keep GPS/video target polygon on screen’ setting changed (Aerial Filmworks)
GM_Event_MaxGPS = 1022: The maximum GPS event ID. Always update when adding a new GPS event.

GM_Event_Invalid = -1

globalmapper.GM_ExtCmdStateFlags_t32

Flag definition for controlling extension command item state

Values:

GM_ExtCmdState_Disable = 0x00000001: Disable the command item
GM_ExtCmdState_Check = 0x00000002: Check/press the command item

globalmapper.GM_Language_t8

Enumeration of native languages possible for a build.

Values:

GM_LANG_ENGLISH = 0

GM_LANG_ARABIC = 1

GM_LANG_FRENCH = 2

GM_LANG_GREEK = 3

GM_LANG_ITALIAN = 4

GM_LANG_KOREAN = 5

GM_LANG_JAPANESE = 6

GM_LANG_PORTUGESE = 7

GM_LANG_CHINESE_TRADITIONAL = 8

GM_LANG_SPANISH = 9

GM_LANG_POLISH = 10

GM_LANG_RUSSIAN = 11

GM_LANG_TURKISH = 12

GM_LANG_GERMAN = 13

GM_LANG_NUM_LANGUAGES = 14

globalmapper.GM_LogLevel_t8

Error logging levels. Lower is higher priority

Values:

Logging values

GM_Log_Critical = 0

GM_Log_Error = 1

GM_Log_Warning = 2

GM_Log_Status = 3

GM_Log_Debug = 4

GM_Log_ExtremeDebug = 5
Extreme debugging, only access via registry. Will issue TRACE otherwise.

Special values for different log files

GM_Log_Timing = 100
Log a timing. Goes to timings.txt

Other special value/aliases

GM_Log_ImportantStatus = GM_Log_Error
Log status in almost all cases. Just don’t want to look like error in code

GM_Log_HighestLogLevel = GM_Log_ExtremeDebug

GM_Log_DontLog = 253
Don’t log message. Used as special value in function parameters to see if logging is needed. Note this will still issue a TRACE if passed to GM_LOG_MSG in Debug.

GM_Log_Nothing = 254
Don’t log or trace the message. Used as special value in function parameters if we want to keep log code to re-enable later.

GM_Log_NotRead = 255 The log level has not been read yet

globalmapper.GM_MenuType_t

Menu types that an extension context menu item can be added to.

Values:

GM_Menu_Digitizer = 0

GM_MenuNumTypes = 1

globalmapper.GM_MiscOpt_t32

Misc. advanced options flags used with GM_SetMiscOptionEx

Values:

GM_MiscOpt_DXFInsertsAsPoints = 0: Import DXF INSERT entities as points
GM_MiscOpt_TIFFPreferTFW = 1: Prefer TFW coordinates for GeoTIFF files
GM_MiscOpt_ExportOldFormatPRJ = 2: Export old format PRJ instead of new format
GM_MiscOpt_DXFLayersAsCustomTypes = 3: Add new custom types for DXF layers
GM_MiscOpt_HideNonIconRoadLabels = 4: Hide any road labels that are not icons
GM_MiscOpt_ClampGridToDataBounds = 5: Don’t expand grid lines beyond the edge of loaded data
GM_MiscOpt_BILQueryFor16BitType = 7: When loading BIL (and other similar) imagery that is 16-bit and single band, ask the user if it is elevation or imagery data
GM_MiscOpt_BorderHighlightAreas = 8: Only draw a thick border for highlighted areas rather than a filled cross-hatch
GM_MiscOpt_AddRecIDAttribute = 9: Add record ID (index) as attribute for vector features from some file types
GM_MiscOpt_DefaultToOEMCharset = 11: Make default font display use the OEM character set (codepage 437) rather than the ANSI character set (codepage 1252)
GM_MiscOpt_CenterLabelsTransparent= = 12: Make labels centered on lines use transparent background rather than opaque
GM_MiscOpt_MarkAddressedSegments = 13: Mark line segments with addressing with dashed styles on the side(s) of the line with addressing
GM_MiscOpt_HideOffscreenLabels = 14: Don’t display any labels that aren’t completely onscreen
GM_MiscOpt_UseCRLFInWorldFiles = 15: Use CR/LF to terminate lines in exported world files rather than just LF
GM_MiscOpt_LogDebugMessages = 16: DEPRECATED - Use GM_MiscOpt_SetLogLevel instead - Log debug messages to a file or via message callback
GM_MiscOpt_DontCropAtATM = 17: Don’t crop lat/lon area and line features that cross the ATM or have bad lat/lon values
GM_MiscOpt_DisableAutoSmooth = 18: Disable automatic interpolation of raster data at intermediate zoom levels
GM_MiscOpt_UseFilePathForExport = 19: Use path to first loaded file as default export path
GM_MiscOpt_MarkTurnRestrictions = 20: Mark the ends of lines involved in turn restrictions
GM_MiscOpt_DontAutoContrastDGTiffs = 21: Disable automatic contrast adjustment for Digital Globe imagery
GM_MiscOpt_HideMeasureAttrUnitNames = 22: Hide the unit names on measure unit text
GM_MiscOpt_DGNImportCellsAsPoints = 27: Import DGN cells as point features rather than exploding them
GM_MiscOpt_DGNAddColorToDesc = 28: Add DGN feature color to description in addition to level
GM_MiscOpt_MaintainExportBounds = 32: Maintain export bounds over spacing
GM_MiscOpt_AutoIconizeRoadNames = 33: Automatically iconize road type names on import
GM_MiscOpt_RenderEndpoints = 34: Render area and line start and end vertices
GM_MiscOpt_KeepPixelIfAnyInCropPoly = 37: Keep pixel on export if any part of the pixel is inside the crop polygon/bounds rather than just the center
GM_MiscOpt_LabelLinesOnLongestSeg = 38: Always label lines along longest segment
GM_MiscOpt_AreaLabelsMustFitInArea = 40: Only display area labels if the label fits inside the area feature.
GM_MiscOpt_TreatDbfTextAsUtf8 = 42: DEPRECATED - Treat DBF file text as UTF-8 encoded
GM_MiscOpt_AlwaysInterpolateRasters = 43: Always enable interpolation for raster layers when loading them
GM_MiscOpt_DisableAutoExportInterp = 45: Disable automatic interpolation of reprojected layers during export
GM_MiscOpt_UsePenUpBorderDrawMode = 47: When duplicate vertex is encountered in area feature, turn off next border segment
GM_MiscOpt_UseGridDistance = 51: Measure using grid distance instead of Vincenty lat/lon distance
GM_MiscOpt_AlwaysFakeRasterPos = 53: Always fake the positioning information for unknown raster files
GM_MiscOpt_PlacePRJAfterFullFName = 55: Place PRJ after full filename, like test.ecw.prj for test.ecw, when generating PRJ files on export
GM_MiscOpt_IncludeDatumXFormAndEpsgInPRJ = 59: Include datum transformation parameters (TOWGS84) and EPSG does in generated WKT PRJ files. Not compatible with ESRI as morphToEsri removes them.
GM_MiscOpt_DefaultContrastMinMax = 60: Default auto contrast adjustment to linear min/max stretch
GM_MiscOpt_S57IncludeValAndDesc = 61: Include both the value and description in the attributes for S57 features
GM_MiscOpt_UseRhumbLineDistance = 63: Measure using rhumb line distance instead of Vincenty lat/lon or grid distance
GM_MiscOpt_DisableAutoContrast = 64: Disable automatic constrast adjustment for high bit depth images
GM_MiscOpt_SnapExportToPixel = 65: Snap non-reprojected exports to raster data pixel boundary
GM_MiscOpt_NoAutoInterpTerrain = 66: Disable automatic interpolation of terrain layers on import
GM_MiscOpt_GeoTIFFNoCompDefault = 69: Default GeoTIFF exports to no compression
GM_MiscOpt_MeasureWholeNumbers = 73: Force measurements to use nearest whole number (integer) value
GM_MiscOpt_ShowSegLensOnMap = 74: Label the length of each line segment on the map.
GM_MiscOpt_ShowSegBearingsOnMap = 80: Label the bearing of each line segment on the map.
GM_MiscOpt_CheckBinarySTL = 81: Check ‘export binary STL’ option on export options dialog
GM_MiscOpt_DontCopyErrorToClip = 82: Don’t automatically copy error messages to the clipboard
GM_MiscOpt_LoadExifJpgAsImage = 83: Ignore EXIF position data in JPG files and load them as images instead
GM_MiscOpt_DontAppendGridUnits = 84: Don’t append unit labels (like ‘m’) to projected grid line labels
GM_MiscOpt_DisableCustomFileSave = 85: Disable the save of custom features to files on shutdown, like custom_datums.txt, etc.
GM_MiscOpt_OnlySnapToPoints = 88: Only snap to point features by default
GM_MiscOpt_SnapExportToSpacing = 89: Snap exports to nearest sample spacing boundary
GM_MiscOpt_S57ShortAttrNameVal = 90: Use short attribute names and raw values in S57 attribute list
GM_MiscOpt_ElevCropAreaBoundsGrid = 91: When cropping an elevation export to an area, treat the area bounds as grid cell and not visual bounds
GM_MiscOpt_RectifyNo2ndDegPoly = 93: Don’t switch to 2nd degree polynomial rectification method for 6+ control points
GM_MiscOpt_ScaleElevShaderToView = 94: Scale elevation shader to just the elevation values that are currently in view
GM_MiscOpt_GPSUseShaderForVessel = 95: Use the current elevation shader and GPS elevation to color the GPS vessel
GM_MiscOpt_GPSUseShaderForTrack = 96: Use the current elevation shader and GPS elevation to color the GPS track
GM_MiscOpt_OnlineExportZoomSameAsDraw = 98: When exporting from an online source, use the exact same logic to select the zoom level as is used during draw
GM_MiscOpt_RestoreLastMapLayout = 99: Restore the last used map layout between sessions rather than just through workspaces
GM_MiscOpt_HideStyleAttr = 101: Don’t display any style attributes that are included with features at load time
GM_MiscOpt_KeepEntireClippedFeature = 102: When exporting cropped to a polygon, keep the entire area/line if it overlaps crop areas at all
GM_MiscOpt_MSSQLUseGeometryColumns = 103: When importing from MS SQL Server, use geometry_columns table to get list of spatial tables
GM_MiscOpt_DontPrependGroupsToLayerNames = 105: Don’t prepend layer group names to layer names in layer selection list in feature edit dialog
GM_MiscOpt_OnlineTilesSaveWorldFile = 107: Automatically create world files and PRJ files for downloaded online tiles. Bug 15140
GM_MiscOpt_DontPreventLabelCollisionsAcrossLayerGroups = 108: Don’t prevent the collision of labels across layer group boundaries when drawing and labeling each vector layer separately rather than all at once.
GM_MiscOpt_PdfUseOldRenderer = 109: Use the old GDI+ render engine for PDF display on load rather than new DPLR (QuickPDFRenderer.dll) rendering engine. Can fix issues with display of some files that new engine doesn’t show correctly.
GM_MiscOpt_DontSaveViewLayoutToGMW = 110: If set, don’t save or restore non-default multi-view layouts to/from workspace files
GM_MiscOpt_DontShowPerpProfileHelpTip = 111: If set, don’t show the instructional tip when initially adding a feature for extraction on the path profile control
GM_MiscOpt_GPSStartTrackingAtStartup = 112: If set, GPS tracking will attempt to start when the application initially starts
GM_MiscOpt_RenderAutoCropPolyOnMap = 113: If set, render automatic crop polygons (PDF, BSB, etc.) on map when present. Use for debugging crop boundaries.
GM_MiscOpt_ControlCenterReverseOrder = 114: If set, the layers in the Control Center will render with the top displayed layer as the first item and proceed down the draw stack from there.
GM_MiscOpt_DontCenterMapOnSelVertex = 115: If set, we will NOT center the main map view on the selected vertex when clicking on it on the Feature Vertices dialog
GM_MiscOpt_ReformatDbfNumbers = 116: If set, we will reformat any DBF file Number fields in scientific notation to a prettier format if in a normal range (i.e. no huge exponent)
GM_MiscOpt_OverviewDrawLabels = 117: Indicates whether or not to draw feature labels in the Overview Map window
GM_MiscOpt_OverviewTrackVisibleLayers = 118: Indicates whether or not the overview window bounds will include only visible layers
GM_MiscOpt_DisableScriptRunCommand = 119: If set, the RUN_COMMAND script command will not be allowed to run (Bug 20859). Should NOT be able to change this from a script.
GM_MiscOpt_DisplayLatLongPadding = 120: If set, the Lat/Long values displayed in the status bar will be zero padded (lat = DD, long = DDD)
GM_MiscOpt_OverlapFakePosRasterLayers = 121: When loading image layers and faking the location for display, should we draw them on top of each other or next to each other?
GM_MiscOpt_GridRemoveTrailingZeros = 122: Remove trailing zeros on grid coordinate labels
GM_MiscOpt_HideSelFeatures = 123: If set, selected features should not be drawn
GM_MiscOpt_LidarUpdateRetCountOnDelete = 124: Should we update the return count and number for Lidar points when deleting from a multi-return pulse?
GM_MiscOpt_DefaultUserCreatedLayer = 125: Make the old User Created Features layer the default.
GM_MiscOpt_DefaultUseDisplayProjection = 126: Use the current display projection instead of asking user for one when creating layers
GM_MiscOpt_DisplayTimesAsUTC = 127: Display vertex timestamps using UTC rather than local time (Bug 26506)
GM_MiscOpt_UseUserDefinedAnimationTime = 128: Use the default total animation time when determining animate frame update rate.
GM_MiscOpt_NoLayerSaveWarning = 131: If set, don’t show warning asking if yo want to save modified layer before closing
GM_MiscOpt_NoLayerReorderWarning = 132: If set, don’t show warning when reordering layer around a grouped layer
GM_MiscOpt_LidarSaveRetCountUpdatedPts = 133: If set, save a debug layer with all Lidar points that had their return count updated due to deletion
GM_MiscOpt_SnapToLidar = 134: If set, snap to Lidar points when digitizing
GM_MiscOpt_DGNImportByLevel = 135: When importing DGN, split features into GM layers by DGN Level
GM_MiscOpt_DWGImportByLayer = 136: When importing DWG/DXF, split features into GM layers by DWG/DXF layer
GM_MiscOpt_XYZLoadAsLidarCloud = 137: If set XYZ ascii file will be loaded as a Lidar point cloud
GM_MiscOpt_UpdatePicturePointExifOnMove = 138: Update picture point image file EXIF if point is moved
GM_MiscOpt_BackupPicturePointImageOnUpdateExif = 139: Create backup when modifying picture point image file EXIF
GM_MiscOpt_GeoTIFFExportOverview = 140: Export overview with GeoTIFF
GM_MiscOpt_DWGUseLegacyImporter = 141: Use the legacy importer for DWG files (convert to DXF, then import with the legacy DXF importer)
GM_MiscOpt_DXFUseLegacyImporter = 142: Use the legacy importer for DXF files
GM_MiscOpt_S57DontMultiLayerLoad = 143: Don’t prompt the user to load view groups into different layers
GM_MiscOpt_ShowGridRefForBritGrid = 144: Show grid ref on status bar instead of northing and easting
GM_MiscOpt_FormatEpochAttrEditor = 145: Show epoch dates as mm/dd/yyyy format in the attribute editor
GM_MiscOpt_GpsDontExportActiveTrack = 146: Don’t export the actively recording track layer when doing a vector export
GM_MiscOpt_StayInMoveMode = 147: Don’t cancel move mode after moving
GM_MiscOpt_DontUseAutoStylePoint = 151: Do not use auto styling for point features
GM_MiscOpt_DontUseAutoStyleArea = 152: Do not use auto styling for area features
GM_MiscOpt_DontUseAutoStyleLine = 153: Do not use auto styling for line features
GM_MiscOpt_ColorAbsValueLidarScanAngle = 154: When coloring Lidar by scan angle, just color the absolute value of the scan angle (positive and negative look the same)
GM_MiscOpt_ForceCPUforAITools = 155: If set, AI tools (training and inference) will be run on cpu even if a gpu is available
GM_MiscOpt_DrawFatRoads = 256: Draw roads with fat style when zoomed in
GM_MiscOpt_LinearMeasureUnits = 257: Linear measurement units (value is GM_LinearUnits_t8 type)
GM_MiscOpt_AllowUnlimitedECWExportSize = 258: Allow ECW exports greater than 500MB uncompressed. You must have the appropriate license from Erdas to do this.
GM_MiscOpt_SetVectorExportElevUnits = 259: Specifies the elevation units to use when exporting 3D features with per-vertex elevations or associated single elevation values (value is GM_ElevUnits_t8, but must be meters or feet)
GM_MiscOpt_PositionDisplayFormat = 260: Position display format (value is GM_PosDisplayFormat_t8 type)
GM_MiscOpt_AreaMeasureUnits = 261: Area measurement units (value is GM_AreaUnits_t8)
GM_MiscOpt_VolumeMeasureUnits = 262: Volume measurement units (value is GM_VolumeUnits_t8)
GM_MiscOpt_SetDefaultFontCharset = 263: Sets the default font character set (value is Windows character set enumeration, like OEM_CHARSET, RUSSIAN_CHARSET, etc.)
GM_MiscOpt_ElevDispExpUnits = 264: Sets the default elevation display/export units (value is GM_ElevDisplayUnits_t8 type)
GM_MiscOpt_SetLogLevel = 265: Sets the error/debug log level (value is GM_LogLevel_t8)
GM_MiscOpt_SetLogFilename = 266: Sets the log filename (value is str) - Use GM_SetMiscOptionEx
GM_MiscOpt_SetTimingsFilename = 267: Sets the filename to log detailed timings to (value is str) - Use GM_SetMiscOptionEx
GM_MiscOpt_SetTempFolder = 268: Sets the base temporary file path (value is str) - Use GM_SetMiscOptionEx
GM_MiscOpt_GPSCenterOnVehicle = 269: Automatically center the display on the GPS location
GM_MiscOpt_GPSOrientTrackUp = 270: Automatically rotate the display so the GPS heading points directly up
GM_MiscOpt_CenterOnTargetPoly = 271: Automatically center the display on the GPS/video target polygon (Aerial Filmworks extension)
GM_MiscOpt_VideoCenterOnVehicle = 272: Automatically center the display on the video playback location
GM_MiscOpt_VideoOrientTrackUp = 273: Automatically rotate the display so the video playback heading points directly up
GM_MiscOpt_BearingSense = 274: Bearing sense (i.e. True North, Mag North, Grid North) (value is GM_BearingSense_t8)
GM_MiscOpt_SetLidarDrawMode = 275: Sets the global Lidar draw mode used when Lidar module active (value is GM_LidarDrawMode_t8)
GM_MiscOpt_SetDefaultProjection = 276: Sets the default projection to use at startup (or None to reset) (value is GM_Projection_t*)
GM_MiscOpt_Invalid = 0xFFFFFFFF: Invalid
GM_MiscOpt_IncludeDatumXFormInPRJ = GM_MiscOpt_IncludeDatumXFormAndEpsgInPRJ: Renamed value defined for backwards compatibility

globalmapper.GM_MiscOptVal_t8

Miscellaneous option values. Pass to GM_SetMiscOption

Values:

GM_MiscOptVal_Off = 0: Don’t set option
GM_MiscOptVal_On = 1: Set option
GM_MiscOptVal_Toggle = 2: Toggle option

globalmapper.GM_ProgressUpdate_t8

Types of progress reported through GM_ProgressCallbackFunc

Values:

GM_PROGRESS_START = 0: Progress has started
GM_PROGRESS_UPDATE_STATUS = 1: Status string updated
GM_PROGRESS_UPDATE_PERCENT = 2: Percent complete updated
GM_PROGRESS_STOP = 3: Operation has completed
GM_PROGRESS_RENDER_UPDATE = 4: The device context for a draw has been updated
GM_PROGRESS_DOWNLOAD_FAILED = 5: Tile download failed for online source
GM_PROGRESS_UPDATE_CAPTION = 6: Caption string set/updated. The caption will be in the status parameter of the callback
GM_PROGRESS_CHECK_CANCEL = 7: Call made just to check for cancel

GM_PROGRESS_NUM_TYPES = 8

globalmapper.GM_SmartPromptReturn_t32

Type to use for optional prompt when you want to specify whether to show a prompt or not and if it has already been shown, the value to use. The upper 2 bits are used for state to control whether or not the prompt should be shown (and if so has it already). The lower 30 bits will be the prompt return value, like IDYES, IDNO, OR IDCANCEL.

Values:

GM_Prompt_ShowPrompt = 0x80000000: Show the prompt
GM_Prompt_AlreadyShown = 0x40000000: The prompt has already been shown

globalmapper.GM_SpecialLayerPtr_t

Special layer pointers for list item data. All are odd numbers so that they will never be a real pointer value.

Values:

GM_Layer_AddToUserCreated = 1: Add feature to User Created Features layer
GM_Layer_MultipleSelectedParents = 3: Multiple layers selected for selection that allows one layer
GM_Layer_CreateNewLayerParent = 5: Create a new layer for for feature
GM_Layer_MapLayoutLayers = 7: Represents map layout layers (scale bar, legend, etc.)
GM_Layer_GPSLayers = 9: Represents GPS position and track layers
GM_Layer_NewLayerFromFile = 11: Load a new layer from a file
GM_Layer_NormalPtr = 0xFFFFFFFF: Special value for normal layers when stored as a type

GM_Layer_MinSpecialLayerPtr = GM_Layer_AddToUserCreated

GM_Layer_MaxSpecialLayerPtr = GM_Layer_NewLayerFromFile