7.2.8 GM_DBUtil
（1）声明
public static class GM_DBUtil
（2）方法
| 方法 | 描述 |
| DBGetTableList | 获取指定空间数据库中的表列表 |
| DBIsDatabaseFile | 指示输入文件是否为数据库（Esri地理数据库、Spatialite等） |
| DBMakeConnectionString | 从输入连接参数创建连接字符串 |
| DBSelectExportTable | 显示对话框，允许用户选择要导出数据的表 |
| DBSelectTable | 显示对话框，允许用户选择一个或多个要加载的表 |
| DBTableList_Free | 释放与表列表关联的内存 |
| DBTableList_GetCount | 获取表列表中的表数 |
| DBTableList_GetTableName | 获取指定索引处的表名 |
| DBTestConnection | 测试输入的连接字符串，以查看是否可以用于连接到数据库 |
DBGetTableList
public static GM_Error_t32 DBGetTableList(out IntPtr aTableList, //Table list handlestring aConnectionInfo //Connection string or database file name
)
DBIsDatabaseFile
public static bool DBIsDatabaseFile(string aFileName //The file name
)
DBMakeConnectionString
public static GM_Error_t32 DBMakeConnectionString(out string aConnectionStr, //The connection string bufferuint aBufferLength, //The length of the connection string bufferGM_DBConnectionParams_t aConnectionParams //The connection parameters
)
DBSelectExportTable
public static GM_Error_t32 DBSelectExportTable(out string aTable, //Buffer for storing table nameuint aBufferLength, //The length of the table name bufferout bool aTableExists, //Indicates whether or not the selected table existsstring aConnectionStr //Connection parameter string or database file name
)
DBSelectTable
public static GM_Error_t32 DBSelectTable(out IntPtr aTableList, //Handle for list of selected table namesstring aConnectionStr //Connection parameter string or database file name
)
DBTableList_Free
public static GM_Error_t32 DBTableList_Free(ref IntPtr aTableList //Table list handle to be freed
)
DBTableList_GetCount
public static GM_Error_t32 DBTableList_GetCount(out uint aCount, //The number of table names in the listIntPtr aTableList //Table list handle
)
DBTableList_GetTableName
public static GM_Error_t32 DBTableList_GetTableName(out string aTableName, //Buffer in which table name will be placeduint aIndex, //The zero-based index for the table nameIntPtr aTableList //Table list handle
)
DBTestConnection
public static GM_Error_t32 DBTestConnection(string aConnectionStr //Connection parameter string
)
7.2.9 GM_Exception
（1）声明
public class GM_Exception : Exception
（2）构造函数
public GM_Exception()public GM_Exception(string message //Any additional error information that could be gathered
)public GM_Exception(GM_Error_t32 error //The GM_Error to be assosicated with this exception
)public GM_Exception(string message, //Any additional error information that could be gatheredException inner //The Inner Exception
)public GM_Exception(GM_Error_t32 error, //The GM_Error to be assosicated with this exceptionstring message //Any additional error information that could be gathered
)
（3）属性
| 属性 | 描述 |
| ErrorCode | 与异常相关的GM_Error Code |
ErrorCode
public GM_Error_t32 ErrorCode { get; }
7.2.10 GM_Export
（1）声明
public static class GM_Export
（2）方法
| 方法 | 描述 |
| ExportElevation | 将一个或多个图层导出为新的分块高程文件。 |
| ExportElevationEx | 将一个或多个图层导出为新的分块高程文件。 |
| ExportMapLayoutComponent | 将地图布局组件导出为位图图像文件。 |
| ExportPackage | 将一个或多个图层导出为新的包文件（在WinCE上未实现）。 |
| ExportPDF | 将一个或多个图层导出为新的GeoPDF文件（在WinCE上未实现）。 |
| ExportRaster | 将一个或多个图层导出为新的栅格文件（在WinCE上未实现）。 |
| ExportRasterEx | 将一个或多个图层导出为新的栅格文件（在WinCE上未实现）。 |
| ExportRasterFromBitmap | 将一个或多个图层导出为新的栅格文件（在WinCE上未实现）。 |
| ExportVector | 将一个或多个图层导出为新的矢量文件（在WinCE上未实现）。 |
| ExportVectorList | 将一个或多个图层导出为新的矢量文件（在WinCE上未实现）。 |
| ExportWebFormat | 将一个或多个图层导出为适用于在Web浏览器或其他基于Web的工具中显示的Web格式文件。 |
| SetExportCropAreas | 在导出时设置要使用的裁剪区域。 |
7.2.11 GM_ExportOptsPDF_t
（1）声明
public class GM_ExportOptsPDF_t
（2）构造函数
public GM_ExportOptsPDF_t()
（3）字段
| 方法 | 描述 |
| mBorderColor | 边框线颜色。 |
| mBorderStyle | 边框线样式（如实线、虚线等）。 |
| mBorderWidth | 边框线宽度（以PDF点为单位的像素）。 |
| mDPI | 导出DPI。 |
| mFlags | 导出标志。 |
| mFooterFont | 页脚字体（默认为NULL）。 |
| mFooterStr | 页面页脚（无页脚则为NULL）。 |
| mHeaderFont | 页眉字体（默认为NULL）。 |
| mHeaderStr | 页面页眉（无页眉则为NULL）。 |
| mMarginRect | 边距（以英寸为单位）。 |
| mPageSizeName | 页面大小名称，如“Letter”，“Legal”，“A0”等。 |
| mSymbolScale | 点符号缩放因子（0.0将被视为1.0，使用2.0可以将大小加倍，0.5可以减半等）。 |
7.2.12 GM_FindFeatures
（1）声明
public static class GM_FindFeatures
（2）方法
| 方法 | 描述 |
| FindFeaturesInArea | 查找包含在给定区域要素内的要素。 |
| FindNearestAddress | 查找离搜索位置最近的地址。 |
| FindNearestFeatures | 查找与给定像素位置的像素距离内的要素。 |
FindFeaturesInArea
public static GM_Error_t32 FindFeaturesInArea(GM_LayerList_t aLayerList, //List of layers to search or NULL for all vector layersGM_FindFlags_t32 aFindFlags, //Flags controlling how the find is performedGM_AreaFeature_t aAreaToSearch, //Area feature to search (use GM_GetAreaFeature to get from loaded layer)GM_Projection_t aAreaProj, //Projection of coordinates in area feature (use GM_GetLayerInfo()->mNativeProj to get layer projection)
aResultsout GM_FoundFeatureResults_t aResults, //Results of find operation (use GM_FreeFeatureResultList to free when done)Object aReserved //Reserved for later use, must be NULL (0)
)
FindNearestAddress
public static GM_Error_t32 FindNearestAddress(GM_Point_t aSearchPt, //Search location in current view projection (as returned by GM_SetProjection)GM_LayerList_t aLayerList, //List of layers to search or NULL for all vector layersout string aAddressStr, //Buffer to hold string for nearest addressuint aMaxAddressLen, //Maximum length of string to store in outputdouble aMaxDistMeters, //Maximum distance in meters to search around search pointObject aReserved //Reserved for later use, must be NULL (0)
)
FindNearestFeatures
public static GM_Error_t32 FindNearestFeatures(GM_Point_t aPixelSearchPt, //Search location in pixel coordinatesGM_LayerList_t aLayerList, //List of layers to search or NULL for all vector layersGM_FindFlags_t32 aFindFlags, //Flags controlling how the find is performedGM_Rectangle_t aWorldBounds, //World bounds for search space or NULL for last drawnGM_PixelRect_t aPixelRect, //Pixel bounds for search space or NULL for last drawnout GM_FoundFeatureCollection_t aNearestFeatures, //List of nearest features (buffer for GM_FoundFeature_t)uint aMaxFeatures, //Max number of nearest features to finduint aMaxDistPixels //Max distance in pixels to search
)
7.2.13 GM_FontDef_t
（1）声明
public class GM_FontDef_t
（2）构造函数
public GM_FontDef_t()
（3）方法
| 方法 | 描述 |
| ToString() | 返回对象的字符串表示形式
（覆盖了Object.ToString()方法）。 |
| ToString(String) | 返回对象的字符串表示形式。 |
ToString
public override string ToString()public string ToString(string theOptions //Additional Font Info: (A) for all, (C) for Color, (F) for Format, (O) for Other
)
（4）操作符
| 操作符 | 描述 |
| Equality | 根据句柄比较两个图层的相等性。 |
| Inequality | 根据句柄比较两个图层的不相等性。 |
Equality
public static bool operator ==(GM_FontDef_t left, //The Left LayerGM_FontDef_t right //The Right Layer
)
Inequality
public static bool operator !=(GM_FontDef_t left, //The Left LayerGM_FontDef_t right //The Right Layer
)
（5）字段
| 字段 | 描述 |
| mAngle | 逆时针旋转角度（0表示从左到右水平）。 |
| mBgMode | 背景填充模式（不透明或透明）。 |
| mCharset | 字符集（使用OEM_CHARSET（255）获取默认行为）。 |
| mColor | 字体的RGB颜色。 |
| mFaceName | 使用的字体名称。 |
| mFixedHgt | 字体的固定高度（以米为单位）（使用0.0表示正常字号字体）。 |
| mHalo | 围绕文本绘制细边框，以在任何背景上使其可见。 |
| mItalicize | 使用斜体绘制文本。 |
| mPlacement | 标签相对于点要素的放置方式（仅适用于点要素）。 |
| mPointSize | 字体的字号（将mFixedHgt值设置为非零以使用固定高度）。 |
| mReserved2 | 保留，必须为0。 |
| mReserved3 | 保留，必须为0。 |
| mStrikeout | 删除线文本。 |
| mUnderline | 下划线文本。 |
| mWeight | 字体的粗细（使用GM_Constants，如FW_BOLD，FW_THIN，FW_NORMAL等）。 |
7.2.14 GM_FoundFeature_t
（1）声明
public class GM_FoundFeature_t
（2）属性
| 属性 | 描述 |
| mDistance | 距离搜索位置的特征像素距离（只读）。 |
| mFeatureClassType | 要素类别（区域、点、线）（只读）。 |
| mFeatureIndex | 要素在图层中的索引（只读）。 |
| mLayer | 要素所在的图层（只读）。 |
mDistance
public uint mDistance { get; }
mFeatureClassType
public GM_FeatureClassType_t8 mFeatureClassType { get; }
mFeatureIndex
public uint mFeatureIndex { get; }
mLayer
public GM_Layer_t mLayer { get; }
（3）方法
| 方法 | 描述 |
| CompareLayer | 将此找到的图层与给定的图层进行比较。 |
CompareLayer
public bool CompareLayer(GM_Layer_t aLayer //The layer to compare against
)
（4）操作符
| 操作符 | 描述 |
| Equality | 检查两个找到的要素之间是否相等。 |
| Inequality | 检查两个找到的要素之间是否不相等。 |
Equality
public static bool operator ==(GM_FoundFeature_t left, //Left side feature to compareGM_FoundFeature_t right //Right side feature to compare
)
Inequality
public static bool operator !=(GM_FoundFeature_t left, //Left side feature to compareGM_FoundFeature_t right //Right side feature to compare
)
7.2.15 GM_FoundFeatureCollection_t
（1）声明
public class GM_FoundFeatureCollection_t
（2）属性
| 属性 | 描述 |
| Count | 找到的要素数量。 |
| Item | 找到的要素列表。 |
Count
public int Count { get; }
Item
public GM_FoundFeature_t this[int index
] { get; }
（3）方法
| 方法 | 描述 |
| GetAreas | 从 FoundFeatureCollection 中获取所有区域要素的列表。 |
| GetLidarPoints | 从 FoundFeatureCollection 中获取所有激光雷达点要素的列表。 |
| GetLines | 从 FoundFeatureCollection 中获取所有线要素的列表。 |
| GetPoints | 从 FoundFeatureCollection 中获取所有点要素的列表。 |
GetAreas
public GM_AreaFeature_t[] GetAreas(GM_GetFeatureFlags_t32 aFlags = 0 //Flags for the get area feature operation
)
GetLidarPoints
public GM_LidarPoint_t[] GetLidarPoints(GM_GetFeatureFlags_t32 aFlags = 0 //Flags for the get point feature operation
)
GetLines
public GM_LineFeature_t[] GetLines(GM_GetFeatureFlags_t32 aFlags = 0 //Flags for the get line feature operation
)
GetPoints
public GM_PointFeature_t[] GetPoints(GM_GetFeatureFlags_t32 aFlags = 0 //Flags for the get point feature operation
)
7.2.16 GM_FoundFeatureResults_t
（1）声明
public class GM_FoundFeatureResults_t : IDisposable
（2）属性
| 属性 | 描述 |
| mFeatureCount | 结果列表中的要素数量。 |
mFeatureCount
public ulong mFeatureCount { get; }
（3）方法
Dispose
public void Dispose()
（4）字段
7.2.17 GM_GPSUtil
（1）声明
public static class GM_GPSUtil
（2）方法
| 方法 | 描述 |
| GPSGetAltitude | 获取当前的GPS海拔高度，如果有效。 |
| GPSGetBearing | 获取当前的GPS方位角，如果有效。 |
| GPSGetFixInfo | 获取当前的GPS定位准确性统计信息。 |
| GPSGetFixType | 获取当前的GPS定位类型。 |
| GPSGetLocation | 获取当前的GPS位置。 |
| GPSGetTime | 以C风格的时间加小数秒的形式获取最后一次GPS定位的UTC时间。 |
| GPSGetVelocity | 获取当前的GPS速度，如果有效。 |
| GPSRenderVessel | 在当前GPS位置将给定大小的GPS船舶渲染到提供的设备上下文中。 |
| GPSStartTrackingNMEAFile | 回放从NMEA日志文件中记录的GPS轨迹。 |
| GPSStartTrackingSerial | 开始跟踪连接到串行端口的GPS设备。 |
| GPSStartTrackingUSB | 开始跟踪连接到USB端口的GPS设备。 |
| GPSStopTracking | 停止跟踪任何已连接的GPS设备。 |
GPSGetAltitude
public static GM_Error_t32 GPSGetAltitude(out float aAltitude //current GPS altitude in meters
)
GPSGetBearing
public static GM_Error_t32 GPSGetBearing(out float aBearing //current GPS bearing in radians from due north
)
GPSGetFixInfo
public static GM_Error_t32 GPSGetFixInfo(out float aHorzPosError, //current horizontal position error in meters (0.0 if unknown)out float aVertPosError, //current vertical position error in meters (0.0 if unknown)out float aPDOP, //current position DOP in meters (0.0 if unknown)out uint aNumSats //number of satellites used in fix (0 if unknown)
)
GPSGetFixType
public static GM_gps_fix_t8 GPSGetFixType()
GPSGetLocation
public static GM_Error_t32 GPSGetLocation(out GM_Point_t aCurPos, //current GPS locationbool aGetLatLon //retrieve coordinates in lat/lon/WGS84 rather than global coords
)
GPSGetTime
public static GM_Error_t32 GPSGetTime(out DateTime aFixTime //fix time
)
GPSGetVelocity
public static GM_Error_t32 GPSGetVelocity(out float aVelocity //current GPS velocity in m/s
)
GPSRenderVessel
public static GM_Error_t32 GPSRenderVessel(IntPtr aDC, //(HDC) Device context to draw toGM_Rectangle_t aWorldBounds, //World bounds to convert from or NULL for last drawnGM_PixelRect_t aPixelRect, //Pixel bounds to convert from or NULL for last drawn uint aVesselHeight, //The vessel height in pixelsuint aVesselWidth, //The vessel width in pixelsuint aVesselColor //The color to render the vessel in
)
GPSStartTrackingNMEAFile
public static GM_Error_t32 GPSStartTrackingNMEAFile(string aFilename, //full path to NMEA file to useGM_gps_nmea_flags_t32 aNmeaFlags, //flags controlling NMEA playbackGM_GPSCallbackFunc aCallbackFunc, //optional callback functionObject aReserved //reserved value (must be NULL)
)
GPSStartTrackingSerial
public static GM_Error_t32 GPSStartTrackingSerial(GM_gps_format_t8 aFormat, //format (NMEA or Garmin)byte aPort, //COM port for serial connectionsuint aBaud, //baud rate for serial portGM_GPSCallbackFunc aCallbackFunc, //optional callback functionuint aReserved //32-bit reserved value (must be 0)
)
GPSStartTrackingUSB
public static GM_Error_t32 GPSStartTrackingUSB(GM_GPSCallbackFunc aCallbackFunc, //optional callback functionuint aReserved //32-bit reserved value (must be 0)
)
GPSStopTracking
public static GM_Error_t32 GPSStopTracking()
7.2.18 GM_GridGenSetup_t
（1）声明
public class GM_GridGenSetup_t
（2）构造函数
public GM_GridGenSetup_t()
（3）字段
| 字段 | 描述 |
| mBounds | （GM_Rectangle_t *）要将边界框网格化到当前的投影单位中。如果要使用所有输入图层的合并边界，则传递NULL（默认值）。 |
| mDesc | 网格描述 |
| mElevUnits | 在哪些单位上生成网格（如果需要，将转换其他单位的高程值） |
| mFlags | 网格生成的标志 |
| mGridAlg | 用于创建高程网格的算法（如果有） |
| mGridBinMult | 如果使用基于 bin 的网格方法，则使用网格 bin 倍数。这是计算点密度的倍数。 |
| mLidarBreaklineBinMult | 在应用断线高度和填充间隙之前，从Lidar网格周围清除的单元格数目（如果使用GM_GridGen_ApplyLidarBreaklines有效）。通常在1-4范围内。 |
| mTaperValue | 区域网格化的锥度值。 0.0表示无锥度（默认值） |
| mTightnessMult | 网格紧密度乘数（乘以分辨率），以丢弃远离样本的值。默认值为零，不会丢弃任何值。对于Lidar bin网格化，通常不希望使用0，因为它可能会非常缓慢，以填充不规则的Lidar数据中的所有间隙。使用GM_GRID_DISABLE_GAP_FILL完全禁用填充间隙。对于Lidar bin网格，间隙填充值通常在1-32范围内。 |
| mXRes | 在当前的投影单位中生成网格的X分辨率（使用0.0进行自动间隔确定） |
| mYRes | 在当前的投影单位中生成网格的Y分辨率（使用0.0进行自动间隔确定） |
7.2.19 GM_Layer_t
（1）声明
public class GM_Layer_t : IDisposable
（2）构造函数
public GM_Layer_t(string aFilename, //The Path to the file to be loadedGM_LoadFlags_t32 aLoadFlags = 0 //Flags for load options
)
（3）属性
Closed
public bool Closed { get; }
（4）方法
| 方法 | 描述 |
| AddAreaToVectorLayer | 向加载的矢量图层添加区域要素 |
| AddLineToVectorLayer | 向加载的矢量图层添加点要素 |
| AddPointToVectorLayer | 向加载的矢量图层添加点要素 |
| Close | 关闭图层并清理非托管代码。返回GM_Error_t32 |
| CombineTerrainLayers | 通过组合两个加载的地形网格图层创建一个新的地形图层（在WinCE上未实现） |
| CreateCustomElevGridLayer | 创建一个用于内存高程网格的新的自定义图层（在WinCE上未实现） |
| CreateCustomRasterLayer | 创建一个用于内存栅格网格的新的自定义图层（在WinCE上未实现） |
| CreateCustomVectorLayer | 创建一个用于添加矢量要素的新的自定义图层 |
| CreateVectorLayerFromFindResults | 根据查找操作的结果创建一个新的矢量图层 |
| Dispose | 与Close执行相同的操作 |
| Draw | 将指定图层的指定部分绘制到DIB中。如果没有显式指定图层，则将绘制所有加载的图层。 |
| Equals | 根据句柄比较两个图层的相等性（重写Object.Equals(Object)。） |
| FlushCache | 刷新图层的任何内存缓存（在低内存环境中非常有用） |
| GetAreaFeature | 获取指定索引处具有可选标志的该图层中的区域要素。 |
| GetAreaFeatureEx | 获取指定索引处具有可选标志的该图层中的区域要素。 |
| GetAvailableOnlineSourceList | 检索所有可用的在线源的列表 |
| GetFeatureElevation | 获取要素的高程。使用SetLayerElevationAttribute设置高程属性的名称。 |
| GetLayerInfo | 返回有关指定图层的信息的副本。如果图层未加载，则返回NULL。 |
| GetLayerLidarStats | 从Lidar图层检索统计数据 |
| GetLidarPoint | 从图层中检索给定索引处的Lidar点要素 |
| GetLineFeature | 以可选标志获取该图层中指定索引处的线要素 |
| GetLineFeatureEx | 以可选标志获取该图层中指定索引处的线要素 |
| GetLocationColor(Double, Double, GM_Color_t) | 从提供的图层或当前加载的栅格和高程图层列表（最顶层图层优先）中的给定位置检索颜色 |
| GetLocationColor(GM_Layer_t, Double, Double, GM_Color_t) | 从提供的图层或当前加载的栅格和高程图层列表（最顶层图层优先）中的给定位置检索颜色 |
| GetLocationElevation(Double, Double, Single) | 从提供的图层或当前加载的高程图层列表（最顶层高程图层优先）中的给定位置检索高程 |
| GetLocationElevation(GM_Layer_t, Double, Double, Single) | 从提供的图层或当前加载的高程图层列表（最顶层高程图层优先）中的给定位置检索高程 |
| GetOnlineSourceInfo | 获取有关在线源的详细信息并检查可用性 |
| GetPixelBandValue(Int32, Int32, Int32, Int32) | 从提供的图层中检索给定像素位置的波段值 |
| GetPixelBandValue(GM_Layer_t, Int32, Int32, Int32, Int32) | 从提供的图层中检索给定像素位置的波段值 |
| GetPixelColor(Int32, Int32, GM_Color_t) | 从提供的图层中检索给定像素位置的颜色 |
| GetPixelColor(GM_Layer_t, Int32, Int32, GM_Color_t) | 从提供的图层中检索给定像素位置的颜色 |
| GetPixelColorRow(Int32,Color[], Color) | 从提供的图层中检索整行颜色值 |
| GetPixelColorRow(GM_Layer_t, Int32,Color[], Color) | 从提供的图层中检索整行颜色值 |
| GetPixelElevation(Int32, Int32, Single) | 从提供的图层中检索给定像素位置的高程 |
| GetPixelElevation(GM_Layer_t, Int32, Int32, Single) | 从提供的图层中检索给定像素位置的高程 |
| GetPixelElevationRow(Int32,Single[], Single) | 从提供的图层中检索整行高程值 |
| GetPixelElevationRow(GM_Layer_t, Int32,Single[], Single) | 从提供的图层中检索整行高程值 |
| GetPointFeature | 使用可选标志获取该图层中指定索引处的点要素的副本 |
| GetPointFeatureEx | 使用可选标志获取该图层中指定索引处的点要素的副本 |
| IsFeatureDeleted | 查询图层中给定索引处要素的删除状态 |
| LoadGenericAsciiTextLayer | 从简单的ASCII文本文件中加载新的图层。将指向该图层的指针存储以便后续调用使用。 |
| LoadLayer | 加载数据文件（已弃用） |
| LoadOnlineLayer | 从在线源（如WMS服务器或TerraServer-USA）加载数据 |
| LoadRectifiedLayer | 从文件中加载新的图层。将指向该图层的指针存储以便后续调用使用。该图层将使用提供的地面控制点和投影进行校正。 |
| RepositionLayer | 重新定位/重投影先前加载的栅格图层 |
| SetAreaFeatureClass | 设置给定要素使用的分类。 |
| SetAreaFeatureDrawStyle | 设置用于区域要素的绘制样式 |
| SetAreaFeaturePointList | 设置用于给定区域要素的点位置列表 |
| SetAreaFeaturePointListEx | 设置用于给定区域要素的点位置列表，包括每个顶点的高程。 |
| SetCodePage | 设置图层的代码页解释 |
| SetFeatureAttrList | 设置用于指定要素的属性值列表。 |
| SetFeatureDelete | 更改图层中给定索引处要素的删除状态 |
| SetFeatureDescription | 设置要素使用的描述。 |
| SetFeatureLabel | 设置要素使用的显示标签。 |
| SetLayerDescription | 设置图层的描述 |
| SetLayerElevationAttribute | 设置用于检索该图层内要素的高程值的属性名称。 |
| SetLayerElevationUnits | 设置用于没有高程单位的3D矢量要素的高程单位 |
| SetLayerEnabled | 设置给定图层是否启用显示。如果禁用，该图层将永远不会被绘制，也不会用作其他半透明或贴图图层的输入。 |
| SetLayerHeightAttribute | 设置用于从该图层内获取点要素的高度值的属性名称。 |
| SetLayerHeightUnits | 设置用于没有高度单位的3D矢量要素的高度单位 |
| SetLayerLabelAttribute | 设置用于设置该图层内要素显示标签的属性名称。 |
| SetLayerPalette | 为图层设置自定义调色板，以覆盖现有调色板。仅适用于基于调色板的图层。 |
| SetLayerUserData | 为图层设置用户数据。 |
| SetLayerUserText | 为图层设置用户文本。保存到工作空间后仍保持不变。 |
| SetLidarPoint | 设置给定索引处从该图层中获取的Lidar点要素 |
| SetLineFeatureClass | 设置给定要素使用的分类。 |
| SetLineFeatureDrawStyle | 设置用于线要素的绘制样式 |
| SetLineFeaturePointList | 设置用于给定线要素的点位置列表 |
| SetLineFeaturePointListEx | 设置用于给定线要素的点位置列表，包括高程列表。 |
| SetPointFeatureClass | 设置给定要素使用的分类。 |
| SetPointFeatureDrawStyle | 设置用于点要素的绘制样式 |
| SetPointFeaturePosition | 设置用于给定点要素的位置 |
| ShowOptionsDialog | 显示图层的显示选项对话框 |
| ToString | 返回对象的字符串表示形式(重写Object.ToString()方法) |
AddAreaToVectorLayer
public GM_Error_t32 AddAreaToVectorLayer(GM_AreaFeature_t aArea, //Area feature to addGM_AddFeatureFlags_t8 aFlags //Flags controlling the add
)
AddLineToVectorLayer
public GM_Error_t32 AddLineToVectorLayer(GM_LineFeature_t aLine, //Line feature to addGM_AddFeatureFlags_t8 aFlags //Flags controlling the add
)
AddPointToVectorLayer
public GM_Error_t32 AddPointToVectorLayer(GM_PointFeature_t aPoint, //Point feature to addGM_AddFeatureFlags_t8 aFlags //Flags controlling the add
)
Close
public GM_Error_t32 Close()
CombineTerrainLayers
public static GM_Layer_t CombineTerrainLayers(GM_GridCombineSetup_t aSetup, //Setup for operationObject aReserved //Reserved for future use, must be NULL
)
CreateCustomElevGridLayer
public static GM_Layer_t CreateCustomElevGridLayer(string aDescription, //Description to use for layer (can be NULL to use default)GM_Projection_t aProj, //Native projection of new layerGM_GridLayout_t aGridLayout, //Grid layer layout and typeIntPtr aElevGrid, //Grid of elevation values in row-major orderObject aReserved //Reserved for future use (must be NULL)
)
CreateCustomRasterLayer
public static GM_Layer_t CreateCustomRasterLayer(string aDescription, //Description to use for layer (can be NULL to use default)GM_Projection_t aProj, //Native projection of new layerGM_RasterLayout_t aRasterLayout, //Raster layer layoutIntPtr aDataBuf //Grid of raster data values in row-major order
)
CreateCustomVectorLayer
public static GM_Layer_t CreateCustomVectorLayer(string aDescription, //Description to use for layer (can be NULL to use default)GM_Projection_t aProj //Native projection of new layer
)
CreateVectorLayerFromFindResults
public static GM_Layer_t CreateVectorLayerFromFindResults(string aDescription, //Description to use for layer (can be NULL to use default)GM_Projection_t aProj, //Native projection of new layerGM_FoundFeatureResults_t aResultList //Results of find operation to create layer from
)
Dispose
public void Dispose()
Draw
public GM_Error_t32 Draw(IntPtr aDC, //Device context to draw toGM_Rectangle_t aWorldBounds, //World bounds to draw or NULL for allint aLeftPixel, //Left pixel coordinate to draw toint aTopPixel, //Top pixel coordinate to draw toint aPixelWidth, //Width in pixels to drawint aPixelHeight //Height in pixels to draw
)
Equals
public override bool Equals(Object obj //The layer to compare to this one
)
FlushCache
public GM_Error_t32 FlushCache()
GetAreaFeature
public GM_AreaFeature_t GetAreaFeature(uint aIndex //Index of Area feature to retrieve
)
GetAreaFeatureEx
public GM_AreaFeature_t GetAreaFeatureEx(uint aIndex, //Index of Area feature to retrieveGM_GetFeatureFlags_t32 aFlags, //Flags for fetching featureObject aReserved //Reserved for future use, must be NULL
)
GetAvailableOnlineSourceList
public static GM_OnlineSourceInfo_t[] GetAvailableOnlineSourceList()
GetFeatureElevation
public GM_Error_t32 GetFeatureElevation(GM_FeatureClassType_t8 aFeatureClassType, //Type of feature class (area, point, line)uint aFeatureIndex, //Index of feature in layerout float aElev //Elevation of feature (in meters)
)
GetLayerInfo
public GM_LayerInfo_t GetLayerInfo()
GetLayerLidarStats
public GM_Error_t32 GetLayerLidarStats(out GM_LidarStats_t aLidarStats, //Buffer to hold stats inObject aReserved //Reserved for future use, must be NULL
)
GetLidarPoint
public GM_Error_t32 GetLidarPoint(ulong aPointIndex, //Index of Lidar point feature to retrieveout GM_LidarPoint_t aLidarPoint, //Lidar point to fill inGM_GetFeatureFlags_t32 aFlags, //Flags for fetching Lidar pointObject aReserved //Reserved for future use, must be NULL
)
GetLineFeature
public GM_LineFeature_t GetLineFeature(uint aIndex //Index of Line feature to retrieve
)
GetLineFeatureEx
public GM_LineFeature_t GetLineFeatureEx(uint aIndex, //Index of Line feature to retrieveGM_GetFeatureFlags_t32 aFlags, //Flags for fetching featureObject aReserved //Reserved for future use, must be NULL
)
GetLocationColor
public GM_Error_t32 GetLocationColor(double aXCoord, //X coord in current projectiondouble aYCoord, //Y coord in current projectionout GM_Color_t aColor //Color of pixel at location
)public static GM_Error_t32 GetLocationColor(GM_Layer_t aLayer, //Layer to get color from or NULL for topmostdouble aXCoord, //X coord in current projectiondouble aYCoord, //Y coord in current projectionout GM_Color_t aColor //Color of pixel at location
)
GetLocationElevation
public GM_Error_t32 GetLocationElevation(double aXCoord, //X coord in current projectiondouble aYCoord, //Y coord in current projectionout float aElev //Elevation at location in meters
)public static GM_Error_t32 GetLocationElevation(GM_Layer_t aLayer, //Layer to get elevation from or NULL for topmostdouble aXCoord, //X coord in current projectiondouble aYCoord, //Y coord in current projectionout float aElev //Elevation at location in meters
)
GetOnlineSourceInfo
public static GM_Error_t32 GetOnlineSourceInfo(string aSourceName, //Name of online source to get detail info forout GM_OnlineSourceInfo_t aSourceInfo, //Detailed information about provided source, mostly in attributesObject aReserved //Reserved for future use, must be NULL
)
GetPixelBandValue
public GM_Error_t32 GetPixelBandValue(int aRow, //Y coord of pixel (0 is topmost)int aCol, //X coord of pixel (0 is leftmost)int aBand, //Band to get value for (0-based, so first band is 1)out int aVal //Color of pixel at location
)public static GM_Error_t32 GetPixelBandValue(GM_Layer_t aLayer, //Layer to get color fromint aRow, // Y coord of pixel (0 is topmost)int aCol, //X coord of pixel (0 is leftmost)int aBand, //Band to get value for (0-based, so first band is 1)out int aVal //Color of pixel at location
)
GetPixelColor
public GM_Error_t32 GetPixelColor(int aRow, //Y coord of pixel (0 is topmost)int aCol, //X coord of pixel (0 is leftmost)out GM_Color_t aColor //Color of pixel at location
)public static GM_Error_t32 GetPixelColor(GM_Layer_t aLayer, //Layer to get color fromint aRow, //Y coord of pixel (0 is topmost)int aCol, //X coord of pixel (0 is leftmost)out GM_Color_t aColor //Color of pixel at location
)
GetPixelColorRow
public GM_Error_t32 GetPixelColorRow(int aRow, //Y coord of pixel (0 is topmost)out Color[] aColorRow, //Pointer to arrow to hold color values for rowColor aInvalidVal //Value to use for invalid pixels
)public static GM_Error_t32 GetPixelColorRow(GM_Layer_t aLayer, //Layer to get color fromint aRow, //Y coord of pixel (0 is topmost)out Color[] aColorRow, //Pointer to arrow to hold color values for rowColor aInvalidVal //Value to use for invalid pixels
)
GetPixelElevation
public GM_Error_t32 GetPixelElevation(int aRow, //Y coord of pixel (0 is topmost)int aCol, //X coord of pixel (0 is leftmost)out float aElev //Elevation at location in meters
)public static GM_Error_t32 GetPixelElevation(GM_Layer_t aLayer, //Layer to get elevation fromint aRow, //Y coord of pixel (0 is topmost)int aCol, //X coord of pixel (0 is leftmost)out float aElev //Elevation at location in meters
)
GetPixelElevationRow
public GM_Error_t32 GetPixelElevationRow(int aRow, //Y coord of pixel (0 is topmost)out float[] aElevRow, //Buffer to hold elevation values for row in metersfloat aInvalidVal //Value to use for invalid samples (i.e. -9999.9)
)public static GM_Error_t32 GetPixelElevationRow(GM_Layer_t aLayer, //Layer to get elevation fromint aRow, //Y coord of pixel (0 is topmost)out float[] aElevRow, //Buffer to hold elevation values for row in metersfloat aInvalidVal //Value to use for invalid samples (i.e. -9999.9)
)
GetPointFeature
public GM_PointFeature_t GetPointFeature(uint aIndex //Index of Point feature to retrieve
)
GetPointFeatureEx
public GM_PointFeature_t GetPointFeatureEx(uint aIndex, //Index of Point feature to retrieveGM_GetFeatureFlags_t32 aFlags, //Flags for fetching featureObject aReserved //Reserved for future use, must be NULL
)
IsFeatureDeleted
public GM_Error_t32 IsFeatureDeleted(GM_FeatureClassType_t8 aFeatureClassType, //Type of feature class (area, point, line)uint aFeatureIndex, //Index of feature in layerout bool aIsDeleted //Returns TRUE if marked as deleted, FALSE if not
)
LoadGenericAsciiTextLayer
public static GM_Layer_t LoadGenericAsciiTextLayer(string aFilename, //filename of ASCII file to loadGM_LoadFlags_t32 aLoadFlags, //load flagsGM_AsciiFormatInfo_t aFormatInfo, //optional format info (use NULL to prompt user)GM_Projection_t aProj //optional projection to use for file (use NULL to prompt user)
)
LoadLayer
public static GM_Layer_t LoadLayer(string aFilename, //The Path to the file to be loadedGM_LoadFlags_t32 aLoadFlags = 0 //Flags for load options
)
LoadOnlineLayer
public static GM_Layer_t LoadOnlineLayer(string aSourceName, //name of the TerraServer-USA theme or WMS source to load ("drg", "doq", etc.) or NULL to ask userGM_Rectangle_t aLatLonRect, //lat/lon rect to import (NULL to ask user)string aExtraLoadOptions //extra load options
)
LoadRectifiedLayer
public static GM_Layer_t LoadRectifiedLayer(string aFilename, //File to be loadedGM_LoadFlags_t32 aLoadFlags, //Flags to set load optionsGM_GroundControlPoint_t[] aGCPList, //(const GM_GroundControlPoint_t*) list of control points for layerGM_Projection_t aProj //projection of control points
)
RepositionLayer
public GM_Error_t32 RepositionLayer(GM_GroundControlPoint_t[] aGCPList, //new control points. Null to not modifyGM_Projection_t aProj //projection of control points
)
SetAreaFeatureClass
public GM_Error_t32 SetAreaFeatureClass(uint aFeatureIndex, //Index of feature in layerAreaFeatureClass_t16 aFeatureClass //New feature class to assign to feature
)
SetAreaFeatureDrawStyle
public GM_Error_t32 SetAreaFeatureDrawStyle(uint aFeatureIndex, //Index of feature in layerGM_AreaStyle_t aAreaStyle //New style to use for Area, pass null to restore default type-based stuff
)
SetAreaFeaturePointList
public GM_Error_t32 SetAreaFeaturePointList(uint aFeatureIndex, //Index of feature in layeruint aHoleIndex, //Index of hole to apply locations to (0 for main parent area, 1 for first hole, etc.)GM_Point_t[] aPointList, //New list of points for areabool aPosInLayerCoords //Are the position in the layer coordinate system or the current coordinate system
)
SetAreaFeaturePointListEx
public GM_Error_t32 SetAreaFeaturePointListEx(uint aFeatureIndex, //Index of area in layeruint aHoleIndex, //Index of hole to apply locations to (0 for main parent area, 1 for first hole, etc.)GM_Point_t[] aPointList, //(const GM_Point_t*) New list of points for areabool aPosInLayerCoords, //Are the position in the layer coordinate system or the current coordinate systemfloat[] aElevList //Per-vertex elevations for area feature, or NULL for none
)
SetCodePage
public GM_Error_t32 SetCodePage(int aCodePage //Code page to use (-1 for not set, 0 for current system, CP_UTF8 for UTF-8, or normal code page, like 1252, 936, etc.)
)
SetFeatureAttrList
public GM_Error_t32 SetFeatureAttrList(GM_FeatureClassType_t8 aFeatureClassType, //Type of feature class (area, point, line)uint aFeatureIndex, //Index of feature in layerGM_AttrValue_t[] aAttrList //New list of attributes to associate with feature
)
SetFeatureDelete
public GM_Error_t32 SetFeatureDelete(GM_FeatureClassType_t8 aFeatureClassType, //Type of feature class (area, point, line)uint aFeatureIndex, //Index of feature in layerbool Delete //Use TRUE to mark as deleted, FALSE to clear delete flag
)
SetFeatureDescription
public GM_Error_t32 SetFeatureDescription(GM_FeatureClassType_t8 aFeatureClassType, //Type of feature class (area, point, line)uint aFeatureIndex, //Index of feature in layerstring aDesc //New description for feature (NULL to reset to default)
)
SetFeatureLabel
public GM_Error_t32 SetFeatureLabel(GM_FeatureClassType_t8 aFeatureClassType, //Type of feature class (area, point, line)uint aFeatureIndex, //Index of feature in layerstring aLabel //New display label for feature
)
SetLayerDescription
public GM_Error_t32 SetLayerDescription(string aDesc //Description to use (pass NULL to restore default)
)
SetLayerElevationAttribute
public GM_Error_t32 SetLayerElevationAttribute(string aAttrName, //Name of attribute to use for elevationsuint aReserved //Reserved value for future expansion (must be zero)
)
SetLayerElevationUnits
public GM_Error_t32 SetLayerElevationUnits(GM_ElevUnits_t8 aElevUnits //Elevation units to interpret values as
)
SetLayerEnabled
public GM_Error_t32 SetLayerEnabled(bool aEnable //Enable or disable the layer
)
SetLayerHeightAttribute
public GM_Error_t32 SetLayerHeightAttribute(string aAttrName, //Name of attribute to use for heightuint aReserved //Reserved value for future expansion (must be zero)
)
SetLayerHeightUnits
public GM_Error_t32 SetLayerHeightUnits(GM_ElevUnits_t8 aHeightUnits //Height units to interpret values as
)
SetLayerLabelAttribute
public GM_Error_t32 SetLayerLabelAttribute(string aAttrName, //Name of attribute to use for naming labelsuint aReserved //Reserved value for future expansion (must be zero)
)
SetLayerPalette
public GM_Error_t32 SetLayerPalette(GM_PaletteEntry_t[] aNewPalette, //pointer to list of palette entries to use for layer or NULL to reset palette to original paletteObject aReserved //reserved for future use, must be NULL
)
SetLayerUserData
public GM_Error_t32 SetLayerUserData(IntPtr aUserData //User data pointer/value to associate with layer
)
SetLayerUserText
public GM_Error_t32 SetLayerUserText(string aUserText //Text string to set as text for layer
)
SetLidarPoint
public GM_Error_t32 SetLidarPoint(ulong aPointIndex, //Index of Lidar point feature to updateGM_LidarPoint_t aLidarPoint, //Lidar point to updateObject aReserved //Reserved for future use, must be NULL
)
SetLineFeatureClass
public GM_Error_t32 SetLineFeatureClass(uint aFeatureIndex, //Index of feature in layerLineFeatureClass_t16 aFeatureClass //New feature class to assign to feature
)
SetLineFeatureDrawStyle
public GM_Error_t32 SetLineFeatureDrawStyle(uint aFeatureIndex, //Index of feature in layerGM_LineStyle_t aLineStyle //New style to use for line, pass null to restore default type-based stuff
)
SetLineFeaturePointList
public GM_Error_t32 SetLineFeaturePointList(uint aFeatureIndex, //Index of feature in layerGM_Point_t[] aPointList, //New list of points for linebool aPosInLayerCoords //Are the position in the layer coordinate system or the current coordinate system
)
SetLineFeaturePointListEx
public GM_Error_t32 SetLineFeaturePointListEx(uint aFeatureIndex, //Index of feature in layerGM_Point_t[] aPointList, //New list of points for linebool aPosInLayerCoords, //Are the position in the layer coordinate system or the current coordinate systemfloat[] aElevList //List of per-vertex elevations. Use NULL if no elevation list
)
SetPointFeatureClass
public GM_Error_t32 SetPointFeatureClass(uint aFeatureIndex, //Index of feature in layerPointFeatureClass_t16 aFeatureClass //New feature class to assign to feature
)
SetPointFeatureDrawStyle
public GM_Error_t32 SetPointFeatureDrawStyle(uint aFeatureIndex, //Index of feature in layerGM_PointStyle_t aPointStyle //New style to use for point, pass null to restore default type-based stuff
)
SetPointFeaturePosition
public GM_Error_t32 SetPointFeaturePosition(uint aFeatureIndex, //Index of feature in layerGM_Point_t aPosition, //New location of pointbool aPosInLayerCoords //Is the position in the layer coordinate system or the current coordinate system
)
ShowOptionsDialog
public GM_Error_t32 ShowOptionsDialog()
ToString
public override string ToString()
（5）操作符
| 操作符 | 描述 |
| Equality | 基于它们的句柄比较两个图层是否相等。 |
| Inequality | 基于它们的句柄比较两个图层是否不等。 |
Equality
public static bool operator ==(GM_Layer_t left, //The Left LayerGM_Layer_t right //The Right Layer
)
Inequality
public static bool operator !=(GM_Layer_t left, //The Left LayerGM_Layer_t right //The Right Layer
)
