C# 基于AE的GIS二次开发空间分析缓冲区分析(Buffer) 相交(Intersect) 联合(Union)

调用GP工具实现空间分析的;

需引用命名空间:

using ESRI.ArcGIS.AnalysisTools;//添加引用 在Arcgis10.2\DeveloperKit10.2\DotNet\ToolBoxes
using ESRI.ArcGIS.Geoprocessor;//添加引用 在Arcgis10.2\DeveloperKit10.2\DotNet\

下面用到的几个方法:

//辅助私有方法/// <summary>/// 获取指定名称的矢量图层对象/// </summary>/// <param name="layerName"></param>/// <returns></returns>private static IFeatureLayer getFeatureLayer(IMapControlDefault mapControl,string layerName){ILayer layer;IGeoFeatureLayer featureLayer;for (int i = 0; i < mapControl.LayerCount; i++){layer = mapControl.get_Layer(i);if (layer != null && layer.Name == layerName){featureLayer = layer as IGeoFeatureLayer;return featureLayer;}}return null;}//获取指定路径下得shp要素public static IFeatureLayer GetLayerFromPathShp(string path){try{IWorkspaceFactory workspcFac = new ShapefileWorkspaceFactoryClass();IFeatureWorkspace featureWorkspace;int index = path.LastIndexOf("\\");//获得文件路径string filePath = path.Substring(0, index);//获得文件名string fileName = path.Substring(index + 1);IFeatureLayer featureLayer = new FeatureLayerClass();//打开路径featureWorkspace = workspcFac.OpenFromFile(filePath, 0) as IFeatureWorkspace;//打开类要素featureLayer.FeatureClass = featureWorkspace.OpenFeatureClass(fileName);return featureLayer;}catch(Exception ex){MessageBoxEX.Show("提示","指定路径shp获取失败!"+ex);return null;}}

缓冲区分析:

static string appPath = Environment.CurrentDirectory + "\\shp\\";//路径 默认存debug里/// <summary>/// 单个缓冲区分析/// </summary>/// <param name="mapControl">map控件</param>/// <param name="name">文件名</param>/// <param name="distances">缓冲半径</param>public static void Buffer(IMapControlDefault mapControl,string distances,string name){string outPath = appPath+ ""+ name + distances + "_Buffer.shp";IFeatureLayer featureLayer = getFeatureLayer(mapControl, "台风路径");Geoprocessor gp = new Geoprocessor(); //初始化Geoprocessorgp.OverwriteOutput = true; //允许运算结果覆盖现有文件try{ESRI.ArcGIS.AnalysisTools.Buffer pBuffer = new ESRI.ArcGIS.AnalysisTools.Buffer(); //定义Buffer工具pBuffer.in_features = featureLayer; //输入对象，既可是IFeatureLayer对象，也可是完整文件路径如“D://data.shp”pBuffer.out_feature_class = outPath; //输出对象，一般是包含输出文件名的完整文件路径//设置缓冲区的大小，即可是带单位的具体数值，如0.1 Decimal Degrees；也可是输入图层中的某个字段，如“BufferLeng”pBuffer.buffer_distance_or_field = "" + distances + " Kilometers"; //缓冲区参数pBuffer.dissolve_option = "NONE"; //支持融合缓冲区重叠交叉部分gp.Execute(pBuffer, null); //执行缓冲区分析//添加结果到窗口string pFolder = System.IO.Path.GetDirectoryName(outPath); //得到字符串中文件夹位置string pFileName = System.IO.Path.GetFileName(outPath); //得到字符串中文件名字mapControl.AddShapeFile(pFolder, pFileName); //往地图控件里添加文件mapControl.ActiveView.Refresh(); //激活窗口刷新}catch (Exception ex){MessageBoxEX.Show("警告", "缓冲分析失败!" + ex.ToString());}}

联合:

 /// <summary>/// 两个的图层联合/// </summary>/// <param name="mapControl">map控件</param>/// <param name="name">文件名称</param>public static void Union(IMapControlDefault mapControl,string name){object sev = null;string outPath = appPath+""+name+"_Union.shp";//创建地理处理IBasicGeoprocessor pBGeop = new BasicGeoprocessorClass();//TODO://pBGeop.Union();Geoprocessor pGp = new Geoprocessor();pGp.OverwriteOutput = true; //允许运算结果覆盖现有文件，可无try{IFeatureLayer featureLayer = getFeatureLayer(mapControl, "台风路径");//使用AE中自带的缓冲区分析工具Union union = new Union();union.in_features = "H:\\Windows\\文档\\ArcGIS\\艾云尼.shp;H:\\Windows\\文档\\ArcGIS\\艾云尼5.shp;";union.out_feature_class = outPath;//输出路径union.join_attributes = "ALL";//连接属性union.gaps = "GAPS";pGp.Execute(union, null); //执行//添加结果到窗口string pFolder = System.IO.Path.GetDirectoryName(outPath); //得到字符串中文件夹位置string pFileName = System.IO.Path.GetFileName(outPath); //得到字符串中文件名字mapControl.AddShapeFile(pFolder, pFileName); //往地图控件里添加文件mapControl.ActiveView.Refresh(); //激活窗口刷新}catch {MessageBox.Show(pGp.GetMessages(ref sev));}}

受许可影响,输入图层只能两个叠加,不然会报异常错误!!!!!!!!!!!!!!!!!!!!!!! 调试很久才发现..........

就是 union.in_features 这个的赋值只能两个.(后面有改进,实现多个图层联合)

相交:

/// <summary>/// 图层相交/// </summary>/// <param name="mapControl"></param>/// <param name="layerName">叠加的图层名</param>/// <param name="name">文件名</param>/// <param name="distances">缓冲半径</param>public static void Intersect(IMapControlDefault mapControl,string layerName, string name, double[] distances){Geoprocessor pGp = new Geoprocessor();object sev = null;string outPath = appPath + "Intersect.shp";//输出路径try{IFeatureLayer featureLayer = getFeatureLayer(mapControl, layerName);//选取图层string str = Union(mapControl, name, distances);//默认分级缓冲区图层GpValueTableObjectClass pObject = new GpValueTableObjectClass();object p1 = featureLayer as object;//一个输入是获取的图层 object p2 = str as object;//一个输入直接路径获取的图层pObject.SetColumns(2);pObject.AddRow(ref p1);pObject.AddRow(ref p2);pGp.OverwriteOutput = true; //允许运算结果覆盖现有文件Intersect intsect = new Intersect();intsect.in_features = pObject;intsect.out_feature_class = outPath;intsect.join_attributes = "ALL";pGp.Execute(intsect, null); //执行//添加结果到窗口string pFolder = System.IO.Path.GetDirectoryName(outPath); //得到字符串中文件夹位置string pFileName = System.IO.Path.GetFileName(outPath); //得到字符串中文件名字mapControl.AddShapeFile(pFolder, pFileName); //往地图控件里添加文件UniqueValueRender(mapControl, "Intersect", "FID_Union");//着色mapControl.ActiveView.Refresh(); //激活窗口刷新}catch (Exception ex){MessageBoxEX.Show("警告", "图层相交失败!"+ pGp.GetMessages(ref sev));}}

以上三个方法实现一个简单的,分级缓冲区分析并分级着色,

大致步骤:先得到各个缓冲半径下的缓冲区图层→各个缓冲区图层进行联合(多个图层联合实现)→联合图层和想要的图层进行相交

最后大致如图(基于线要素缓冲的其他要素应该也可以,没尝试过):

上代码:

后面要用到的唯一值渲染色带

#region 生成唯一渲染色带/// <summary>/// 唯一值渲染图层/// </summary>/// <param name="pFeatureLayer">矢量图层</param>/// <param name="pUniqueFieldName">唯一值字段</param>public static void UniqueValueRender(IMapControlDefault mapControl,string layerName, string pUniqueFieldName){IFeatureLayer pFeatureLayer = getFeatureLayer(mapControl, layerName);//获取要素图层IGeoFeatureLayer pGeoLayer = pFeatureLayer as IGeoFeatureLayer;if (pGeoLayer == null) return;ITable pTable = pGeoLayer.FeatureClass as ITable;//得到属性表ICursor pCursor;IQueryFilter pQueryFilter = new QueryFilter();//查询pQueryFilter.AddField(pUniqueFieldName);pCursor = pTable.Search(pQueryFilter, true);//获取字段IEnumerator pEnumreator;//获取字段中各要素属性唯一值IDataStatistics pDataStatistics = new DataStatisticsClass();pDataStatistics.Field = pUniqueFieldName;//获取统计字段pDataStatistics.Cursor = pCursor;pEnumreator = pDataStatistics.UniqueValues;int fieldcount = pDataStatistics.UniqueValueCount;//唯一值个数，以此确定颜色带范围IUniqueValueRenderer pUniqueValueR = new UniqueValueRendererClass();pUniqueValueR.FieldCount = 1;//单值渲染pUniqueValueR.set_Field(0, pUniqueFieldName);//渲染字段IEnumColors pEnumColor = GetColorRgb(fieldcount).Colors;pEnumColor.Reset();while (pEnumreator.MoveNext()){string value = pEnumreator.Current.ToString();if (value != null){IColor pColor = pEnumColor.Next();ISymbol pSymbol = GetDefaultSymbol(pFeatureLayer.FeatureClass.ShapeType, pColor);//获取默认符号pUniqueValueR.AddValue(value, pUniqueFieldName, pSymbol);}}pGeoLayer.Renderer = pUniqueValueR as IFeatureRenderer;}public static void UniqueValueRender(string path, string pUniqueFieldName){IFeatureLayer pFeatureLayer = GetLayerFromPathShp(path);IGeoFeatureLayer pGeoLayer = pFeatureLayer as IGeoFeatureLayer;if (pGeoLayer == null) return;ITable pTable = pGeoLayer.FeatureClass as ITable;ICursor pCursor;IQueryFilter pQueryFilter = new QueryFilter();pQueryFilter.AddField(pUniqueFieldName);pCursor = pTable.Search(pQueryFilter, true);//获取字段IEnumerator pEnumreator;//获取字段中各要素属性唯一值IDataStatistics pDataStatistics = new DataStatisticsClass();pDataStatistics.Field = pUniqueFieldName;//获取统计字段pDataStatistics.Cursor = pCursor;pEnumreator = pDataStatistics.UniqueValues;int fieldcount = pDataStatistics.UniqueValueCount;//唯一值个数，以此确定颜色带范围IUniqueValueRenderer pUniqueValueR = new UniqueValueRendererClass();pUniqueValueR.FieldCount = 1;//单值渲染pUniqueValueR.set_Field(0, pUniqueFieldName);//渲染字段IEnumColors pEnumColor = GetColorRgb(fieldcount).Colors;pEnumColor.Reset();while (pEnumreator.MoveNext()){string value = pEnumreator.Current.ToString();if (value != null){IColor pColor = pEnumColor.Next();ISymbol pSymbol = GetDefaultSymbol(pFeatureLayer.FeatureClass.ShapeType, pColor);pUniqueValueR.AddValue(value, pUniqueFieldName, pSymbol);}}pGeoLayer.Renderer = pUniqueValueR as IFeatureRenderer;}/// <summary>/// 获取默认符号/// </summary>/// <param name="geometryType"></param>/// <returns></returns>private static ISymbol GetDefaultSymbol(esriGeometryType geometryType, IColor pColor){ISymbol pSymbol = null;switch (geometryType){case esriGeometryType.esriGeometryLine:case esriGeometryType.esriGeometryPolyline:ISimpleLineSymbol pLineSymbol = new SimpleLineSymbolClass();pLineSymbol.Color = pColor as IColor;pLineSymbol.Width = 3;pLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;pSymbol = pLineSymbol as ISymbol;break;case esriGeometryType.esriGeometryPoint:ISimpleMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbolClass();pMarkerSymbol.Color = pColor as IColor;pMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;pSymbol = pMarkerSymbol as ISymbol;break;case esriGeometryType.esriGeometryPolygon:ISimpleFillSymbol pFillSymbol = new SimpleFillSymbolClass();pFillSymbol.Color = pColor as IColor;pFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;pSymbol = pFillSymbol as ISymbol;break;}return pSymbol;}/// <summary>/// 构建色带/// </summary>/// <param name="size"></param>/// <returns></returns>private static IRandomColorRamp GetColorRamp(int size){IRandomColorRamp pRandomColorRamp = new RandomColorRampClass();pRandomColorRamp.StartHue = 0;pRandomColorRamp.EndHue = 60;pRandomColorRamp.MaxSaturation = 100;pRandomColorRamp.MinSaturation = 100;pRandomColorRamp.MaxValue = 100;pRandomColorRamp.MinValue = 100;pRandomColorRamp.Size = size;bool ok = true;pRandomColorRamp.CreateRamp(out ok);return pRandomColorRamp;}/// <summary>/// 辅助将.NET颜色转换为AE颜色/// </summary>/// <param name="pColor"></param>/// <returns></returns>private static IColor ConvertNETColorToAEColor(Color pColor){IRgbColor rgbColor = new RgbColorClass();rgbColor.Red = pColor.R;rgbColor.Blue = pColor.B;rgbColor.Green = pColor.G;return rgbColor as IColor;}/// <summary>/// 构建色带/// </summary>/// <param name="size">色带个数</param>/// <returns></returns>private static IAlgorithmicColorRamp GetColorRgb(int size){IColor fromColor = null, toColor = null;fromColor = ConvertNETColorToAEColor(Color.Yellow);//起始颜色toColor = ConvertNETColorToAEColor(Color.Red);//终止颜色IAlgorithmicColorRamp algCR = new AlgorithmicColorRampClass();algCR.Size = size;//生成渲染个数bool nFlag;//设置色带生成算法algCR.Algorithm = esriColorRampAlgorithm.esriLabLChAlgorithm;algCR.FromColor = fromColor; algCR.ToColor = toColor;algCR.CreateRamp(out nFlag);return algCR;}#endregion}

要点!!!!!!!!!!

 /// <summary>/// 返回缓冲shp的路径/// </summary>/// <param name="mapControl"></param>/// <param name="name"></param>/// <param name="distances">缓冲半径分级的值</param>/// <returns>返回路径 路径默认bin debug里 </returns>private static List<string> Buffer(IMapControlDefault mapControl, string name, double[] distances){List<string> path=new List<string>();string outPath = appPath;IFeatureLayer featureLayer = getFeatureLayer(mapControl, "台风路径");//本人默认了此图层的要素进行缓冲区分析,可根据需要自行修改 Geoprocessor gp = new Geoprocessor(); //初始化Geoprocessortry{for (int i = 0; i < distances.Length; i++){gp.OverwriteOutput = true; //允许运算结果覆盖现有文件ESRI.ArcGIS.AnalysisTools.Buffer pBuffer = new ESRI.ArcGIS.AnalysisTools.Buffer(); //定义Buffer工具pBuffer.in_features = featureLayer; //输入对象，既可是IFeatureLayer对象，也可是完整文件路径如“D://data.shp”string shpName = name + "" + distances[i].ToString().Trim() + "Buffer.shp";pBuffer.out_feature_class = outPath + shpName; //输出对象，一般是包含输出文件名的完整文件路径//设置缓冲区的大小，即可是带单位的具体数值，如0.1 Decimal Degrees；也可是输入图层中的某个字段，如“BufferLeng”pBuffer.buffer_distance_or_field = "" + distances[i].ToString().Trim() + " Kilometers"; //缓冲区参数pBuffer.dissolve_option = "NONE"; //支持融合缓冲区重叠交叉部分  NONEgp.Execute(pBuffer, null); //执行缓冲区分析path.Add(outPath + shpName);}return path;}catch (Exception ex){// Print geoprocessing execution error messages.MessageBoxEX.Show("警告", "缓冲分析失败!" + ex.ToString());return path;}}/// <summary>/// 大于两个的图层联合/// </summary>/// <param name="mapControl"></param>/// <param name="distances"></param>/// <param name="name">返回路径 相对路径  最终联合图层是Union.shp</param>public static string Union(IMapControlDefault mapControl, string name, double[] distances){List<string> pathBuffer = new List<string>();Geoprocessor pGp = new Geoprocessor();string outPath = appPath;try{IFeatureLayer featureLayer = getFeatureLayer(mapControl, "台风路径");string inputPath;pathBuffer = Buffer(mapControl, name, distances);for (int i = 0; i < pathBuffer.Count - 1; i++){if (i == 0){inputPath = "" + pathBuffer[i] + ";" + pathBuffer[i + 1] + ";";outPath = appPath + "Union" + i + ".shp";}else if (i == pathBuffer.Count - 2){inputPath = "" + outPath + ";" + pathBuffer[i + 1] + ";";outPath = appPath + "Union.shp";}else{inputPath = "" + outPath + ";" + pathBuffer[i + 1] + ";";outPath = appPath + "Union" + i + ".shp";}pGp.OverwriteOutput = true; //允许运算结果覆盖现有文件，可无 //使用AE中自带的缓冲区分析工具Union union = new Union();union.in_features = inputPath;union.out_feature_class = outPath;//输出路径union.join_attributes = "ONLY_FID";//连接属性 NO_FID ONLY_FIDunion.gaps = "GAPS";pGp.Execute(union, null); //执行}//string pFolder = System.IO.Path.GetDirectoryName(outPath); //得到字符串中文件夹位置//string pFileName = System.IO.Path.GetFileName(outPath); //得到字符串中文件名字//mapControl.AddShapeFile(pFolder, pFileName); //往地图控件里添加文件//mapControl.ActiveView.Refresh(); //激活窗口刷新return outPath;}catch (Exception ex){MessageBoxEX.Show("警告", "联合分析失败!" );return null;}}/// <summary>/// 图层相交/// </summary>/// <param name="mapControl"></param>/// <param name="layerName">叠加的图层名</param>/// <param name="name">文件名</param>/// <param name="distances">缓冲半径</param>public static void Intersect(IMapControlDefault mapControl,string layerName, string name, double[] distances){Geoprocessor pGp = new Geoprocessor();object sev = null;string outPath = appPath + "Intersect.shp";try{IFeatureLayer featureLayer = getFeatureLayer(mapControl, layerName);//选取图层string str = Union(mapControl, name, distances);//默认分级缓冲区图层GpValueTableObjectClass pObject = new GpValueTableObjectClass();object p1 = featureLayer as object;object p2 = str as object;pObject.SetColumns(2);pObject.AddRow(ref p1);pObject.AddRow(ref p2);pGp.OverwriteOutput = true; //允许运算结果覆盖现有文件Intersect intsect = new Intersect();intsect.in_features = pObject;intsect.out_feature_class = outPath;intsect.join_attributes = "ALL";pGp.Execute(intsect, null); //执行//添加结果到窗口string pFolder = System.IO.Path.GetDirectoryName(outPath); //得到字符串中文件夹位置string pFileName = System.IO.Path.GetFileName(outPath); //得到字符串中文件名字mapControl.AddShapeFile(pFolder, pFileName); //往地图控件里添加文件UniqueValueRender(mapControl, "Intersect", "FID_Union");//着色mapControl.ActiveView.Refresh(); //激活窗口刷新}catch (Exception ex){MessageBoxEX.Show("警告", "图层相交失败!"+ pGp.GetMessages(ref sev));//pGp.GetMessages(ref sev)将GP工具里报的错误显示出来}}

OVER!!!!!!!!!!!

最终效果:

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