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)

以你之姓@ 2023-10-11 13:35 29阅读 0赞

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Geoprocessor
                gp.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)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTUzMzkz_size_16_color_FFFFFF_t_70][]

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):

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTUzMzkz_size_16_color_FFFFFF_t_70 1][]

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Geoprocessor
                try
                {
                    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  NONE
                        gp.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_FID
                        union.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:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTUzMzkz_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTUzMzkz_size_16_color_FFFFFF_t_70 3][]

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