private IRasterLayer SetViewShedRenderer(IRaster pInRaster, string sField, string sPath,double[,] dValue)
{
try
{
if (dValue == null)
return null;
if (sField.Trim() == "")
return null;
string path="";
string fileName="";
int iPath=sPath.LastIndexOf('\\');
path=sPath.Substring(0,iPath);
fileName=sPath.Substring(iPath+1,sPath.Length-iPath-1);
IRasterDescriptor pRD = new RasterDescriptorClass();
pRD.Create(pInRaster, null, sField);
IReclassOp pReclassOp = new RasterReclassOpClass();
IGeoDataset pGeodataset = pInRaster as IGeoDataset;
IRasterAnalysisEnvironment pEnv = pReclassOp as IRasterAnalysisEnvironment;
IWorkspaceFactory pWSF = new RasterWorkspaceFactoryClass();
IWorkspace pWS = pWSF.OpenFromFile(path, 0);
//pEnv.OutWorkspace = pWS;
//object objSnap = null;
//object objExtent = pGeodataset.Extent;
//pEnv.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, ref objExtent, ref objSnap);
//pEnv.OutSpatialReference = pGeodataset.SpatialReference;
IRasterBandCollection pRsBandCol = pGeodataset as IRasterBandCollection;
IRasterBand pRasterBand = pRsBandCol.Item(0);
pRasterBand.ComputeStatsAndHist();
IRasterStatistics pRasterStatistic = pRasterBand.Statistics;
double dMaxValue = pRasterStatistic.Maximum;
double dMinValue = pRasterStatistic.Minimum;
INumberRemap pNumRemap = new NumberRemapClass();
for (int i = 0; i < (dValue.Length/3); i++)
{
pNumRemap.MapRange(dValue[i, 0], dValue[i, 1], (Int32)dValue[i, 2]);
}
IRemap pRemap = pNumRemap as IRemap;
IGeoDataset pGeoDs = new RasterDatasetClass();
pGeoDs=pReclassOp.ReclassByRemap(pGeodataset, pRemap, false);
IRasterBandCollection pRasBandCol = (IRasterBandCollection)pGeoDs;
pRasBandCol.SaveAs(fileName, pWS, "GRID");//"IMAGINE Image"
IRaster pOutRaster =pGeoDs as IRaster;
IRasterLayer pRLayer = new RasterLayerClass();
pRLayer.CreateFromRaster(pOutRaster);
pRLayer.Name = fileName;
return pRLayer;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
return null;
}
}
//Ϊդ��ͼ�����ݽ���ͨ�ӷ�����ɫ
public static IRasterLayer SetViewShedRenderer(IRaster pInRaster, string sField, string sPath)
{
IRasterDescriptor pRD = new RasterDescriptorClass();
pRD.Create(pInRaster, new QueryFilterClass(), sField);
IReclassOp pReclassOp = new RasterReclassOpClass();
IGeoDataset pGeodataset = pInRaster as IGeoDataset;
IRasterAnalysisEnvironment pEnv = pReclassOp as IRasterAnalysisEnvironment;
IWorkspaceFactory pWSF = new RasterWorkspaceFactoryClass();
IWorkspace pWS = pWSF.OpenFromFile(sPath, 0);
pEnv.OutWorkspace = pWS;
object objSnap = null;
object objExtent = pGeodataset.Extent;
pEnv.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, ref objExtent, ref objSnap);
pEnv.OutSpatialReference = pGeodataset.SpatialReference;
IRasterLayer pRLayer = new RasterLayerClass();
IRasterBandCollection pRsBandCol = pGeodataset as IRasterBandCollection;
IRasterBand pRasterBand = pRsBandCol.Item(0);
pRasterBand.ComputeStatsAndHist();
IRasterStatistics pRasterStatistic = pRasterBand.Statistics;
double dMaxValue = pRasterStatistic.Maximum;
double dMinValue = pRasterStatistic.Minimum;
INumberRemap pNumRemap = new NumberRemapClass();
pNumRemap.MapRange(dMinValue, 0, 0);
pNumRemap.MapRange(0, dMaxValue, 1);
IRemap pRemap = pNumRemap as IRemap;
IRaster pOutRaster = pReclassOp.ReclassByRemap(pGeodataset, pRemap, false) as IRaster;
pRLayer.CreateFromRaster(pOutRaster);
return pRLayer;
}
//դ���ط���
private IRasterLayer calMValve(IRaster pInRaster, string sField)
{
try
{
if (sField.Trim() == "")
return null;
IRasterDescriptor pRD = new RasterDescriptorClass();
pRD.Create(pInRaster, null, sField);
IReclassOp pReclassOp = new RasterReclassOpClass();
IGeoDataset pGeodataset = pInRaster as IGeoDataset;
IRasterAnalysisEnvironment pEnv = pReclassOp as IRasterAnalysisEnvironment;
IRasterBandCollection pRsBandCol = pGeodataset as IRasterBandCollection;
IRasterBand pRasterBand = pRsBandCol.Item(0);
pRasterBand.ComputeStatsAndHist();
IRasterStatistics pRasterStatistic = pRasterBand.Statistics;
double dMaxValue = pRasterStatistic.Maximum;
double dMinValue = pRasterStatistic.Minimum;
INumberRemap pNumRemap = new NumberRemapClass();
//m���������� ���¶�Ϊ 0-7.5; 7.5-12.5; 12.5-17.5; 17.5--22.5; >22.5;
//mֵ�ֱ�Ϊ�� 0.1;0.15;0.2;0.25,0.3
//��ֵ������100��
pNumRemap.MapRange(dMinValue, 7.5, 10);
pNumRemap.MapRange(7.5, 12.5, 15);
pNumRemap.MapRange(12.5, 17.5, 20);
pNumRemap.MapRange(17.5, 22.5, 25);
pNumRemap.MapRange(22.5, dMaxValue, 30);
IRemap pRemap = pNumRemap as IRemap;
IGeoDataset pGeoDs = new RasterDatasetClass();
pGeoDs = pReclassOp.ReclassByRemap(pGeodataset, pRemap, false);
IRaster pOutRaster = pGeoDs as IRaster;
IRasterLayer pRLayer = new RasterLayerClass();
pRLayer.CreateFromRaster(pOutRaster);
return pRLayer;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
return null;
}
}
private IRasterLayer SetViewShedRenderer(IRaster pInRaster, string sField, string sPath, double[,] dValue)
{
try
{
if (dValue == null)
{
return(null);
}
if (sField.Trim() == "")
{
return(null);
}
string path = "";
string fileName = "";
int iPath = sPath.LastIndexOf('\\');
path = sPath.Substring(0, iPath);
fileName = sPath.Substring(iPath + 1, sPath.Length - iPath - 1);
IRasterDescriptor pRD = new RasterDescriptorClass();
pRD.Create(pInRaster, null, sField);
IReclassOp pReclassOp = new RasterReclassOpClass();
IGeoDataset pGeodataset = pInRaster as IGeoDataset;
IRasterAnalysisEnvironment pEnv = pReclassOp as IRasterAnalysisEnvironment;
IWorkspaceFactory pWSF = new RasterWorkspaceFactoryClass();
IWorkspace pWS = pWSF.OpenFromFile(path, 0);
//pEnv.OutWorkspace = pWS;
//object objSnap = null;
//object objExtent = pGeodataset.Extent;
//pEnv.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, ref objExtent, ref objSnap);
//pEnv.OutSpatialReference = pGeodataset.SpatialReference;
IRasterBandCollection pRsBandCol = pGeodataset as IRasterBandCollection;
IRasterBand pRasterBand = pRsBandCol.Item(0);
pRasterBand.ComputeStatsAndHist();
IRasterStatistics pRasterStatistic = pRasterBand.Statistics;
double dMaxValue = pRasterStatistic.Maximum;
double dMinValue = pRasterStatistic.Minimum;
INumberRemap pNumRemap = new NumberRemapClass();
for (int i = 0; i < (dValue.Length / 3); i++)
{
pNumRemap.MapRange(dValue[i, 0], dValue[i, 1], (Int32)dValue[i, 2]);
}
IRemap pRemap = pNumRemap as IRemap;
IGeoDataset pGeoDs = new RasterDatasetClass();
pGeoDs = pReclassOp.ReclassByRemap(pGeodataset, pRemap, false);
IRasterBandCollection pRasBandCol = (IRasterBandCollection)pGeoDs;
pRasBandCol.SaveAs(fileName, pWS, "GRID");//"IMAGINE Image"
IRaster pOutRaster = pGeoDs as IRaster;
IRasterLayer pRLayer = new RasterLayerClass();
pRLayer.CreateFromRaster(pOutRaster);
pRLayer.Name = fileName;
return(pRLayer);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
return(null);
}
}
//拉伸到灰度图像
private bool stretchToGrayImage(IRaster pSrcRaster, string szOutputFilename, double dbMinThreshold = 0.02, double dbMaxThreshold = 0.98)
{
try
{
if (pSrcRaster == null || szOutputFilename == null)
{
return(false);
}
//深拷贝
IClone pSrcClone = pSrcRaster as IClone;
IClone pDstClone = pSrcClone.Clone();
IRaster pDstRaster = pDstClone as IRaster;
IRaster2 pDstRaster2 = pDstRaster as IRaster2;
IRasterProps pRasterProps = pDstRaster as IRasterProps;
//原始统计信息
bool bFlag = false;
IRasterBand pRasterBand = (pDstRaster as IRasterBandCollection).Item(0);
pRasterBand.HasStatistics(out bFlag);
if (!bFlag)
{
pRasterBand.ComputeStatsAndHist();
}
//得到原始栅格影像的最大最小值和步长
double dbSrcMaxValue = pRasterBand.Statistics.Maximum;
double dbSrcMinValue = pRasterBand.Statistics.Minimum;
double dbSrcStep = (dbSrcMaxValue - dbSrcMinValue) / 256;
double dbStretchMaxValue = pRasterBand.Statistics.Maximum;
double dbStretchMinValue = pRasterBand.Statistics.Minimum;
#region 灰度映射，利用重分类来做
//第一次重分类
IReclassOp reclassOp = new RasterReclassOpClass();
INumberRemap numberRemap = new NumberRemapClass();
for (int i = 0; i < 256; i++)
{
numberRemap.MapRange(dbSrcMinValue + i * dbSrcStep, dbStretchMinValue + (i + 1) * dbSrcStep, i);
}
IRaster pRasterTemp = reclassOp.ReclassByRemap((IGeoDataset)(pDstRaster2.RasterDataset), (IRemap)numberRemap, true) as IRaster;
IRaster2 pRasterTemp2 = pRasterTemp as IRaster2;
IRasterProps pRasterTempProps = pRasterTemp as IRasterProps;
//得到属性表
IRasterDatasetEdit3 pRasterDatasetEdit3 = pRasterTemp2.RasterDataset as IRasterDatasetEdit3;
pRasterDatasetEdit3.ComputeStatisticsHistogram(1, 1, null, true);
IRasterBand rasterBand = (pRasterTempProps as IRasterBandCollection).Item(0);
IRasterHistogram rasterHistogram = rasterBand.Histogram;
IRasterStatistics rasterStatistics = rasterBand.Statistics;
double[] pHistogramCount = (double[])rasterHistogram.Counts;
int nCurrentCount = 0;
int nIndex = 0;
int nPixelCount = 0;//pRasterProps.Width * pRasterProps.Height;
//double dSum = 0.0;
for (int i = 0; i < 256; i++)
{
nPixelCount += (int)pHistogramCount[i];
}
//得到拉伸的最大最小值
while (Convert.ToDouble(nCurrentCount) / nPixelCount < dbMinThreshold)
{
nCurrentCount += Convert.ToInt32(pHistogramCount[nIndex++]);
}
dbStretchMinValue = nIndex * dbSrcStep + dbSrcMinValue;
while (Convert.ToDouble(nCurrentCount) / nPixelCount < dbMaxThreshold)
{
nCurrentCount += Convert.ToInt32(pHistogramCount[nIndex++]);
}
dbStretchMaxValue = nIndex * dbSrcStep + dbSrcMinValue;
dbSrcStep = (dbStretchMaxValue - dbStretchMinValue) / 256;
#endregion
#region 拉伸
INumberRemap numberRemapForStretch = new NumberRemapClass();
numberRemapForStretch.MapRange(dbSrcMinValue, dbStretchMinValue + dbSrcStep, 0);
for (int i = 1; i < 255; i++)
{
numberRemapForStretch.MapRange(dbStretchMinValue + i * dbSrcStep, dbStretchMinValue + (i + 1) * dbSrcStep, i);
}
numberRemapForStretch.MapRange(dbStretchMinValue + 255 * dbSrcStep, dbSrcMaxValue, 255);
IRaster pRasterStretch = reclassOp.ReclassByRemap((IGeoDataset)((pDstRaster as IRaster2).RasterDataset), (IRemap)numberRemapForStretch, true) as IRaster;
IRasterProps pRasterStretchProps = pRasterStretch as IRasterProps;
#region 注释代码
////拉伸
//IPixelBlock3 pixelBlock3 = null;
//IRasterCursor rasterCursor = (pDstRaster as IRaster2).CreateCursorEx(null);//null时为128*128
//do
//{
// pixelBlock3 = rasterCursor.PixelBlock as IPixelBlock3;
// int nWidth = pixelBlock3.Width;
// int nHeight = pixelBlock3.Height;
// System.Array pixels = (System.Array)pixelBlock3.get_PixelData(0);
// for (int m = 0; m < nWidth; m++)
// {
// for (int n = 0; n < nHeight; n++)
// {
// double dbSrcValue = Convert.ToDouble(pixels.GetValue(m, n));
// if (double.IsNaN(dbSrcValue) || dbSrcValue == dbNoDataValue)
// continue;
// if (dbSrcValue >= dbStretchMaxValue)
// pixels.SetValue(255, m, n);
// else if (dbSrcValue <= dbStretchMinValue)
// pixels.SetValue(0, m, n);
// else
// {
// byte dbDstValue = Convert.ToByte((dbSrcValue - dbStretchMinValue) / (dbStretchMaxValue - dbStretchMinValue) * 255);
// pixels.SetValue(dbDstValue, m, n);
// }
// }
// }
// pixelBlock3.set_PixelData(0, (System.Array)pixels);
// //修改数据
// pRasterEdit.Write(rasterCursor.TopLeft, pixelBlock3 as IPixelBlock);
// pRasterEdit.Refresh();
//} while (rasterCursor.Next() == true);
#endregion
#endregion
#region 存储数据
IWorkspaceFactory pWorkspaceFactory = new RasterWorkspaceFactoryClass();
IWorkspace inmemWor = pWorkspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(szOutputFilename), 0);
pRasterStretchProps.PixelType = rstPixelType.PT_UCHAR;
ISaveAs2 pSaveAs = pRasterStretchProps as ISaveAs2;
if (pSaveAs == null)
{
return(false);
}
IRasterStorageDef pRSDef = new RasterStorageDefClass();
IRasterDataset pDataset = pSaveAs.SaveAsRasterDataset(System.IO.Path.GetFileName(szOutputFilename), inmemWor, "TIFF", pRSDef);
(pDataset as IRasterDataset3).Refresh();
//IRasterEdit pRasterEdit = pDstRaster as IRasterEdit;
IRasterEdit pRasterTempEdit = pRasterTemp as IRasterEdit;
System.Runtime.InteropServices.Marshal.ReleaseComObject(pRasterTempEdit);
IRasterEdit pRasterStretchEdit = pRasterStretch as IRasterEdit;
System.Runtime.InteropServices.Marshal.ReleaseComObject(pRasterStretchEdit);
#endregion
return(true);
}
catch (System.Exception ex)
{
MessageBox.Show(ex.Message);
return(false);
}
}
/// <summary>
/// 风险因素等级划分
/// </summary>
/// <param name="RasterWorkspace"></param>
/// <param name="roadEvalName"></param>
/// <returns></returns>
public static bool RaskCaulte(string RasterWorkspace, string roadEvalName)
{
IWorkspaceFactory rWorkspaceFactory = new RasterWorkspaceFactory();
IWorkspace SWorkspace = rWorkspaceFactory.OpenFromFile(RasterWorkspace, 0);
IRasterWorkspace rasterWorkspace = SWorkspace as IRasterWorkspace;
//栅格计算器 计算风险级数 先不要签你的三方协议 然后存储 表达式必须隔开
IMapAlgebraOp mapAlgebra = new RasterMapAlgebraOpClass();
IRasterDataset roadEvalRaster = rasterWorkspace.OpenRasterDataset(roadEvalName);
IGeoDataset geo1 = roadEvalRaster as IGeoDataset;
mapAlgebra.BindRaster(geo1, "EvalRaster");
IGeoDataset raskDataset = mapAlgebra.Execute("[EvalRaster]");//然后存储 表达式必须间隔开
//将生成的风险栅格重分类
//<0.2 一级：可能性小
//0.2-0.4 二级：可
//能性较小
//0.4-0.6 三级：可能性较大
//0.6-0.8 四级：可能性大
//>0.8 五级：可能性很大
// 输入：raskDataset
// 输出：geoDataset_result
IRasterBandCollection pRsBandCol = raskDataset as IRasterBandCollection;
IRasterBand pRasterBand = pRsBandCol.Item(0);
pRasterBand.ComputeStatsAndHist();
IRasterStatistics pRasterStatistic = pRasterBand.Statistics;
double dMaxValue = pRasterStatistic.Maximum;
double dMinValue = pRasterStatistic.Minimum;
IReclassOp pReclassOp = new RasterReclassOpClass();
INumberRemap pNumRemap = new NumberRemapClass();
//等级参数
List <double> raskRanges = new List <double>();
for (int n = 0; n < 5; n++)
{
raskRanges.Add(dMinValue + (dMaxValue - dMinValue) * n / 4);
}
for (int m = 0; m < 4; m++)
{
pNumRemap.MapRange(raskRanges[m], raskRanges[m + 1], m + 1);
}
IRemap pRemap = pNumRemap as IRemap;
IRaster pOutRaster = pReclassOp.ReclassByRemap(raskDataset, pRemap, false) as IRaster;
IRasterLayer rasterLayer = new RasterLayerClass();
rasterLayer.CreateFromRaster(pOutRaster);
if (rasterLayer != null)
{
rasterLayer.Name = roadEvalName;
for (int i = 0; i < MainFrom.m_mapControl.LayerCount; i++)
{
ILayer ComLayer = MainFrom.m_mapControl.get_Layer(i);
if (rasterLayer.Name == ComLayer.Name)
{
MainFrom.m_mapControl.Map.DeleteLayer(ComLayer);
}
}
Common.funColorForRaster_Classify(rasterLayer, 4);
IEnvelope envelope = rasterLayer.AreaOfInterest;
MainFrom.m_mapControl.ActiveView.Extent = envelope;//缩放至图层
}
return(true);
}
/// <summary>
/// 生成风险等级栅格
/// </summary>
/// <param name="roadEvalName"></param>
/// <param name="rains"></param>
/// <param name="saveWorkspace"></param>
/// <returns></returns>
public bool RoadRaskCaulte(string roadEvalName, double rains, string saveWorkspace)
{
#region 备份
// IWorkspaceFactory rWorkspaceFactory = new RasterWorkspaceFactory();
// IWorkspace SWorkspace = rWorkspaceFactory.OpenFromFile(saveWorkspace, 0);
// IRasterWorkspace rasterWorkspace = SWorkspace as IRasterWorkspace;
// //栅格计算器 计算风险级数 先不要签你的三方协议 然后存储 表达式必须隔开
// IMapAlgebraOp mapAlgebra = new RasterMapAlgebraOpClass();
// IRasterDataset roadEvalRaster = OpenRasterDataSet(rasterWorkspace, roadEvalName);
// IGeoDataset geo1 = roadEvalRaster as IGeoDataset;
// mapAlgebra.BindRaster(geo1, "EvalRaster");
// IGeoDataset raskDataset = mapAlgebra.Execute("[EvalRaster] * 10 / 25");//然后存储 表达式必须间隔开
// //将生成的风险栅格重分类
// //<0.2 一级：可能性小
// //0.2-0.4 二级：可
// //能性较小
// //0.4-0.6 三级：可能性较大
// //0.6-0.8 四级：可能性大
// //>0.8 五级：可能性很大
// // 输入：raskDataset
//// 输出：geoDataset_result
// IRasterBandCollection pRsBandCol = raskDataset as IRasterBandCollection;
// IRasterBand pRasterBand = pRsBandCol.Item(0);
// pRasterBand.ComputeStatsAndHist();
// IRasterStatistics pRasterStatistic = pRasterBand.Statistics;
// double dMaxValue = pRasterStatistic.Maximum;
// double dMinValue = pRasterStatistic.Minimum;
// IReclassOp pReclassOp = new RasterReclassOpClass();
// INumberRemap pNumRemap = new NumberRemapClass();
// //pNumRemap.MapRange(dMinValue, 0.2, 1);
// //pNumRemap.MapRange(0.2, 0.4, 2);
// //pNumRemap.MapRange(0.4, 0.6, 3);
// //pNumRemap.MapRange(0.6, dMaxValue, 4);
// //pNumRemap.MapRangeToNoData(-1000, 0);
// //pNumRemap.MapRange(0.8, 1000, 5);
// pNumRemap.MapRange(dMinValue,0.2, 0);
// pNumRemap.MapRange(0.2, 0.4, 1);
// pNumRemap.MapRange(0.4, 0.6, 2);
// pNumRemap.MapRange(0.6, 0.8, 3);
// pNumRemap.MapRange(0.8, dMaxValue, 4);
// IRemap pRemap = pNumRemap as IRemap;
// //IGeoDataset geoDataset_result = pReclassOp.ReclassByRemap(raskDataset, pRemap, true);
// IRaster pOutRaster = pReclassOp.ReclassByRemap(raskDataset, pRemap, false) as IRaster;
// IRasterLayer rasterLayer = new RasterLayerClass();
// rasterLayer.CreateFromRaster(pOutRaster);
// if (rasterLayer != null)
// {
// //string fullPath = Common.RoadshapePath+"道路.shp";
// rasterLayer.Name = "公路风险";
// Boolean IsEqual = false;
// //int Position = fullPath.LastIndexOf("\\");
// ////文件目录
// //string FilePath = fullPath.Substring(0, Position);
// //string ShpName = fullPath.Substring(Position + 1);
// //IWorkspaceFactory pWF;
// //pWF = new ShapefileWorkspaceFactory();
// //IFeatureWorkspace pFWS;
// //pFWS = (IFeatureWorkspace)pWF.OpenFromFile(FilePath, 0);
// //IFeatureClass pFClass;
// //pFClass = pFWS.OpenFeatureClass(ShpName);
// //IFeatureLayer pFLayer = new FeatureLayer();
// //pFLayer.FeatureClass = pFClass;
// for (int i = 0; i < MainFrom.m_mapControl.LayerCount;i++ )
// {
// ILayer ComLayer=MainFrom.m_mapControl.get_Layer(i);
// if (rasterLayer.Name == ComLayer.Name)
// {
// IsEqual = true;
// }
// }
// if (!IsEqual)
// {
// //MainFrom.m_mapControl.AddLayer((ILayer)pFLayer);
// MainFrom.m_mapControl.AddLayer(rasterLayer);
// IEnvelope envelope = rasterLayer.AreaOfInterest;
// MainFrom.m_mapControl.ActiveView.Extent = envelope;//缩放至图层
// }
// }
// return true;
#endregion
IWorkspaceFactory rWorkspaceFactory = new RasterWorkspaceFactory();
IWorkspace SWorkspace = rWorkspaceFactory.OpenFromFile(saveWorkspace, 0);
IRasterWorkspace rasterWorkspace = SWorkspace as IRasterWorkspace;
//栅格计算器 计算风险级数 先不要签你的三方协议 然后存储 表达式必须隔开
IMapAlgebraOp mapAlgebra = new RasterMapAlgebraOpClass();
IRasterDataset roadEvalRaster = OpenRasterDataSet(rasterWorkspace, roadEvalName);
IGeoDataset geo1 = roadEvalRaster as IGeoDataset;
mapAlgebra.BindRaster(geo1, "EvalRaster");
IGeoDataset raskDataset = mapAlgebra.Execute("[EvalRaster] * " + rains + " / 25");//然后存储 表达式必须间隔开
//将生成的风险栅格重分类
//<0.2 一级：可能性小
//0.2-0.4 二级：可
//能性较小
//0.4-0.6 三级：可能性较大
//0.6-0.8 四级：可能性大
//>0.8 五级：可能性很大
// 输入：raskDataset
// 输出：geoDataset_result
IRasterBandCollection pRsBandCol = raskDataset as IRasterBandCollection;
IRasterBand pRasterBand = pRsBandCol.Item(0);
pRasterBand.ComputeStatsAndHist();
IRasterStatistics pRasterStatistic = pRasterBand.Statistics;
double dMaxValue = pRasterStatistic.Maximum;
double dMinValue = pRasterStatistic.Minimum;
IReclassOp pReclassOp = new RasterReclassOpClass();
INumberRemap pNumRemap = new NumberRemapClass();
IDictionary <int, RoadRange> roadRanges = this.roadRiskConfig.GetRoadRiskLevelFromConfig();
foreach (var v in roadRanges)
{
pNumRemap.MapRange(v.Value.MinValue, v.Value.MaxValue, v.Key);
}
IRemap pRemap = pNumRemap as IRemap;
//IGeoDataset geoDataset_result = pReclassOp.ReclassByRemap(raskDataset, pRemap, true);
IRaster pOutRaster = pReclassOp.ReclassByRemap(raskDataset, pRemap, false) as IRaster;
IRasterLayer rasterLayer = new RasterLayerClass();
rasterLayer.CreateFromRaster(pOutRaster);
if (rasterLayer != null)
{
rasterLayer.Name = "公路风险";
for (int i = 0; i < MainFrom.m_mapControl.LayerCount; i++)
{
ILayer ComLayer = MainFrom.m_mapControl.get_Layer(i);
if (rasterLayer.Name == ComLayer.Name)
{
MainFrom.m_mapControl.Map.DeleteLayer(ComLayer);
}
}
Common.funColorForRaster_Classify(rasterLayer, roadRanges.Count);
IEnvelope envelope = rasterLayer.AreaOfInterest;
MainFrom.m_mapControl.ActiveView.Extent = envelope;//缩放至图层
}
return(true);
}