public static bool CreateSignaturefile(IRasterDataset pRasterDataset, int classCount, string gsgPath)
{
IGeoDataset pGeo = pRasterDataset as IGeoDataset;
IMultivariateOp pMultivarateOp = new RasterMultivariateOpClass();
// string gsgPath = "e:\\222.gsg";
pMultivarateOp.IsoCluster(pGeo, gsgPath, classCount);
return true;
}
/// <summary>
/// 生成signature文件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SC_CreateSampleFiles_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
if (SC_dataGridView.Rows.Count == 0)
{
return;
}
SaveFileDialog SaveSignatureFile = new SaveFileDialog();
SaveSignatureFile.Title = "生成Signature文件";
SaveSignatureFile.Filter = "样本文件|*.gsg";
if (SaveSignatureFile.ShowDialog() == DialogResult.OK)
{
IGeoDataset inputraster = SampleLayerCombox.Tag as IGeoDataset;
//在临时文件夹生成featureclass，根据featureclass生成signature文件
//判断临时文件夹下是否有重名
int changefilename = 0;
while (System.IO.File.Exists(Application.StartupPath + "\\temp\\TempSample" + changefilename + ".shp"))
{
changefilename++;
}
//新建featureclass字段
IFields pFields = new FieldsClass();
IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
IField pField = new FieldClass();
IFieldEdit pFieldEdit = pField as IFieldEdit;
pFieldEdit.Name_2 = "Shape";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
//设置geometry definition
IGeometryDef pGeometryDef = new GeometryDefClass();
IGeometryDefEdit pGeometryDefEdit = pGeometryDef as IGeometryDefEdit;
pGeometryDefEdit.GeometryType_2 = ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon;
pGeometryDefEdit.SpatialReference_2 = inputraster.SpatialReference;
pFieldEdit.GeometryDef_2 = pGeometryDef;
pFieldsEdit.AddField(pField);
IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory();
IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(Application.StartupPath + "\\temp", 0) as IFeatureWorkspace;
IFeatureClass featureclass = pFeatureWorkspace.CreateFeatureClass("TempSample" + changefilename + ".shp", pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");
//根据单元格tag中存储的多边形生成对应要素
for (int i = 0; i < SC_dataGridView.Rows.Count; i++)
{
IFeature feature = featureclass.CreateFeature();
feature.Shape = SC_dataGridView.Rows[i].Cells["color"].Tag as IPolygon;
feature.Store();
}
//生成signature文件
IGeoDataset Sampledataset = featureclass as IGeoDataset;
IMultivariateOp Multivariateop = new RasterMultivariateOpClass();
Multivariateop.CreateSignatures(inputraster, Sampledataset, SaveSignatureFile.FileName + ".gsg", true);
}
}
public static IRaster ClassifyMethod(IRasterDataset pRasterDataset, int classCount, string gsgPath)
{
IGeoDataset pGeoDatasetResult=null;
if (CreateSignaturefile(pRasterDataset, classCount, gsgPath))
{
IGeoDataset pGeo = pRasterDataset as IGeoDataset;
IMultivariateOp pMultivarateOp = new RasterMultivariateOpClass();
pGeoDatasetResult = pMultivarateOp.MLClassify(pGeo, gsgPath, false, esriGeoAnalysisAPrioriEnum.esriGeoAnalysisAPrioriEqual, Type.Missing, Type.Missing);
}
return (IRaster)pGeoDatasetResult;
}
/*
*该方法通过纯粹的Arcobject的方式实现最大似然分类 *
*
* *
*/
private byte[] DoClassifyHandler(NameValueCollection boundVariables, JsonObject operationInput, string outputFormat, string requestProperties, out string responseProperties)
{
_logger.LogMessage(ServerLogger.msgType.infoDetailed, _soename + ".GetRasterStatistics", 8000, "request received");
if (!_supportRasterItemAccess)
throw new ArgumentException("The image service does not have a catalog and does not support this operation");
responseProperties = null;
long? objectID;
long? classCount;
//case insensitive
bool found = operationInput.TryGetAsLong("objectID", out objectID);
if (!found || (objectID == null))
throw new ArgumentNullException("ObjectID");
found = operationInput.TryGetAsLong("classnumber", out classCount);
if (!found || (objectID == null))
throw new ArgumentNullException("classnumber");
IRasterCatalogItem rasterCatlogItem = null;
try
{
rasterCatlogItem = _mosaicCatalog.GetFeature((int)objectID) as IRasterCatalogItem;
if (rasterCatlogItem == null)
{
_logger.LogMessage(ServerLogger.msgType.infoDetailed, _soename + ".GetRasterStatistics", 8000, "request finished with exception");
throw new ArgumentException("The input ObjectID does not exist");
}
}
catch
{
_logger.LogMessage(ServerLogger.msgType.infoDetailed, _soename + ".GetRasterStatistics", 8000, "request finished with exception");
throw new ArgumentException("The input ObjectID does not exist");
}
JsonObject result = new JsonObject();
string outputurl = "";
try
{
IRasterDataset pRasterDataSet = rasterCatlogItem.RasterDataset;
IGeoDataset pGeo = pRasterDataSet as IGeoDataset;
string inPath = @"D:\arcgisserver\directories\arcgisoutput\imageserver\test2_ImageServer";
string gsgname = System.DateTime.Now.ToString().Replace("/", "").Replace(":", "").Replace(" ", "") + ".gsg";
string gsgPath = System.IO.Path.Combine(inPath, gsgname);
bool bcreatesignaturefile = Classify.CreateSignaturefile(pRasterDataSet, Convert.ToInt32(classCount), gsgPath);
if (bcreatesignaturefile)
{
IMultivariateOp pMultivarateOp = new RasterMultivariateOpClass();
IGeoDataset pGeoDatasetResult = pMultivarateOp.MLClassify(pGeo, gsgPath, false, esriGeoAnalysisAPrioriEnum.esriGeoAnalysisAPrioriEqual, Type.Missing, Type.Missing);
IEnvelope pEnvelp = new EnvelopeClass();
string outurl = "http://localhost:6080/arcgis/rest/directories/arcgisoutput/imageserver/test2_ImageServer/";
pEnvelp.PutCoords(116.56075474, 40.29407147, 116.63105347, 40.34514666);
// string dd = ExportImage.ExportLayerImage((IRaster)pGeoDatasetResult, bbox, new string[] { "400", "400" }, outurl, fileDir);
outputurl = ExportImage.CreateJPEGFromActiveView((IRaster)pGeoDatasetResult, pEnvelp, outurl, inPath);
}
}
catch
{
}
result.AddString("url", outputurl);
return Encoding.UTF8.GetBytes(result.ToJson());
}