/// <summary>
/// generate flatarea poylgons for the specified survey using the specified raster
/// </summary>
public static void GenerateFlatAreaPolygons(int SurveyID, double MinSlope, double MaxSlope,
IGeoDataset ClippedRasterDS, ref string ErrorMessage)
{
ESRI.ArcGIS.Geoprocessing.IGeoProcessorResult GeoResult = null;
ESRI.ArcGIS.Geoprocessing.IGeoProcessor ThisGeoProcessor = null;
ESRI.ArcGIS.GeoAnalyst.IRasterDescriptor ThisRasterDescriptor;
ESRI.ArcGIS.GeoAnalyst.IConversionOp ThisConversionOp;
IGeoDataset FloatRasterDS = null, IntRasterDS = null;
ESRI.ArcGIS.esriSystem.IVariantArray GPParams;
ESRI.ArcGIS.GeoAnalyst.ISurfaceOp ThisSurfaceOp;
ESRI.ArcGIS.SpatialAnalyst.IMathOp ThisMathOp;
IFeatureClass TempFlatAreasPolyFC = null, TempAggregateFC = null,
TempAggregateClipFC = null, BoundaryFC = null, FlatAreasFC = null;
IQueryFilter ThisQueryFilter;
IFeatureCursor FlatAreasCursor, TempAggregateClipCursor;
IFeatureBuffer FlatAreasFBuffer;
IFeature TempAggregateClipFeature;
string TempFlatAreasPolyFCName, TempAggregateFCName, InternalErrors = "", TempClipFCName;
object zFactor;
NPSGlobal NPS;
int SurveyIDIndex;
TempClipFCName = "NPS_TEMP_ClippedFC";
TempAggregateFCName = "NPS_TEMP_FlatAreasAggrFC";
TempFlatAreasPolyFCName = "NPS_TEMP_FlatAreasFC";
NPS = NPSGlobal.Instance;
zFactor = 1;
BoundaryFC = Util.GetFeatureClass(NPS.LYR_SURVEY_BOUNDARY, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false) return;
FlatAreasFC = Util.GetFeatureClass(NPS.LYR_FLAT_AREAS, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false) return;
SurveyIDIndex = FlatAreasFC.FindField("SurveyID");
if (SurveyIDIndex == -1)
{
ErrorMessage = "Could not find a SurveyID field on the " + ((IDataset)FlatAreasFC).Name + " FeatureClass.";
return;
}
Util.SetProgressMessage("Deleting old temp files");
Util.DeleteDataset(TempFlatAreasPolyFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempAggregateFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempClipFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempAggregateFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
Util.DeleteDataset(TempClipFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
ThisSurfaceOp = new ESRI.ArcGIS.GeoAnalyst.RasterSurfaceOpClass();
try
{
Util.SetProgressMessage("Computing slope values from DEM");
FloatRasterDS = ThisSurfaceOp.Slope(ClippedRasterDS,
ESRI.ArcGIS.GeoAnalyst.esriGeoAnalysisSlopeEnum.esriGeoAnalysisSlopeDegrees, ref zFactor);
}
catch (Exception ex)
{
ErrorMessage = "Error occured while converting DEM evelation values to float slope values. " + ex.Message;
return;
}
try
{
Util.SetProgressMessage("Converting DEM values to integers");
ThisMathOp = new ESRI.ArcGIS.SpatialAnalyst.RasterMathOpsClass();
IntRasterDS = ThisMathOp.Int(FloatRasterDS);
}
catch (Exception ex)
{
ErrorMessage = "Error occured while converting DEM float slope values to slope integer values. " + ex.Message;
return;
}
try
{
Util.SetProgressMessage("Building flat area polygons from DEM");
ThisQueryFilter = new QueryFilterClass();
ThisQueryFilter.WhereClause = " Value >= " + MinSlope + " AND Value <= " + MaxSlope;
ThisRasterDescriptor = new ESRI.ArcGIS.GeoAnalyst.RasterDescriptorClass();
ThisRasterDescriptor.Create(IntRasterDS as IRaster, ThisQueryFilter, "Value");
ThisConversionOp = new ESRI.ArcGIS.GeoAnalyst.RasterConversionOpClass();
TempFlatAreasPolyFC = ThisConversionOp.RasterDataToPolygonFeatureData(ThisRasterDescriptor as IGeoDataset,
NPS.Workspace, TempFlatAreasPolyFCName, true) as IFeatureClass;
}
catch (Exception ex)
{
ErrorMessage = "Error occured while generating a FeatureClass of flat "
+ "areas from the default DEM file. " + ex.Message;
return;
}
try
{
Util.SetProgressMessage("Aggregating flat area polygons");
ThisGeoProcessor = new ESRI.ArcGIS.Geoprocessing.GeoProcessor();
GPParams = new ESRI.ArcGIS.esriSystem.VarArrayClass();
GPParams.Add(System.IO.Path.Combine(NPS.DatabasePath, TempFlatAreasPolyFCName));
GPParams.Add(System.IO.Path.Combine(NPS.DatabasePath, TempAggregateFCName));
GPParams.Add("1 Meters");
GeoResult = ThisGeoProcessor.Execute("AggregatePolygons_management", GPParams, null);
}
catch (Exception ex)
{
ErrorMessage = string.Format("Geoprocessor error:\r\nTask:AggregatePolygons_management\r\n"
+ "Params:{0},{1},{2}\r\nException:{3}", System.IO.Path.Combine(NPS.DatabasePath, TempFlatAreasPolyFCName),
System.IO.Path.Combine(NPS.DatabasePath, TempAggregateFCName), "1 Meters", ex.Message);
ThisGeoProcessor = null;
return;
}
ThisGeoProcessor = null;
Util.DeleteLayerFromMap(TempAggregateFCName);
TempAggregateFC = Util.GetFeatureClass(TempAggregateFCName, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false)
{
ErrorMessage = "Could not find temporary FeatureClass " + TempAggregateFCName + ". " + ErrorMessage;
return;
}
Util.SetProgressMessage("Validating flat area polygons");
TempAggregateClipFC = Util.GP_Clip_analysis(TempClipFCName, TempAggregateFC, BoundaryFC, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false) return;
FlatAreasFBuffer = FlatAreasFC.CreateFeatureBuffer();
FlatAreasCursor = FlatAreasFC.Insert(true);
ThisQueryFilter = null;
ThisQueryFilter = new QueryFilterClass();
ThisQueryFilter.WhereClause = "SHAPE_AREA > 25000";
TempAggregateClipCursor = TempAggregateClipFC.Search(ThisQueryFilter, false);
Util.SetProgressMessage("Importing flat area polygons to Survey");
while ((TempAggregateClipFeature = TempAggregateClipCursor.NextFeature()) != null)
{
if (TempAggregateClipFeature.Shape == null) continue;
FlatAreasFBuffer.Shape = TempAggregateClipFeature.ShapeCopy;
FlatAreasFBuffer.set_Value(SurveyIDIndex, SurveyID);
FlatAreasCursor.InsertFeature(FlatAreasFBuffer);
}
TempAggregateClipCursor = null;
FlatAreasCursor = null;
Util.SetProgressMessage("Cleaning up temp files");
Util.DeleteDataset(TempFlatAreasPolyFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempAggregateFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempClipFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempAggregateFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
Util.DeleteDataset(TempClipFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
Util.CreateFillerPolygon(FlatAreasFC, SurveyID, ref InternalErrors);
}
/// <summary>
/// generate exlcuded area polygons for the specified survey and elevation
/// </summary>
public static void GenerateExcludedAreasPolygons(int SurveyID, int MaximumElevInFeet, bool IsAboveElevation,
IGeoDataset ClippedRasterDS, ref string ErrorMessage)
{
ESRI.ArcGIS.SpatialAnalyst.IMathOp ThisMathOp;
IGeoDataset IntRasterDS = null;
IQueryFilter ThisQueryFilter;
ESRI.ArcGIS.GeoAnalyst.IRasterDescriptor ThisRasterDescriptor;
ESRI.ArcGIS.Geoprocessing.IGeoProcessorResult GeoResult = null;
ESRI.ArcGIS.Geoprocessing.IGeoProcessor ThisGeoProcessor = null;
ESRI.ArcGIS.esriSystem.IVariantArray GPParams;
IFeatureClass NewElvPolyFC, BoundaryFC, ElvPolyFC;
ESRI.ArcGIS.GeoAnalyst.IConversionOp ThisConversionOp;
string TempElvFCName, TempAggFCName, InternalErrors = "", TempClipFCName;
IFeatureBuffer InsertBuffer;
IFeatureCursor InsertCursor, TempCursor;
IFeature TempFeature;
int ShapeAreaIndex;
double CurrentShapeArea, MaxShapeArea;
int SurveyIDIndex;
NPSGlobal NPS;
NPS = NPSGlobal.Instance;
TempElvFCName = "NPS_TEMP_TempElvPolyFCName";
TempAggFCName = "NPS_TEMP_TempElevationFC";
TempClipFCName = "NPS_TEMP_TempClipFCName";
ElvPolyFC = Util.GetFeatureClass(NPS.LYR_EXCLUDED_AREAS, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false) return;
BoundaryFC = Util.GetFeatureClass(NPS.LYR_SURVEY_BOUNDARY, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false) return;
SurveyIDIndex = ElvPolyFC.FindField("SurveyID");
if (SurveyIDIndex == -1)
{
ErrorMessage = "Could not find the SurveyID field on the Excluded Areas FeatureClass.";
return;
}
Util.SetProgressMessage("Deleting old temp files");
Util.DeleteDataset(TempElvFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempClipFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempAggFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempClipFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
Util.DeleteDataset(TempAggFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
try
{
Util.SetProgressMessage("Converting DEM values to integers");
ThisMathOp = new ESRI.ArcGIS.SpatialAnalyst.RasterMathOpsClass();
IntRasterDS = ThisMathOp.Int(ClippedRasterDS);
}
catch (Exception ex)
{
ErrorMessage = "Error occured while converting DEM float slope values to slope integer values. " + ex.Message;
return;
}
try
{
Util.SetProgressMessage("Building excluded area polygons from DEM");
//determine which values to exclude
ThisQueryFilter = new QueryFilterClass();
if (IsAboveElevation)
ThisQueryFilter.WhereClause = " Value >= " + MaximumElevInFeet;
else
ThisQueryFilter.WhereClause = " Value <= " + MaximumElevInFeet;
ThisRasterDescriptor = new ESRI.ArcGIS.GeoAnalyst.RasterDescriptorClass();
ThisRasterDescriptor.Create(IntRasterDS as IRaster, ThisQueryFilter, "Value");
ThisConversionOp = new ESRI.ArcGIS.GeoAnalyst.RasterConversionOpClass();
NewElvPolyFC = ThisConversionOp.RasterDataToPolygonFeatureData(ThisRasterDescriptor as IGeoDataset,
NPS.Workspace, TempElvFCName, true) as IFeatureClass;
}
catch (Exception ex)
{
ErrorMessage = "Error occured while generating a FeatureClass of flat "
+ "areas from the default DEM file. " + ex.Message;
return;
}
try
{
Util.SetProgressMessage("Aggregating excluded area polygons");
ThisGeoProcessor = new ESRI.ArcGIS.Geoprocessing.GeoProcessor();
GPParams = new ESRI.ArcGIS.esriSystem.VarArrayClass();
GPParams.Add(System.IO.Path.Combine(NPS.DatabasePath, TempElvFCName));
GPParams.Add(System.IO.Path.Combine(NPS.DatabasePath, TempAggFCName));
GPParams.Add("1 Meters");
GeoResult = ThisGeoProcessor.Execute("AggregatePolygons_management", GPParams, null);
}
catch (Exception ex)
{
ErrorMessage = string.Format("Geoprocessor error:\r\nTask:AggregatePolygons_management\r\n"
+ "Params:{0},{1},{2}\r\nException:{3}", System.IO.Path.Combine(NPS.DatabasePath, TempElvFCName),
System.IO.Path.Combine(NPS.DatabasePath, TempAggFCName), "1 Meters", ex.Message);
ThisGeoProcessor = null;
return;
}
ThisGeoProcessor = null;
Util.DeleteLayerFromMap(TempAggFCName);
NewElvPolyFC = Util.GetFeatureClass(TempAggFCName, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false)
{
ErrorMessage = "Could not find temporary FeatureClass " + TempAggFCName + ". " + ErrorMessage;
return;
}
Util.SetProgressMessage("Validating excluded area polygons");
NewElvPolyFC = Util.GP_Clip_analysis(TempClipFCName, NewElvPolyFC, BoundaryFC, ref ErrorMessage);
if (string.IsNullOrEmpty(ErrorMessage) == false) return;
InsertBuffer = ElvPolyFC.CreateFeatureBuffer();
InsertCursor = ElvPolyFC.Insert(true);
ThisQueryFilter = null;
ThisQueryFilter = new QueryFilterClass();
TempCursor = NewElvPolyFC.Search(ThisQueryFilter, false);
ShapeAreaIndex = NewElvPolyFC.FindField(NewElvPolyFC.AreaField.Name);
MaxShapeArea = (double)Util.SafeConvert(Util.GetFirstRecordValue(BoundaryFC,
BoundaryFC.AreaField.Name, "SurveyID=" + SurveyID), typeof(double));
Util.SetProgressMessage("Importing excluded area polygons to Survey");
while ((TempFeature = TempCursor.NextFeature()) != null)
{
if (TempFeature.Shape == null) continue;
CurrentShapeArea = (double)Util.SafeConvert(TempFeature.get_Value(ShapeAreaIndex), typeof(double));
if ((CurrentShapeArea / MaxShapeArea) >= 0.95) continue;
InsertBuffer.Shape = TempFeature.ShapeCopy;
InsertBuffer.set_Value(SurveyIDIndex, SurveyID);
InsertCursor.InsertFeature(InsertBuffer);
}
TempCursor = null;
InsertCursor = null;
Util.SetProgressMessage("Cleaning up temp files");
Util.DeleteDataset(TempElvFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempClipFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempAggFCName, esriDatasetType.esriDTFeatureClass, ref InternalErrors);
Util.DeleteDataset(TempClipFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
Util.DeleteDataset(TempAggFCName + "_Tbl", esriDatasetType.esriDTTable, ref InternalErrors);
Util.CreateFillerPolygon(ElvPolyFC, SurveyID, ref InternalErrors);
}