public static IRasterRenderer CreateClassifyRenderer(GCDConsoleLib.Raster gRaster, int iClassCount, string sColorRampName, bool bInvert = false)
{
// Open file raster dataset and ensure that statistics and histograms are present (absence of histograms will cause Renderer.Update() to crash)
IRasterDataset rasterDataset = ArcMapUtilities.GetRasterDataset(gRaster);
ESRI.ArcGIS.DataSourcesRaster.IRasterBandCollection pRastBands = (ESRI.ArcGIS.DataSourcesRaster.IRasterBandCollection)rasterDataset;
ESRI.ArcGIS.DataSourcesRaster.IEnumRasterBand enumRasterBand = (ESRI.ArcGIS.DataSourcesRaster.IEnumRasterBand)pRastBands.Bands;
rasterDataset.PrecalculateStats(0);
ESRI.ArcGIS.DataSourcesRaster.IRasterBand pRastBand = enumRasterBand.Next();
pRastBand.ComputeStatsAndHist();
gRaster.ComputeStatistics();
decimal maxValue = gRaster.GetStatistics()["max"];
IRasterClassifyColorRampRenderer classifyRenderer = new RasterClassifyColorRampRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)classifyRenderer;
IFillSymbol fillSymbol = new SimpleFillSymbol();
IRaster raster = rasterDataset.CreateDefaultRaster();
rasterRenderer.Raster = raster;
IColorRamp pColorRamp = null;
IStyleGalleryItem pStyleItem = GetESRIStyleColorRamp(out pColorRamp, sColorRampName);
classifyRenderer.ClassCount = iClassCount;
rasterRenderer.Update();
CreateClassBreaks((double)maxValue, iClassCount, classifyRenderer);
pColorRamp.Size = iClassCount;
bool bSucess = true;
pColorRamp.CreateRamp(out bSucess);
List <IColor> lColors = new List <IColor>();
for (int i = 0; i < classifyRenderer.ClassCount; i++)
{
lColors.Add(pColorRamp.Color[i]);
}
if (bInvert)
{
lColors.Reverse();
}
for (int i = 0; i < classifyRenderer.ClassCount; i++)
{
fillSymbol.Color = lColors[i];
classifyRenderer.Symbol[i] = (ISymbol)fillSymbol;
}
return(rasterRenderer);
}
public static IRasterRenderer CreateESRIDefinedContinuousRenderer(GCDConsoleLib.Raster gRaster, int iClassCount, string sColorRampName, bool bInvert = false)
{
try
{
gRaster.ComputeStatistics();
decimal maxValue = gRaster.GetStatistics()["max"];
int iRound = GetMagnitude(maxValue);
double maxValueRounded = Math.Round((double)maxValue, Math.Abs(iRound));
RasterStretchColorRampRenderer stretchRenderer = new RasterStretchColorRampRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)stretchRenderer;
IRasterDataset rasterDataset = ArcMapUtilities.GetRasterDataset(gRaster);
IRaster raster = rasterDataset.CreateDefaultRaster();
rasterRenderer.Raster = raster;
IColorRamp pColorRamp = null;
IStyleGalleryItem pStyleItem = GetESRIStyleColorRamp(out pColorRamp, sColorRampName);
IRasterRendererColorRamp pRenderColorRamp = (IRasterRendererColorRamp)rasterRenderer;
pRenderColorRamp.ColorScheme = pStyleItem.Name;
IRasterStretchMinMax pStretchInfo = (IRasterStretchMinMax)stretchRenderer;
pStretchInfo.CustomStretchMin = 0;
pStretchInfo.CustomStretchMax = maxValueRounded;
pStretchInfo.UseCustomStretchMinMax = true;
stretchRenderer.LabelHigh = maxValueRounded.ToString();
stretchRenderer.LabelLow = "0.0";
if (bInvert)
{
IRasterStretch2 pStretch = (IRasterStretch2)stretchRenderer;
pStretch.Invert = true;
}
rasterRenderer.Update();
return(rasterRenderer);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return(null);
}
}
/// <summary>
/// Constructing this object from a raster and a number of bins
/// </summary>
/// <param name="bins"></param>
/// <param name="rRa"></param>
public Histogram(int bins, Raster rRa)
{
rRa.ComputeStatistics();
Dictionary <string, decimal> stats;
try
{
stats = rRa.GetStatistics();
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
stats = new Dictionary <string, decimal> {
{ "max", 0 },
{ "min", 0 },
};
}
Tuple <int, decimal> newDims;
// No point calculating stats if there are no bins
if (stats["max"] == stats["min"])
{
if (stats["max"] == 0)
{
newDims = new Tuple <int, decimal>(1, 1);
}
else
{
newDims = new Tuple <int, decimal>(1, Math.Abs(stats["max"]));
}
}
else
{
newDims = GetCleanBins(bins, stats["max"], stats["min"]);
}
_init(newDims.Item1, newDims.Item2);
}