private void Configure()
{
_shadedRelief = new ShadedRelief();
_noDataColor = Color.Transparent;
Scheme = new ColorScheme();
if (_raster != null)
{
var Colors = _raster.CategoryColors();
if (Colors != null && Colors.Length > 0)
{ // Use colors that are built into the raster, e.g. GeoTIFF with palette
var Names = _raster.CategoryNames();
bool overMaxCount = false;
var UniqueValues = _raster.GetUniqueValues(Colors.Length, out overMaxCount);
_isElevation = false;
for (int i = 0; i < Colors.Length; i++)
{ //Only add colors to the legend if they appear in the layer
//NLCD CategoryColors include 256 colors, but only 16 are valid
if (UniqueValues.Contains(Convert.ToDouble(i)))
{ // It seems buggy that using value i - 1 below works
ICategory newCat = new ColorCategory(i - 1, Colors[i]);
if (Names != null && Names.Length > i)
{
newCat.LegendText = Names[i];
}
else
{
newCat.LegendText = i.ToString();
}
Scheme.AddCategory(newCat);
}
}
}
else // Assume grid is elevation
{
_elevationFactor = 1 / 3640000f;
_isElevation = true;
_extrusion = 1;
_scheme.ApplyScheme(ColorSchemeType.FallLeaves, _raster);
}
}
}