I am attempting to apply color ramps to raster files in my project. The stretch renderer allows for applying color ramps to rasters, but currently only has 3 preset options. Alternatively, I have been applying color ramps to my rasters using raster functions. However, I have only been able to load the symbology of a raster layer in runtime if the symbology is RGB. If I configure the symbology as Stretch, Unique Values, Colormap, or Classify, then the layer is loaded into runtime with no symbology, aka the layer is black/white. Raster layers with RGB symbology have multiple bands and my raster functions won't apply to rasters with more than 1 color band.
I am currently using the example color_ramp function format from: Add raster data | ArcGIS Maps SDK for .NET | ArcGIS Developers
{
"raster_function":{"type":"Color_ramp_function"},
"raster_function_arguments":
{
"resizable":{"bool":false,"type":"Raster_function_variable"},
"color_ramp":
{
"color_ramp":
{
"ramps":
[
{"to_color":[0,255,0],"from_color":[0,191,191],"num_colors":3932,"type":"Algorithmic_color_ramp","algorithmic_type":"hsv"},
{"to_color":[255,255,0],"from_color":[0,255,0],"num_colors":3932,"type":"Algorithmic_color_ramp","algorithmic_type":"hsv"},
{"to_color":[255,127,0],"from_color":[255,255,0],"num_colors":3932,"type":"Algorithmic_color_ramp","algorithmic_type":"hsv"},
{"to_color":[191,127,63],"from_color":[255,127,0],"num_colors":3932,"type":"Algorithmic_color_ramp","algorithmic_type":"hsv"},
{"to_color":[20,20,20],"from_color":[191,127,63],"num_colors":3935,"type":"Algorithmic_color_ramp","algorithmic_type":"hsv"}
],
"type":"Multipart_color_ramp"
},
"type":"Raster_function_variable"
},
"raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
"type":"Raster_function_arguments"
},
"type":"Raster_function_template"
}
The issue is that if my raster contains multiple bands, then the raster function throws up an error such as "Band Count is 3."
- Is there an issue with my raster function?
- Should I be adding some optional Raster Function Argument to allow for multiband rasters?
- Are there even other arguments other than "resizable" and "color_ramp"?
My application is offline, so I can't use an image service to handle raster functions.
