Modify raster layer display and symbology properties programmatically with arcpy or ArcObjects

Question

I have over 1500 NITF files that I need to be able to modify the layer display and symbology of programmatically from within ArcMap. I need to set the properties outlined in red below:

I've looked through the arcpy docs and it doesn't look like these properties are exposed - honestly, I didn't expect them to be. I have a feeling I can get to them through ArcObjects. Anyone had any experience/luck modifying these properties programmatically?

Answer 1

I believe stretched raster symbology is rendered via RasterStretchColorRampRenderer, so interfaces implemented by this class are a good start. The renderer is assigned to your raster layer through IRasterLayer.Renderer.

1. Stretch type: IRasterStretch.StretchType
2. High/low stretch values: IRasterStretchMinMax

Orthorectification is controlled by a different set of interfaces, pertaining to the raster data source itself. IRaster2.GeodataXform can point to a geodata transformation class implementing ISensorXform which contains the orthorectification properties you see in the layer's property page.

Answer 2

If you need to apply the same symbology to every image, you can setup one layer with the appropriate symbology, save it to a layer file, and then invoke the arcpy.ApplySymbologyFromLayer_management to apply the symbology.

However, if you are really trying to deal with 1500 NITF files, you may consider using a Mosaic Dataset. You can apply an appropriate "stretch" to each NITF in the Mosaic Dataset and apply ortho rectification across all the images.