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2
votes
2answers
4k views

GDAL: Convert specific RGB (GeoTIFF) color to transparent

I have an RGB GeoTIFF file and I want to convert a specific RGB colour to transparent. I would like to use GDAL for doing this, but external Python scripts are also an option (though I haven't learned ...
6
votes
2answers
537 views

How to alter transparency by spatial location

I'm trying to create a map that has a all layers within a subject area having 0% transparency (full opaque), while features outside that area (defined by a polygon shapefile) having a reduced ...
4
votes
3answers
1k views

Transparency for PDFs in Arc

Trying to generate a vector-based PDF map, which includes transparencies, for quality purposes. However, I'm finding that transparencies get rasterized instead and is lower quality. Is there any ...
3
votes
1answer
489 views

How to make a transparent background image using r.out.png?

Can the white background of the r.out.png of GRASS be changed to transparent?
5
votes
6answers
8k views

ArcObjects - Create and Draw a Transparent Polygon

I'm trying to create a transparent Polygon in ArcMap; however, it's never transparent. Here's the code I have. // Create polygon IPolygon polygon = new PolygonClass(); // create & add ...
4
votes
2answers
8k views

How can I create a transparent marker/symbol in ARCGIS 10?

I am trying to do this by setting up the transparency of the layer, but the markers seem unaffected by this change. Any ideas?