Tagged Questions

3
votes
2answers
107 views

What Information Does the Blue Band Provide?

I am playing around with ERDAS and was implementing image difference on two rasters separated by interval of time. I was using a blue band raster and I created a default threshold for percentage ...
0
votes
0answers
98 views

How to make Mapnik render Erdas images in RGB instead of grayscale?

I have some orthophoto files (Erdas Imagine format) enclosed in a vrt file. When I view it in any desktop GIS it has proper RGB colors, but when I use the vrt in Mapnik to render some tiles, I get ...