0
votes
0answers
21 views

IMG and geoTIFF raster extraction

everyone. I'm very new to GIS technologies. Somehow, i need to extract raster(RGB data) data from geoTIFF and IMG files. What is the fastest way doing it?
-1
votes
0answers
22 views

Measure Displacement in ERDAS Imagine

How do I measure the displacement between two images in ERDAS Imagine. What tool do I use? I have looked in the ERDAS field guide.
0
votes
0answers
21 views

How to repeatedly mosaic raster in Erdas?

I have found script to mosaic raster in R. But the output raster size is almost 9 times bigger (92mb) than mosaic it in Erdas (12mb). So I prefer mosaic raster in Erdas. But it wastes so much time to ...
2
votes
1answer
34 views

Stacking overlapping rasters, keeping cell values on top?

I have a land cover classification that consists of three files. One file is the LCC for the western half of my study area, another covers the eastern half (these two overlap in the middle), and the ...
8
votes
3answers
852 views

calculate area of vegetations in a raster file

How do I calculate area of several vegetation types in a raster (.img file type) image. They are color coded. Am using QGIS (1.8.0) and ERDAS 9.2.
6
votes
2answers
1k views

Creating shapefile of satellite image footprints?

I'm looking for a tool or a workflow to compute satellite image footprints, for a large number of images across directories, and produce a shapefile. Ideal work flow would be: fire up tool point to ...