I am using the DEM files in the Cornell CUGIR repository to build contour layers in QGIS. The problem I have is that while it is easy to do, it requires many manual steps in QGIS that are both tedious and prone to error. I would like to know if there are any tools out there to automate the process.
Starting with a directory of DEM files, on a Unix box (in my case a Mac), here is what I would like to do:
- convert the DEM files from metric to english units (meters -> feet)
- create a contour layer with 100 ft intervals including labels for the elevation
- create a contour layer with 20 ft intervals including labels for the elevation
- apply the same style to all the created contour shape files
The tool I envision would either find all the applicable DEM files in a directory or take the list of files as a command line argument. I will write this myself if there isn't one out there somewhere already.