First I need to make a correction, I actually use 0.5x0.5 arc degree areas with 10ft distance between the lines, as Florida is supposedly very flat, for the contour calculations. With 1.0x0.5 I run out of memory already in the second quad (Bay Minette). Funnily enough the the error is something like: "Unable to save ...." (Sorry, cannot remember the exact text at the moment).
I did a comparison of the generated contour files for quad "Dothan":
With 1.0x0.5 arc degrees one gmp file with 336415767 bytes is generated, with 0.5x0.5 arc degrees two files with 13503542 + 14945378 = 28448920 are generated, so for some reason less bytes (10x less!!) are generated for the same area by only reducing the contour grid size.
Yes, maybe more memory would solve the problem, but that the areas with only water in them lead to problems hints at a problem in Global Mapper. I had two more problems with "ocean only" elevation data and removing those areas seems to solve the problems so far. Also, about how much more memory are we talking? My machine has 2GB plus virtual memory, as it is running on XP there is not much room for more (3GB usually, or 4GB with tweaks).
Volker
@savage: Maybe reducing the contour grid size solves your problem.
I did a comparison of the generated contour files for quad "Dothan":
With 1.0x0.5 arc degrees one gmp file with 336415767 bytes is generated, with 0.5x0.5 arc degrees two files with 13503542 + 14945378 = 28448920 are generated, so for some reason less bytes (10x less!!) are generated for the same area by only reducing the contour grid size.
Yes, maybe more memory would solve the problem, but that the areas with only water in them lead to problems hints at a problem in Global Mapper. I had two more problems with "ocean only" elevation data and removing those areas seems to solve the problems so far. Also, about how much more memory are we talking? My machine has 2GB plus virtual memory, as it is running on XP there is not much room for more (3GB usually, or 4GB with tweaks).
Volker
@savage: Maybe reducing the contour grid size solves your problem.