Recently, I was trying to build a very specific piece of terrain dataset, and
VPB was
refusing to build it. I'm asking for clarification about what criteria VPB uses
when
deciding whether to build or not. while I talk below about VPB, I was using
OSGDEM
directly, as it was a small and simple build.
The input data was 90m SRTM DEM data and 30m Landsat natural color imagery. I
requested
VPB build a dataset of 1/10 of one degree wide and high (for example, 10.0N to
10.1N and
150.0W to 150.1W). Under these circumstances, VPB refused to build. I need to
see if I
still have the output log to see what it said.
Changing to 30m DEM data (by interpolating the 90m up in Global Mapper)
convinced VPB to
build. Using the 90m DEM data and a wider block (10.0N to 10.2N and 150.0W to
150.2W) also
convinced it things were ok.
I'm imagining there is some threshold where VPB won't build if there are
fewer than N
columns wide and M rows high of input DEM data cells covering the desired
output region,
but what are N/M, and where are they defined?
--
Chris 'Xenon' Hanson | Xenon @ 3D Nature | http://www.3DNature.com/
3D World Maps: http://3d-world-map.com/
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