On 07/09/2018 06:43 PM, Rich Shepard
wrote:
In the Notes section of the 7.5 r.proj manual the second and thirdYes, but you can change both anytime you need a different extent or resolution. What happens to other maps (vector and raster) in that location if theNothing region and resolution are changed to match that of the source map? I thoughtNo, r.proj transforms a raster from one projection (location) to a different projection (location) that of the target.You should be only in the *target* location. First run: r.proj -g location=<source location> mapset=<source mapset> input=<source raster> Then copy/paste the output to the g.region -ap command. Then rerun r.proj without the -g flag. third sentence suggests snapping the source grid's region and resolution toYes, but every projection transform creates a new regular grid, requiring a "warp" of the original regular grid cells. That's why it's a good idea to use the '-a' flag to g.region to align the cells and extent settings. and 2) how does this change affect the source location?None whatsoever As Markus said, the source region settings are irrelevant here. One final comment: I noticed in a previous post: > This I did: > > r.proj loc=elwood map=PERMANENT in=elwood_dem2013 -g > WARNING: Input and output locations are the same <<==== ???? Obviously, the source and target locations must be different. HTH,
-- Micha Silver Ben Gurion Univ. Sde Boker, Remote Sensing Lab cell: +972-523-665918 |
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