Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Helmut Kudrnovsky
Rich Shepard wrote > On Tue, 20 Sep 2016, Helmut Kudrnovsky wrote: > >> If it is about raster reprojection, there are hints in the r.proj manual >> about region settings before applying r.proj. >> >> A simple way to do this is to check the projected bounds of the input map >> in the current

Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Rich Shepard
On Wed, 21 Sep 2016, Nikos Alexandris wrote: Some observation: `-g` prints out in shell style, suitable for `eval`uating. The `eval` utility, for example, constructs a command, from the given arguments (here, the ouput of `g.region -g`) which is then executed by the shell. See for example

Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Rich Shepard
On Tue, 20 Sep 2016, Helmut Kudrnovsky wrote: If it is about raster reprojection, there are hints in the r.proj manual about region settings before applying r.proj. A simple way to do this is to check the projected bounds of the input map in the current location's projection using the -p flag.

Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Rich Shepard
On Wed, 21 Sep 2016, Micha Silver wrote: The r.proj module has a flag to get the new resolution settings when reprojection data from one LOCATION to another. Before reprojecting the map from ** unknown (default: WGS84) ** to nad83harn, try r.proj -g. Then use those parameters to set the region

Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Rich Shepard
On Tue, 20 Sep 2016, Helmut Kudrnovsky wrote: you can set a location's resolution to whatever you want. all is in the manual. Helmut, I've read the manual, several times. But it does not tell me why I see a difference in the two regions by re-projecting the data from the source. Thank

Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Moritz Lennert
On 21/09/16 09:35, Nikos Alexandris wrote: Rich Shepard wrote: The LiDAR source location has x- and y-resolution of 3 feet (international) and several thousand cells east-west and north-south. g.region -p for this location displays: projection: 99 (unnamed) zone: 0 datum: **

Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Nikos Alexandris
Rich Shepard wrote: The LiDAR source location has x- and y-resolution of 3 feet (international) and several thousand cells east-west and north-south. g.region -p for this location displays: projection: 99 (unnamed) zone: 0 datum: ** unknown (default: WGS84) ** ellipsoid: grs80

Re: [GRASS-user] A question about raster map resolutions

2016-09-21 Thread Helmut Kudrnovsky
Rich Shepard wrote > The LiDAR source location has x- and y-resolution of 3 feet > (international) and several thousand cells east-west and north-south. > g.region -p for this location displays: > > projection: 99 (unnamed) > zone: 0 > datum: ** unknown (default: WGS84) ** > ellipsoid:

Re: [GRASS-user] A question about raster map resolutions

2016-09-20 Thread Micha Silver
On 21/09/2016 02:30, Rich Shepard wrote: The LiDAR source location has x- and y-resolution of 3 feet (international) and several thousand cells east-west and north-south. g.region -p for this location displays: projection: 99 (unnamed) zone: 0 datum: ** unknown (default: WGS84)

Re: [GRASS-user] A question about raster map resolutions

2016-09-20 Thread Helmut Kudrnovsky
Rich Shepard wrote > The LiDAR source location has x- and y-resolution of 3 feet > (international) and several thousand cells east-west and north-south. > g.region -p for this location displays: > > projection: 99 (unnamed) > zone: 0 > datum: ** unknown (default: WGS84) ** > ellipsoid:

[GRASS-user] A question about raster map resolutions

2016-09-20 Thread Rich Shepard
The LiDAR source location has x- and y-resolution of 3 feet (international) and several thousand cells east-west and north-south. g.region -p for this location displays: projection: 99 (unnamed) zone: 0 datum: ** unknown (default: WGS84) ** ellipsoid: grs80 north: