[GRASS-user] A question about raster map resolutions

[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:  grs80
> north:      1286590.24500872
> south:      1240510.24500872
> west:       634966.76150938
> east:       664972.76150938
> nsres:      3
> ewres:      3
> rows:       15360
> cols:       10002
> cells:      153630720
> 
>    When in the project location g.region -p produces:
> 
> projection: 99 (NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl)
> zone:       0
> datum:      nad83harn
> ellipsoid:  grs80
> north:      588219.90693215
> south:      536993.58817534
> west:       7524575.13218961
> east:       7561596.20977101
> nsres:      2561.31593784
> ewres:      1851.05387907
> rows:       20
> cols:       20
> cells:      400
> 
>    I want to understand why the nsres is now 2561+ feet, the ewres now
> 1851+
> feet, and the numbers of rows and columns has decreased so drastically.
> 
> Looking forward to learning,
> 
> Rich
> 
> 
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> grass-user at .osgeo

> http://lists.osgeo.org/mailman/listinfo/grass-user

https://grass.osgeo.org/grass73/manuals/g.region.html

you can set a location's resolution to whatever you want. all is in the
manual. 



-----
best regards
Helmut
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