[GRASS-user] A question about raster map resolutions

[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:      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