[GRASS-user] 0 points loaded in v.surf.idw
Chang, Elizabeth
Elizabeth.Chang at noblis.org
Tue Jul 13 16:27:13 EDT 2010
Hi,
I'm trying to import some points from Postgres and convert it into
raster using v.in.ogr and v.surf.idw
v.in.ogr dsn="PG:host=tsf.noblis.org dbname=gis port=5433"
layer=regcm.huss_monavg_2038 output=huss_monavg_2038_395_875
where='timestamp=395.875'
v.surf.idw input=huss_monavg_2038_395_875 column=huss
output=rast_huss_monavg_2038_huss395_875
When I run the v.surf.idw, I get
13936 records selected from table
0 points loaded
ERROR: No data points found
When I try to view it in the map display, I see nothing yet I do see
13936 points which is the right number of points when I do v.info.
v.info huss_monavg_2038_395_875
Layer: huss_monavg_2038_395_875
|
| Mapset: PERMANENT
|
| Location: RegCM-4269
|
| Database: /data/grassdata/echang
|
| Title:
|
| Map scale: 1:1
|
| Map format: native
|
| Name of creator: echang
|
| Organization:
|
| Source date: Tue Jul 13 15:44:59 2010
|
|-----------------------------------------------------------------------
-----|
| Type of Map: vector (level: 2)
|
|
|
| Number of points: 13936 Number of areas: 0
|
| Number of lines: 0 Number of islands: 0
|
| Number of boundaries: 0 Number of faces: 0
|
| Number of centroids: 0 Number of kernels: 0
|
|
|
| Map is 3D: No
|
| Number of dblinks: 1
|
|
|
| Projection: Lat/Lon
|
| N: 70:15:29.96521N S: 19:27:00.387268N
|
| E: 35:43:20.669862W W: 157:42:49.097902W
|
|
|
| Digitization threshold: 0
|
| Comments:
|
|
It is a large file so I tried making the region quite small
zone: 0
datum: nad83
ellipsoid: grs80
north: 70:15:29.96521N
south: 69N
west: 120W
east: 110W
nsres: 0:15:05.993042
ewres: 0:20
rows: 5
cols: 30
cells: 150
Is there a problem with the resolution? Any ideas?
Thanks,
Elizabeth
Elizabeth Chang
Lead
Noblis
3150 Fairview Park Drive Sourth
Falls Church, VA 22042
703-610-2321 (office)
elizabeth.chang at noblis.org <mailto:elizabeth.chang at noblis.org>
*************************************
Noblis
For the best of reasons
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