[GRASS-user] Import ASCII point file, project to current location
Rich Shepard
rshepard at appl-ecosys.com
Fri Sep 9 11:07:34 PDT 2016
I'm missing something simple here and have not found a man page or other
explanation about the missing step.
The source file is in standard format with long/lat points. The target
location is the Oregon state standard projection and coordinate system: NAD
1983 HARN State Plane, Oregon North; FIPS 3601 Feet Intl. and Geographic
Coordinate System: North American 1983 HARN.
When the source .txt file in in the target location/mapset v.in.ascii
imports it but it is still in long/lat coordinates so I moved the source to
a new mapset in the Oregon long/lat NAD83 location (which is the target
projection and coordinate system (unless the HARM adjustment changed
things).
Importing the source .txt file into the Oregon-ll83 location's project
mapset with v.in.ascii gave me a vector file in x-y coordinates.
Restarting grass in the target location/mapset I ran 'v.proj
location=Oregon-ll83 mapset=4247.01 input=proj_bnd' (all on one command
line).
However, when I try to overlay a much larger LiDAR raster file with the
proj_bnd vector file the do not overlap which means the reprojection was not
correct.
The vector file bounds are:
N: 575450.6 S: 573920.8
E: 7532700.7 W: 7531630.3
The extent of one of the raster files is:
634966.8 - 664969.8
1240513.2 - 1286590.2
My web searches and reading the grass doc pages did not show me what I've
done incorrectly.
Advice needed.
Rich
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