[GRASS-user] Import ASCII point file, project to current location

[Helmut Kudrnovsky]

Rich Shepard wrote
> 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

AFAIK v.in.ascii doesn't do reprojection on the fly.

first import your ascii vector by v.in.ascii into the location with the
appropriate coordination system; then do v.proj to the Oregon long/lat NAD83
location



-----
best regards
Helmut
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