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

[Markus Metz]

On Fri, Sep 9, 2016 at 8:07 PM, Rich Shepard <rshepard at appl-ecosys.com> 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
>

Try importing the long/lat points to a standard ll WGS84 location (not
ll with NAD83), then reproject to the target location.

Markus M



>   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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