On 17/08/18 10:11, "Peter Löwe" wrote:
Hi Markus, all,
thanks for the feedback. The new temporary location option is a great feature.
However, I wonder whether having to manually create a POINTS file within the
locations file structure is (still) the proper way to handle the rectification
process in GRASS 7.x. This approach dates back to GRASS 4.x. There are no
references to it in the recent documentation, so its kind of a (old-fashioned?)
hack.
Do you mean how to georeference without definined ground control points ?
Normally, for creating GCPs, you would use
https://grass.osgeo.org/grass74/manuals/wxGUI.gcp.html.
What do you see as a more "modern" approach ?
Moritz
best
Peter
<[email protected]>
Gesendet: Donnerstag, 16. August 2018 um 17:17 Uhr
Von: "Markus Neteler" <[email protected]>
An: "Peter Löwe" <[email protected]>
Cc: "GRASS user list" <[email protected]>
Betreff: Re: [GRASS-user] workflow to import/georectify binary remote sensing
data
Hi Peter,
On Wed, Aug 1, 2018 at 10:29 AM "Peter Löwe" <[email protected]> wrote:
Hello list,
here is a question about what's currently the most effective way to ingest
binary raster data which need to be georectified.
The data source are calibrated weather radar precipitation rasters (lots of
them), which come in a well documented binary format (+ GCPs), which is not
(yet) supported by gdal.
A "classical" approach could be:
1) Create XY location as source
2) Create LatLon location as target
(probably a metric projection would be better?)
3) Ingest data via r.in.bin (to skip over file header) into XY location
4) Use GCP to set up i.rectify within XY location
5) Apply i.rectify
6) Discard XY-location and continue work in LatLon location
In there a more effective way, probably without using a XY location ?
Perhaps the new:
grass75 --tmp-location ...
See
https://grass.osgeo.org/grass75/manuals/grass7.html#batch-jobs-with-the-exec-interface
--> Using temporary location
?
It also supports XY locations and all could be done in a script.
Best
Markus
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