[gdal-dev] [EXT] Re: Unknown projection

[Matt.Wilkie]

Thanks Even!


Matt



________________________________
From: Even Rouault <even.rouault at spatialys.com>
Sent: Wednesday, January 31, 2024 12:54
To: Matt.Wilkie <Matt.Wilkie at yukon.ca>; gdal-dev at lists.osgeo.org <gdal-dev at lists.osgeo.org>
Subject: [EXT] Re: [gdal-dev] Unknown projection


Matt,

surprisingly or not, the GTiff driver doesn't try to get the SRS from a .prj side car file.

So just do

gdal_edit.py 047_0001.tif -a_srs "$(cat 047_0001.prj)"

Even

Le 31/01/2024 à 20:22, Matt.Wilkie via gdal-dev a écrit :

Hello gdal,



I have a collection of aerial photos for which neither gdal nor arc pro recognize the projection. To my eye the .prj files look ok. Attached txt is gdalinfo v3.8.0 report along with the .prj. I manually formatted the below for readability:



PROJCS["UTM_07N",

    GEOGCS["NAD83-CSRS Epoch 2006 (7 Param+Vel)",

        DATUM["NAD83-CSRS Epoch 2006 (7 Param+Vel)",

            SPHEROID["GRS 80", 6378137,298.2572221010002],

            TOWGS84[1.0026,-1.9083,-0.5165, 1.288877171229702e-07, 8.998141921392988e-09, 5.376098909823645e-08, -1.18e-09]],

        PRIMEM["Greenwich",0],

        UNIT["degree",0.0174532925199433]

        ],

    PROJECTION["Transverse_Mercator"],

    PARAMETER["latitude_of_origin",0],

    PARAMETER["central_meridian",-141],

    PARAMETER["scale_factor",0.9996],

    PARAMETER["false_easting",500000],

    PARAMETER["false_northing",0],

    UNIT["metres",1]

    ]



Thanks!

Matt Wilkie

Geomatics Developer & Administrator

Environment | Technology, Innovation and Mapping

T 867-667-8133 | Yukon.ca<http://yukon.ca/>

Hours: 08:30-16:30, Mon-Wed: Office, Thu: Remote, Fri: Away.





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