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<p>Michael,</p>
<p>You need to attach the CRS at layer creation time with:<br>
</p>
<p>layer = ds.CreateLayer(layer_name, geom_type=ogr.wkbPolygon,
srs=sr)</p>
<p>Setting it with featureDefn.GetGeomFieldDefn(0).SetSpatialRef()
is illegal. Now that
<a class="moz-txt-link-freetext" href="https://gdal.org/development/rfc/rfc97_feature_and_fielddefn_sealing.html">https://gdal.org/development/rfc/rfc97_feature_and_fielddefn_sealing.html</a>
has been implemented, you should have got an error... (assuming
you run your script with recent GDAL master)</p>
<p>from osgeo import ogr<br>
ogr.UseExceptions()<br>
ds = ogr.GetDriverByName('ESRI
Shapefile').CreateDataSource('/tmp/foo.shp')<br>
lyr = ds.CreateLayer('foo')<br>
from osgeo import osr<br>
sr = osr.SpatialReference()<br>
sr.SetFromUserInput("OGC:CRS84")<br>
featureDefn = lyr.GetLayerDefn()<br>
featureDefn.GetGeomFieldDefn(0).SetSpatialRef(sr)<br>
Traceback (most recent call last):<br>
File "<stdin>", line 1, in <module><br>
File
"/home/even/gdal/gdal/build_cmake/swig/python/osgeo/ogr.py", line
6017, in SetSpatialRef<br>
return _ogr.GeomFieldDefn_SetSpatialRef(self, *args)<br>
RuntimeError: OGRGeomFieldDefn::SetSpatialRef() not allowed on a
sealed object<br>
<br>
</p>
<p>I can't think of a reason why your script wouldn't work with a
FlatGeoBuf output (did you get an error message?), which would be
much better, as you could also attach the XRES, YRES, BANDCOUNT,
etc. metadata items that would help the GTI driver avoid probing
one of the tiles.<br>
</p>
<p>Even<br>
</p>
<div class="moz-cite-prefix">Le 30/01/2024 à 12:31, Michael Sumner a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CAAcGz9_OBkQ-ZdnN-RWD2r9xTVQ8nv5ds=qk4MpATzgjO7+M5w@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">awesome, thanks Even I'm having fun with this one.
<div><br>
</div>
<div>For anyone interested I created Python to parse the
OpenTopography COP90 VRT (I have to wget it locally as I don't
know how to hit the URL for the xml yet). </div>
<div><br>
</div>
<div><a
href="https://github.com/mdsumner/cog-example/blob/1ca74f3baffe69830180031ddabcbbc569816150/gti/cop90.py"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/mdsumner/cog-example/blob/1ca74f3baffe69830180031ddabcbbc569816150/gti/cop90.py</a><br>
</div>
<div><br>
</div>
<div>(I'm using the DstRect to get efficient extent polygon of
each tif without opening them). </div>
<div><br>
</div>
<div>This writes a cop90.shp which can be GTI'd via </div>
<div><br>
</div>
<div>gdalinfo GTI:/vsicurl/<a
href="https://github.com/mdsumner/cog-example/raw/main/gti/cop90.shp"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/mdsumner/cog-example/raw/main/gti/cop90.shp</a><br>
</div>
<div><br>
</div>
<div>(seems I didn't get the SRS attached correctly). </div>
<div><br>
</div>
<div>I also have an R script in there for COP30 that I did
previously to FlatGeoBuf, I couldn't get FlatGeoBuf to work
from Python and don't know why. </div>
<div><br>
</div>
<div>If there's any pythonic-idiomatic advice on my code I'm
very interested, slowly I'll try to use this to do the same in
C++. If there's a faster way to get these extents with GDAL
I'm also keen to hear, thanks! </div>
<div><br>
</div>
<div>Cheers, Mike</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Jan 26, 2024 at
10:19 PM Even Rouault via gdal-dev <<a
href="mailto:gdal-dev@lists.osgeo.org"
moz-do-not-send="true" class="moz-txt-link-freetext">gdal-dev@lists.osgeo.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
the driver has recently landed into GDAL master, renamed as
GTI: <br>
<a href="https://gdal.org/drivers/raster/gti.html"
rel="noreferrer" target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://gdal.org/drivers/raster/gti.html</a><br>
<br>
Can be tested using <br>
<a
href="https://gdal.org/download.html#gdal-master-conda-builds"
rel="noreferrer" target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://gdal.org/download.html#gdal-master-conda-builds</a>
, the refreshed <br>
<a href="http://ghcr.io/osgeo/gdal" rel="noreferrer"
target="_blank" moz-do-not-send="true">ghcr.io/osgeo/gdal</a>
Docker image, or other nightly builds of GDAL master<br>
<br>
Even<br>
<br>
Le 20/12/2023 à 19:33, Even Rouault via gdal-dev a écrit :<br>
> Hi,<br>
><br>
> For those not actively following github tickets & PR,
I just want to <br>
> point to a new pending major functionality to improve
management of <br>
> virtual mosaics with a very large number of tiles/sources
(> tens of <br>
> thousands of tiles), by referencing them as features of a
vector layer <br>
> (typically created by gdaltindex), instead of a XML file
as in <br>
> traditional VRT, augmented with additional metadata.<br>
><br>
> More details in <a
href="https://github.com/OSGeo/gdal/pull/8983"
rel="noreferrer" target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/OSGeo/gdal/pull/8983</a>
(and in <br>
> initial ticket in <a
href="https://github.com/OSGeo/gdal/issues/8861"
rel="noreferrer" target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/OSGeo/gdal/issues/8861</a>)<br>
><br>
> Even<br>
><br>
-- <br>
<a href="http://www.spatialys.com" rel="noreferrer"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">http://www.spatialys.com</a><br>
My software is free, but my time generally not.<br>
<br>
_______________________________________________<br>
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<a href="mailto:gdal-dev@lists.osgeo.org" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">gdal-dev@lists.osgeo.org</a><br>
<a href="https://lists.osgeo.org/mailman/listinfo/gdal-dev"
rel="noreferrer" target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br>
</blockquote>
</div>
<br clear="all">
<div><br>
</div>
<span class="gmail_signature_prefix">-- </span><br>
<div dir="ltr" class="gmail_signature">Michael Sumner<br>
Software and Database Engineer<br>
Australian Antarctic Division<br>
Hobart, Australia<br>
e-mail: <a href="mailto:mdsumner@gmail.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">mdsumner@gmail.com</a></div>
</blockquote>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.spatialys.com">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
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