<p dir="ltr">Please provide a link to the file, or the full gdalinfo output with -stats 👌</p>
<br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 18 Oct 2024, 23:16 Conrad Bielski, <<a href="mailto:conrad_bielski@yahoo.com">conrad_bielski@yahoo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:16px"><div></div>
<div dir="ltr">Hi Mike,</div><div dir="ltr">thanks for the prompt. Looking into it, the data are DEM corrected latitude/longitude. A GDAL info shows it as a regular raster band: Band 1 Block=4865x1 Type=Int32, ColorInterp=Gray</div><div dir="ltr"><br></div><div dir="ltr">How can I take advantage of VRT? That sounds like a great potential solution.</div><div dir="ltr">Thanks</div><div dir="ltr">Conrad<br></div><div><br></div>
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On Friday, October 18, 2024 at 12:01:27 PM GMT+1, Michael Sumner <<a href="mailto:mdsumner@gmail.com" target="_blank" rel="noreferrer">mdsumner@gmail.com</a>> wrote:
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<div><div id="m_2778647561325406780ydpc4fe0c58yiv7802503245"><div><p dir="ltr">Check if gdalinfo sees the longitude and latitude as geolocation arrays, then just warp to grid you want.</p>
<p dir="ltr">If they aren't auto identified this can be arranged with VRT.</p>
<p dir="ltr">Cheers, Mike</p>
<br clear="none"><div><div id="m_2778647561325406780ydpc4fe0c58yiv7802503245yqt07571"><div dir="ltr">On Fri, 18 Oct 2024, 21:55 Conrad Bielski via gdal-dev, <<a shape="rect" href="mailto:gdal-dev@lists.osgeo.org" rel="nofollow noreferrer" target="_blank">gdal-dev@lists.osgeo.org</a>> wrote:<br clear="none"></div><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:16px"><div></div>
<div dir="ltr">Hi Javier,</div><div dir="ltr"><br clear="none"></div><div dir="ltr">it is not a grid. So each raster pixel is assigned the geolocation. Yes - if I was to extract it, that's what it could be considered.</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Conrad<br clear="none"></div><div><br clear="none"></div>
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On Friday, October 18, 2024 at 11:37:28 AM GMT+1, Javier Jimenez Shaw <<a shape="rect" href="mailto:j1@jimenezshaw.com" rel="nofollow noreferrer" target="_blank">j1@jimenezshaw.com</a>> wrote:
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<div><div id="m_2778647561325406780ydpc4fe0c58yiv7802503245m_-3510891761622411929ydp220a3229yiv9165000355"><div><div dir="ltr"><div>Is it an actual grid? in the meaning of having constant step size in X and Y.</div><div>In that case the geolocation is just the corner and the x and y sizes. You can convert to a georeference raster, and warp it.<br clear="none"></div><div>If it is not the case, you have something more like a 2D pointcloud, or a bunch of poins in a strange vector format.<br clear="none"></div></div><br clear="none"><div><div id="m_2778647561325406780ydpc4fe0c58yiv7802503245m_-3510891761622411929ydp220a3229yiv9165000355yqt52586"><div dir="ltr">On Fri, 18 Oct 2024 at 12:20, Conrad Bielski via gdal-dev <<a shape="rect" href="mailto:gdal-dev@lists.osgeo.org" rel="nofollow noreferrer" target="_blank">gdal-dev@lists.osgeo.org</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:16px"><div dir="ltr">Hello GDAL-experts,</div><div dir="ltr"><br clear="none"></div><div dir="ltr">normally when I use GDAL for reprojecting imagery, the projection information that I use is the source spatial reference (SRS) associated with the imagery. However, now I have imagery which is lat/lon geographic and I have two separate bands which also carry the pixel geographic information. So the following raster inputs all the same size:</div><div dir="ltr">1. Band 1 = latitude</div><div dir="ltr">2. Band 2 = longitude</div><div dir="ltr">3. Band 3 = imagery</div><div dir="ltr"><br clear="none"></div><div dir="ltr">The question I have is how best to integrate this information into a reprojection workflow?</div><div dir="ltr"><br clear="none"></div><div dir="ltr">I presume that gdalwarp is the best option here, but how can I take advantage of the individual pixel location information (rather than just the extents for example)? I know that I can mosaic into an existing file that I have already created in the target projection. Is this the best way to apply gdalwarp in this context?</div><div dir="ltr"><br clear="none"></div><div dir="ltr">I'm just wondering what is the best way to integrate the lat/lon pixel information into my warping using gdalwarp.</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Thanks in advance for your help,</div><div dir="ltr">Conrad<br clear="none"></div></div></div>_______________________________________________<br clear="none">
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