<div dir="ltr">.OBJ is a simple object mesh (or to put it in more traditional terms: TIN) - it has shape but no data values and is not geolocated.<div><br></div><div>I don't think there is any driver for OGR that will read .OBJ.<br><br>You are going to problems with geolocation if you write your own. Geojson requires that the geometries are geolocated - and in the current version that they are in epsg:4326. That is not totally impossible - people have been using .dxf files for gis data for decades and that format is also not in theory geolocated. It is not a trivial problem though.<br><br>I guess I would ask the usual question .. why?<br><br></div><div>- what are you actually trying to achieve and why a GIS format like GeoJSON?<br> </div><div>- If you have to use GeoJSON - I am guessing you are transferring some data to something that reads GeoJSON only? In that case - can your source produce .dxf? OGR can read .dxf.<br><br>- If you only have the source in .OBJ - what other formats can the destination read? Although, if you only have the source in .obj, I very much doubt any of the GIS tools like GDAL are going to be able to help you. It just is not a format used in GIS.<br><br>It is a problem we solved in the <a href="http://www.virgis.org">ViRGiS projec</a>t - since .obj is used a lot in VR. There we used an existing library to read the .obj files - but that is in C# and I doubt that would help you.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 1 Dec 2020 at 20:15, Andrew C Aitchison <<a href="mailto:andrew@aitchison.me.uk">andrew@aitchison.me.uk</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">On Tue, 1 Dec 2020, Brandon Biggs wrote:<br>
<br>
> Hello,<br>
> I am wondering how to convert an obj file to a geojson file? I am using ogr2ogr with the command:<br>
> Ogr2ogr -f geojson output.geojson input.obj<br>
> But get the error that ogr2ogr does not have an OBJ driver. I looked on:<br>
> the vector drivers page<<a href="https://gdal.org/drivers/vector/index.html" rel="noreferrer" target="_blank">https://gdal.org/drivers/vector/index.html</a>><br>
> but am unable to find a simple obj converter. I am wondering if there is such a thing? I am probably going to write my own that does what I want, because OBJ is so simple, I was just wondering if GDAL could already do it.<br>
<br>
I've never heard of OBJ, but that doesn't mean much.<br>
<br>
If you only want a read-only ogr driver you might want to look at<br>
<a href="https://gdal.org/tutorials/vector_python_driver.html" rel="noreferrer" target="_blank">https://gdal.org/tutorials/vector_python_driver.html</a><br>
if you would find a quick-n-dirty python quicker to write than C++.<br>
<br>
-- <br>
Andrew C. Aitchison Kendal, UK<br>
<a href="mailto:andrew@aitchison.me.uk" target="_blank">andrew@aitchison.me.uk</a><br>
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