[OpenDroneMap-users] GCPs and Georeferencing

[Dennis Baldwin]

Alex,

Thanks for following up.

Yes the orthophoto looks really good. You can see it here:

https://www.dropbox.com/s/42csbbk0dklskmp/odm_orthphoto.png?dl=0

and here are my GCPs for reference:

https://www.dropbox.com/s/e4cb7iuwfxc2ysm/gcp_list.txt?dl=0

Let me know if I can provide any additional info and enjoy the conference.
Wish I could have made it out!

Dennis

On Wed, Mar 11, 2015 at 12:42 AM, Alex Mandel <tech_dev at wildintellect.com>
wrote:

> On 03/10/2015 02:08 PM, Dennis Baldwin wrote:
> > Hi,
> >
> > I've been working on a list of GCPs that I can patch out to the Caliterra
> > sample data set. Before I submit the patch I wanted to do some testing
> so I
> > just ran them through ODM. Everything finished cleanly and I see the
> > following file in the odm_texturing folder:
> >
> > odm_textured_model_geo.obj
> >
> > I can open it in Meshlab and it's nicely stitched together. My question
> is
> > how can I verify that it's properly georeferenced? I looked in the
> > "Reference scene" menu but it's empty. I also noticed there is an
> > odm_orthphoto.png file in the results folder, but running gdalinfo
> doesn't
> > yield any coordinate reference system. I'm wondering if my GCPs are
> messed
> > up or if I'm overlooking something with the results.
> >
> > My goal is to generate a geotiff and then run it through gdal2tiles so I
> > can create a nice web map like I can with Pix4D, but exponentially
> cheaper
> > :)
> >
> > Hooray ODM!
> >
> > Thanks,
> > Dennis
> >
> >
>
> Dennis,
>
> I asked Stephen the same question today at http://foss4g-na.org
>
> The odm_orthophoto.png is supposed to be it. I'll check with Stephen
> tomorrow but if we aren't writing to the png header (not even sure
> that's possible) then we'll work on a pngw file to go with it that has
> the geo information (or more ideally a geotiff).
>
> Is your orthophoto.png viewable in an image viewer? The test one from
> the copr data I did came out as a junk file so we were debugging that
> today to see about the next steps.
>
> The other path we looked at today was obj->collada->gltf->Cesium (3d
> globe). That didn't seem to work either but that appears to be an obj to
> collada conversion error.
>
> Thanks,
> Alex
>
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