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NLeSC / ahn-pointcloud-viewer

3D point cloud visualization of the Netherlands
Apache License 2.0
21 stars 4 forks source link

Overlay imagery tiles in 3d points #15

Open oscarmartinezrubi opened 8 years ago

oscarmartinezrubi commented 8 years ago

See http://potree.org/demo/experimental/potree_map_projections/examples/viewer_proj.html or http://iowalidar.com/

Maartenvm commented 8 years ago

Imaginary tiles? done!

Maartenvm commented 8 years ago

Srsly though, imagery tiles would be cool :P

oscarmartinezrubi commented 8 years ago

yes sure...anyway, i renamed to imagery...

m-schuetz commented 8 years ago

My experience with this: I tried using open layers to fetch a 128x128 or 256x256 image for each octree node and then project the image onto the points in a node. Unfortunately, the performance of this approach was not in an acceptable range. Since it was rendering into a canvas element or at least using DOM elements it also couldn't be moved into a parallel WebWorker.

My next try would have been to directly load image tiles from within an WebWorker which also brings it into the correct format so the main thread can pass it to the GPU without further processing.

Maartenvm commented 8 years ago

Yes, I've come to the same conclusion. We can get the tiles for the (official) aerial photography of the Netherlands from the Dutch cadastre institution but I'm afraid I just can't spare the time to implement this. I'm therefore filing this under "Future work".