Add imagery basemap

ParaView Support
1

Hello,
I managed to merge a CityGML with NetCDF in a GLTF file using Parawier & Blender.

image
image997×646 77 KB

In order to make a realistic render, I would like to add a basemap below from a TIFF file.

image
image1123×936 458 KB

So far I only manage to make some “color legend” render like this :

image
image1276×721 285 KB

I’ve seen the topic with the “File → Load Texture” but I don’t have this option.
I’ve also seen the N’Cube plugin but haven’t tried yet because I’m not admin of my PC (GitHub - mobigroup/ParaView-plugins: ParaView plugins)
Do you know if it’s possible to display the image as the initial image ? Thanks, Frank

2

If I understand your issue, you will want to select your tiff image in the pipeline browser and then unclick the “Map Scalars” checkbox in the property inspector. That should treat the image components as RGB values instead of mapping them through a color lookup table (the default paraview red-white-blue colormap).

3

Thanks a lot,
I manage to export the texture in the GLTF with Blender but I had to do it manually :

image
image1620×909 313 KB

When I export the TIFF to GLTF with Paraview, the TIFF is not include in the GLTF, do you know why please ? Frank

4

I am not familiar with GLTF. Looking at the source:

https://gitlab.kitware.com/vtk/vtk/-/blob/master/IO/Export/vtkGLTFExporter.h#L19-22

it appears @martink wrote the exporter knowing it would only provide a subset of GLTF’s capabilities and a subset of what VTK/ParaView can do as well. You can file a feature request/bug report for this issue (or contribute a fix yourself), but without funding it is difficult to address a lot of requests – so don’t expect immediate results.

5

I have no issue exporting data with colors to glTF, either through map/unmapped scalars or event textures.

Can you share a dataset to reproduce the issue @frank_forster ?

6

Hello Mathieu,
Please find a file that I can’t export to GLTF.

image
image1105×770 243 KB

Raster1_CC46
Raster1_CC463549×2959 1.78 MB

7

It looks like exporting image data to glTF is not supported (yet). A easy work around is to convert it into a polydata first using AppendDataset filter.

8

Hi again Matthieu,
It works ! Thank you :slight_smile:
FYI I noticed that the image orientation was not taken into account while exporting to GLTF so I had to move the building instead.

image
image930×628 186 KB