.slpk export projection issue

PIX4Dmapper
1

Hi,

I’m encountering an issue with exporting 3D mesh data from Pix4D Mapper. My drone imagery was captured in WGS84 UTM Zone 11N (EPSG:32611), and both the orthomosaic and DSM exports retain this projection correctly. However, when I export the mesh as a .SLPK file, it defaults to WGS84 Geographic (EPSG:4326), despite setting the output coordinate system to 32611.

This results in a noticeable east-west stretching of the mesh when viewed in ArcGIS Online. While the mesh projects correctly on-the-fly in ArcGIS Pro, this doesn’t help for AGOL, where reprojection isn’t supported for .SLPK files.

I’ve tested multiple export configurations, but the issue persists. To my knowledge, there’s no straightforward way to reproject a .SLPK file after export. I’ve also explored alternative software options, but Pix4D Mapper consistently delivers the best texture quality for my 3D meshes—so I’d really like to resolve this within that workflow.

Has anyone else experienced this issue and found a workaround? I’d appreciate any insights or suggestions for getting properly projected .SLPK files from Pix4D into ArcGIS Online.

Thanks in advance,

2

Hello,
It is important that you are using the latest version of PIX4Dmapper. Otherwise, this can be very difficult for us to troubleshoot any issue with the coordinate system.

For AGOL, you will likely need to process using the Web Mercator projection. Otherwise, the basemap will not match the layer’s spatial reference and will get dropped. Thus, the mesh will appear as though it is floating in space.

3

I’ll give that a try. Thanks for the suggestion, Mike.

I tried Pix4Dmatic, and it does a better job exporting the .SLPK in the projection it was processed in. However, the tree textures and building details aren’t as nice in the mesh compared to those processed with Pix4Dmapper. I’m hoping I can get it sorted out with Mapper for this reason.

4

Hi Mike,

I recently upgraded to Mapper 4.10 and my .SLPK still exports as 4326, regardless of what I have the output coordinate system set as in the project. Is there anyway around this, or is this just a limitation when exporting the 3D mesh as a LOD Mesh to SLPK?

Thanks in advance.

5

Hi @Camal_Dharamdial there are no immediate plans to improve the SLPK export in PIX4Dmapper at the moment. It would be best to continue using PIX4Dmatic for that export.

You mentioned that “the tree textures and building details aren’t as nice” in PIX4Dmatic - do you have any screenshots/examples to share so that we can have a look?