RBG map and thermal reflectance map from same drone not aligning

PIX4Dmapper PIX4Dmapper Questions/Troubleshooting
1

I’m processing some thermal and RBG data from a Zenmuse xt2 camera.

The thermal data has been processed using the Advanced Thermal Camera settings, while the RBG I used standard 3d Maps in PIX4DMAPPER.

When I open the RGB map (from the ‘DSM/Mosaic’ output folder) and the thermal reflectance map in QGIS, there is a mismatch - it looks like a slight scale mismatch as well as the RGB images having a slightly wider field of view.

I want to have these aligned perfectly to load into a KMZ google earth file

image
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- You can particularly see the mismatch in the lower left corner.
I wonder if I have a setting wrong on the thermal data? When I open the tifs in python they have the following metadata :

Metadata of thermal reflectance TIFF file:
Extent: (669333.05067, 1148309.08063, 669856.80637, 1148785.60657)
CRS: PROJCS[“WGS 84 / UTM zone 16N”,GEOGCS[“WGS 84”,DATUM[“WGS_1984”,SPHEROID[“WGS 84”,6378137,298.257223563,AUTHORITY[“EPSG”,“7030”]],AUTHORITY[“EPSG”,“6326”]],PRIMEM[“Greenwich”,0,AUTHORITY[“EPSG”,“8901”]],UNIT[“degree”,0.0174532925199433,AUTHORITY[“EPSG”,“9122”]],AUTHORITY[“EPSG”,“4326”]],PROJECTION[“Transverse_Mercator”],PARAMETER[“latitude_of_origin”,0],PARAMETER[“central_meridian”,-87],PARAMETER[“scale_factor”,0.9996],PARAMETER[“false_easting”,500000],PARAMETER[“false_northing”,0],UNIT[“metre”,1,AUTHORITY[“EPSG”,“9001”]],AXIS[“Easting”,EAST],AXIS[“Northing”,NORTH],AUTHORITY[“EPSG”,“32616”]]
AREA_OR_POINT : Area
TIFFTAG_SOFTWARE : pix4dmapper

Metadata of RGB mosaic TIFF file:
Extent: (669245.15998, 1148244.38526, 669872.58472, 1148830.96884)
CRS: PROJCS[“WGS 84 / UTM zone 16N”,GEOGCS[“WGS 84”,DATUM[“WGS_1984”,SPHEROID[“WGS 84”,6378137,298.257223563,AUTHORITY[“EPSG”,“7030”]],AUTHORITY[“EPSG”,“6326”]],PRIMEM[“Greenwich”,0,AUTHORITY[“EPSG”,“8901”]],UNIT[“degree”,0.0174532925199433,AUTHORITY[“EPSG”,“9122”]],AUTHORITY[“EPSG”,“4326”]],PROJECTION[“Transverse_Mercator”],PARAMETER[“latitude_of_origin”,0],PARAMETER[“central_meridian”,-87],PARAMETER[“scale_factor”,0.9996],PARAMETER[“false_easting”,500000],PARAMETER[“false_northing”,0],UNIT[“metre”,1,AUTHORITY[“EPSG”,“9001”]],AXIS[“Easting”,EAST],AXIS[“Northing”,NORTH],AUTHORITY[“EPSG”,“32616”]]
AREA_OR_POINT : Area
TIFFTAG_SOFTWARE : pix4dmapper

2

Hello @grace.bcolverd, They are not going to align perfectly until you use the GCPs or process them as a rig camera. However, the scale of the project should be the same. There shouldn’t be this big difference.
Were you using GCPs?
Was there any issue with the quality report?
Did you verify the camera parameter of the thermal camera?