In QGIS I turned off CRS. It then read the data of the image correctly.
I have brought a tiff photo of a side of a building into qGIS. It is about 300 images that were put together in Pix4d to an orthomosaic. When I took the photo I marked off 5m segments on the building with tape.
When I use the "Measure" tool in QGIS between the tape marks I get about 553,000 meters.
Is there an easy way to calibrate the measure tool to a known distance in the photo? I'd like to calibrate it and then use the measure tool to measure other things.
The reason I'm doing this is that I need to share the photo with someone, and I'd like them to be able to do measurements on the photo. QGIS seemed an ok way to do this.