Why aren't my two images lining up correctly after importing them into Didger?

If two images that have been imported into Didger aren't lining up, it is likely that the two images are calibrated or georeferenced slightly differently. It could be that one was simply calibrated differently than the other (using a different projection, projection setting, or datum), or maybe one was calibrated incorrectly or not very precisely.  

To verify the calibration for both images, you can open each image independently in a raster project and confirm that the calibration settings are exactly same for both images.  If they are, note the coordinates of a common point on both bitmaps.  If the coordinates are not the same, then the images aren't going to line up when you import them both into a vector project.  You might need to re-calibrate one to match the other.


Updated August 2, 2018

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