Hi everyone,
When I georeference a raster in "other GIS software," I'm able to place one point on the raster I'm georeferencing and one point on the source I'm using to georeference the raster, and when I'm done, those two points are aligned exactly on top of each other, just as I intended. For example, if I see a fence post in the raster I'm trying to georeference and that same fence post on my reference imagery, I place a control point on the fence post in my raster and a control point on the fence post in the reference imagery, and then - boom. Both control points are in the same place and the fence post in my raster lines up perfectly with the fence post in my reference imagery.
That's how it works with other GIS software.
I absolutely cannot get it to work like this in ArcGIS Pro.
When I add a control point to my source raster and then add a control point to the target raster - both to the exact same reference (tree, fence post, property corner, etc.) - the control points never line up exactly on top of each other no matter what I do. They're always offset by some distance, sometimes by quite a bit.
For example, I'll try to georeference a PDF of a set of engineer's plans. This is on the scale of a few dozen acres, but it requires extreme precision because there are property lines involved and we absolutely cannot cross these property lines - in fact, we're obligated to stay a specific distance away from the property boundary, so I need my georeferenced raster to be very precise. I'll place a green control point on the PDF I'm trying to georeference (the source) on a property corner. I'll then place a red control point on reference satellite imagery or a reference plat, etc. (the target), on that same exact property corner. When I hit "apply," the PDF I'm trying to georeference will certainly shift some, but it never lines up exactly so that the green and red control points are right on top of each other.
No matter how many times I attempt this, no matter how many control points I add, I simply cannot get them to line up exactly on top of each other. There's always an offset despite placing the control points on exactly the same features in both the source and the target.
Can someone explain to me why this is the case and why it's so much easier to do this in "other GIS software"? I'd love to perform all of my work functions in the ArcGIS environment, but this is frustrating me beyond belief and I'm just about to throw in the towel and exclusively use other software for georeferencing.
