UV unwrap and displace not lining up

Support Basics & Interface
1

I am making a 3D landscape based on LIDAR height data and aerial photography. I have created a plane and UV unwrapped an png image of an aerial photo onto a plane. I have resized the plane and adjusted the scale of the plane so it perfectly fits my image.

I also have a Digital elevation model of the topography of the area created in GIS. The DEM image is exactly the same size and projection of my aerial photo image - but when I use displace it doesn’t line up.

Alternatively I can put the displace on first to displace the plane. But when I UV unwrap the aerial photo it doesn’t line up again. How can I get them to line up?

Attached a photo. Top photo shows aerial photo with displace in the wrong place. Lower one shows the displace in the right place before I add the texture. I chose this example because the pier nicely shows how they are not lining up. properly. I have this error every time I try to use two images together.

error.png598×672 349 KB

2

Please ALWAYS supply an example .blend file with any support question. Or is this supposed to be a guessing game?
And make sure all textures are packed into the file before uploading.

3

cromer.blend (1.95 MB)

VERY quick example to illustrate my problem.

4

You have to include the texture into the .blend file. ( File / External Data / Pack into .blend file )

5

In your blend file the displace modifier is not set to use the UVs as the texture coordinates

Screen Shot 2017-03-26 at 15.31.25.jpg790×754 86.3 KB

6

Setting texture coordinates to uv works great, thank you! Much appreciated.