How to generate an accurate orthophoto of a bridge?
« on: March 17, 2022, 11:26:18 AM »
I'm trying to calculate an orthophoto of a bridge, but it doesn't come out well even after recalculating it.
Re: How to generate an accurate orthophoto of a bridge?
« Reply #1 on: March 17, 2022, 01:59:50 PM »
Yes, Bridges are tricky.  In this case, I recommend adding bridge points manually to terrain points by selecting them using the select tool.

First delete the points below the terrain, (you can try using Top-down and Ortho-mode) and select the bridge Next go back to perspective mode and deselect the bridge. You will end up with a selection of points directly below the bridge, like in my screenshot. Delete these points!

Select the bridge points again, right-click the Ground Class and select "Set this class to selected points" from the context menu.

At last, create the orthophoto out of this DTM model.

You should get this kind of result:

Alternatively, you can make a textured 3D Model and true-orthophoto instead of this workflow.
« Last Edit: March 17, 2022, 02:03:50 PM by ivan.zan.barbaric »