I have a data set of cross section lines (station lines). Each cross section has two intersection points, where the cross section intersects a flood zone boundary. I have extracted elevation values to these intersection points, based on a DEM. I created a new field called "ElevDiff." Is anybody aware of an expression/function I could put into the Field Calculator that would allow me to calculate the difference in elevation between the two intersection points for each cross section?
I know I could do this in excel (absolute value of one cell minus another), but there are 14,000 cross sections, so I was trying to use model builder to automate the process (this is just one step in a complex flood zone analysis) so I wouldn't have to export anything to excel and then create more joins.