Dear ESRI community
I'm currently trying to generate cross sections along a river centerline at specified locations (i.e. either point features or x;y locations). I'm trying to roughly determine the floodplain for a river section based on an expected increase in elevation at the river centerline. I'm looking to take the current elevation of the river centerline and increase it by firstly 3m and then by 5m to determine the impacted area for each level.
What I've done so far is use HEC-GeoRAS to generate the cross-sections automatically based on a specified distance and cross-section length. The problem with the current method is that the positions are then not necessarily going through the raster cell centers. This then causes an interpolation between the surrounding cells and makes it difficult to identify the flood extent levels when the flooded level is say 13m and the identified location of the same level for the left and right bank can be determined by identifying either subracting the flood level and identifying where the value is equal to 0.
What I'm trying to figure out is a way to automatically generate cross sections along a river centerline at specified locations which will ensure that the generated cross sections pass through the center of the raster cell and make it a lot easier to identify the left and right bank extents of the proposed floodline.
Regards
CrossSection01 = Current Cross Section Positions
CrossSection02 = Prefered Cross Section Postions
