2

I have a shapefile with points, that each have an elevation in their attribute tabel, based on how high the water level is, at a given return period. I need to create a buffer around these points at 50 m, that needs to dissolve into one shape using the highest attribute along the points at the overlaps.

Then I need to see if this buffer/waterlevel is higher than the surrounding terrain, thereby giving an indication if the area will be flooded.

Overview of the area, points need a buffer using their attribute

Is this possible using ArcMap Standard (With Spatial Analyst, 3d analyst and ArcHydro)?

1

It's possible using IDW in 3d Analyst or Spatial Analyst. This can create a Raster with elevation by interpolating between the points. It's important to make sure the buffer is large enough and parameters for the interpolation is correct (depends on what you need).

Then using Raster Calculator (DEM - WaterLevel from IDW) and everything positive will be flooded if it's connected to the stream (line).

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.