How to Reimport Tiled Landscape Heightmap

Is there a way to reimport tiled landscape heightmaps (not weightmaps) in world composition? I would rather not have to redo my landscape setup everytime I want to bring in changes to the heightmaps.

Found the solution: Open each individual map associated with a tile and reimport heightmap under the Sculpt tab. Would be nice to have the option to reimport all maps including weightmaps but oh well.