DEM input

An additional option while generating maps of water depth is to include ground level information from external DEM files. In that case, the water lev­els are mapped to the DEM to compute the water depth, instead of interpolat­ing the ground levels from the cross sections.

To include this option, activate the 'DEM input' tick-box.

One or more Digital Elevation Model files must then be supplied in the table. Items are added or deleted using the '+' and '-' buttons above the table. The use of multiple DEM files is intended to support multiple DEM tiles to cover the entire area: in that case all the tiles can be supplied in the table, with no need to merge them in a single file. If some files overlap, the topography in the overlapping area will be defined by the first DEM in the list. The 'Move up' and 'Move down' buttons above the table can be used to change these priori­ties.