I am using OS Terrain 50 data, mosaicked with R, to make some nice 3D maps using Rayshader. However, for coastal and island areas, there are large gaps where the sea is. How can I easily fill these in in QGIS to prevent gaps in my rayshader model? Screenshot below of what I mean.
There would be several approaches; one tool I would recommend is SAGA Reclassify values (single) in the
Processing Toolbox > SAGA > Raster tools.
Assuming your NoData value is
(1) Activate Reclassify values (single) tool.
(2) Set parameters and run the tool:
- old value =
- new value =
- operator -
The tool will return a new layer
Reclassified Grid of which
-99999 is replaced by
0. Please check the cell value by Identify Features tool.