I need to change the elevation value for a specific DEM raster cell. The first approach did not work as intended and I need to learn how to correctly do this.
Originally, I used a vector point map to identify the coordinates (which are many times finer than the 1m x 1m cell size), then ran v.in.ascii using those x and y coordinates while adding a new z coordinate. The result was rasterized, but that one point did not change the values for all other points within the cell. Can I do this with the GUI in the map display window with the raster digitizer? Locating the specific cell the way I've tried doing this is quite inaccurate. When I display the raster map overlaid with the vector map containing the point of interest (which is on the corner of 4 raster cells), I have not figure out how to get the information for the raster cell because it's the vector map on the top of the stack. So, two questions: 1. How can I identify specific 1m x 1m raster map cells based on the location of a vector map point? Changing opacity of the topmost vector map does not allow me to query the underlying raster map. With the raster map on top of the z-stack I cannot accurately identify the raster cells that need to have their elevations changed. 2. Once I have the proper information to specify specific cells, r.mapcalc allows me to change the elevation value of a point, but how to change the elevation for the entire cell? Looking forward to learning new skills, Rich _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user
