libgis: new srtm_plus color table

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@54789 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/gis/colors.desc

@@ -33,5 +33,6 @@ ryg: red through yellow to green
 sepia: yellowish-brown through to white
 slope: r.slope.aspect-type slope colors for raster values 0-90
 srtm: color palette for Shuttle Radar Topography Mission elevation
+srtm_plus: color palette for Shuttle Radar Topography Mission elevation (with seafloor colors)
 terrain: global elevation color table covering -11000 to +8850m
 wave: color wave

lib/gis/colors/srtm_plus

@@ -0,0 +1,15 @@
+-11000 0 0 0
+-5000 0 0 70
+-1000 0 10 130
+-50 0 70 225
+0 0 191 191
+0.1 57 151 105
+100 117 194 93
+200 230 230 128
+500 202 158 75
+1000 214 187 98
+2000 185 154 100
+3000 220 220 220
+5000 250 250 250
+8850 255 255 255
+nv 255 255 255