Added geo transfer functions (#661)

* ndvi, slope, aspect, hillshade, mean, binary geotransfer functions * added geography topic to user guide * updated Elevation color ramp * added terrain generation and refactored hillshade * added bump function * added generate_terrain and bump tests * added bumpmap example * added perlin noise and made terrain_generation deterministic
holoviz · Oct 8, 2018 · 441dfb4 · 441dfb4
1 parent 660b78f
commit 441dfb4
Show file tree

Hide file tree

Showing 5 changed files with 1,170 additions and 11 deletions.
diff --git a/datashader/colors.py b/datashader/colors.py
@@ -140,15 +140,7 @@ def rgb(x):
 Hot = ["black", "maroon", "darkred", "red", "orangered", "darkorange", "orange", "gold", "yellow", "white"]
 
 # pseudo terrestial elevation ramp
-Elevation = ["aqua",
-             "saddlebrown",
-             "sandybrown",
-             "darkgreen",
-             "green",
-             "limegreen",
-             "yellow",
-             "palegoldenrod",
-             "white"]
+Elevation = ["aqua", "sandybrown", "limegreen", "green", "green", "darkgreen", "saddlebrown", "gray", "white"]
 
 # Qualitative color maps, for use in colorizing categories
 # Originally from Cynthia Brewer (http://colorbrewer2.org), via Bokeh