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en:offlinemaps [2021/04/06 10:55] – New caption lineflyeren:offlinemaps [2022/10/20 19:19] (current) – add hillshading ztnfny
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 {{ :en:offlinemap_advanced_themeoptions_2.jpg?direct&400 |}} {{ :en:offlinemap_advanced_themeoptions_2.jpg?direct&400 |}}
 +
 +==== Hillshading ====
 +
 +Hillshading is a technique for creating topographic relief maps by adding a lighting effect to the map to indicate changes in elevation. Sloped will be darkened/lightened to generate a 3D-effect.
 +
 +=== How to use hillshading in c:geo? ===
 +
 +Hillshading is available only with offline maps. To use it configure a folder containing the hilldshading definition files in "Settings > Map > Map Shading Files Folder".
 +
 +=== Where to get hillshading files? ===
 +
 +Multiple sources exist for hillshading files with different coverage and resolution. The files are required in "hgt" format and must be placed in your devices "Map Shading Files Folder".
 +
 +Most sources offer them by degree-coverage with popular sizes being 1" (1x1°, resolution of 30m) and 3" (3x3°, resolution 90m).
 +
 +Sources:
 +
 +^ URL                                                                          ^ Coverage                 ^ Resolution ^
 +| https://sonny.4lima.de                                                       | Europe                   | 1", 3"     |
 +| http://viewfinderpanoramas.org/dem3.html                                     | World                    | 3", 15"    |
 +| http://viewfinderpanoramas.org/Coverage%20map%20viewfinderpanoramas_org1.htm | USA, Europe, New Zealand | 1"         |
 +
 +=== Hillshading and custom themes ===
 +Hillshading requires support by the map theme. If you placed the files correctly but are not seeing any hillshading it might be due to your map theme. Switch to c:geos "default" map theme to see if it's working then.
 +
 +If that's the case please use another map theme or contact your map themes author to support hillshading.
  
 ===== Further reading on offline maps ===== ===== Further reading on offline maps =====
en/offlinemaps.txt · Last modified: by ztnfny

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