January 2012
Intermediate to advanced
248 pages
7h 23m
English
Content preview from Programming GPS and OpenStreetMap Applications with Java
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108 8. Making Maps Navigable
reduce highway file to leave only motorway.highway tags;
reduce railway file . . . .
The goal is to balance the reduction of map data with, for example, the
rendering in Kosmos to get a smooth performance (and space) distribution.
Since the aim of the GER project is a full country map, all details on the
city level can be reduced by building related attributes, etc.
In the product-definition phase, an interactive tool like JOSM can also
help a lot: The 30 MB file germany.highways.osm can be opened with JOSM,
<CTRL><A> selects all the map data and all attributes are shown. By
clicking an attribute line and <DEL> the attributes ...
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