[OSM-dev] speeding up loading an OSM dump into PostGIS?

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Thu Dec 1 14:18:30 GMT 2011


On 12/1/2011 8:39 AM, Richard Fairhurst wrote:
> Source material:
> https://github.com/kothic/kothic-js/wiki/Tiles-format
> https://github.com/kothic/kothic-js/wiki/How-to-prepare-map-style

Just found the following at the first link:

> All coordinates of features should be Spherical Mercator integers. To 
> save bandwidth and disk space, they are calculated to be relative to 
> tile boundaries: [0,0] represents lower right corner, and 
> [/granularity/, /granularity/] represents upper right.

Regarding [0,0] is the "lower right" and [g,g] is the "upper right", 
where does the "left" come in?  Typo, or really intended to be that way?

Lynn (D) - KJ4ERJ - Author of APRSISCE and looking for a "C" lightweight 
local renderer

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