[OSM-dev] The OSM planet-sea and the global-ocean

Paul Norman penorman at mac.com
Fri Apr 3 17:06:37 UTC 2015

On 4/3/2015 9:44 AM, Sandor Seres wrote:
> The OSM planet-land is created from the coastline dataset. From time 
> to time it might be reasonable to use the inverse of it, the 
> planet-sea, or even both of them. But, creating the planet-sea is not 
> just a simple exercise. Here is one model/option in bullets how this 
> can be done efficiently.
OSMCoastline generates water polygons, and these are available at 

What isn't generated is simplified water polygons, which are important 
for low-zoom.

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