2011/6/20 Parveen Arora <m...@parveenarora.in>: > On Mon, Jun 20, 2011 at 9:54 PM, M∡rtin Koppenhoefer > <dieterdre...@gmail.com> wrote: > Hi Koppenhoefer >> The shapefiles are used in this layer (in inc/ ): >> http://svn.openstreetmap.org/applications/rendering/mapnik/inc/layer-shapefiles.xml.inc >> >> As you can see the simple boundaries are used only in z1-3 and the >> populated areas in z3 and 4. There is also a shape called "built-up" >> used in z8-10 which I am not sure what it is, but it might be also >> populated areas. Above z10 there is only OSM-Data (and coastlines) >> used. > So means that all are required to generate the map below z10. > There are files of populated places, admin boundary lines, processed, > shoreline and world boundaries spherical. > > what is the meaning by spherical world boundaries.
I'd guess that "spherical" is a reference to spherical mercator, but I don't actually see the word "spherical" in the style-sheet for the shapefiles I linked above. Actually for rendering the world you only "need" the coastlines (which are used to overlay land over the ocean=canvas). There is 2 files of them for different detail. The other files contain simplified data of what is (mostly) in higher resolution / acuracy in OSM, so they only speed up rendering, but with modified stylesheets you can also do without them. cheers, Martin _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
