I can comment a bit on this part. OSMarender is a collection of scripts and software that read the info out of the database (or a part of it) and use Inkscape to render the lines. So it's sort of like it loops through and goes "If the road type is "primary" draw a line of xxx thickness with ____ color from here to there" with various tables storing the color values and sizes. I'm not sure if Mapnik uses the same software to render, but they all read the same data and simply output squares of a certain size showing the roads within it rendered as a raster image. (Although there are PDF output generators as well). So OSMarender does multiple renderings of the areas, once for each zoom level, depending on the level it will include or leave out certain details.
There's a premade OSMarender virtual machine with Linux and everything set up that you can download. It's just a matter of starting up a daemon service and it will crank away rendering the tiles that need updating. There's also a webpage that shows you the priority of tiles waiting in the rendering pipeline and another page that lets you manually request a re-render. But all edits will be re-rendered automatically after a certain amount of time. -DC From: "Ernst Radema" <[email protected]> > Subject: [OSM-newbies] The BIG mapping picture > To: <[email protected]> > o What are OSMarender ( sounds like OpenStreetMaps ) and > > o Mapnik rendering ? > > . Tiling: maps are cut into tiles of 0,25 x 0,25 degrees on a > Tile-server. > >
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