For the past few years I have used a slightly modified version of the OSM Mapnik stylesheet on my own website. With the recent change to CartoCSS I transfered my patches across. Both the original raw XML format and the newer CSS type format are quite complicated to modify (although the new format is easier than the old one).
To make creating Mapnik stylesheets even easier I have created a new tool that is somewhat like Spreadnik [1] in that it uses a spreadsheet to define the formatting. Compared to Spreadnik though it is somewhat simpler because one line in the spreadsheet can define everything about a single object type (for example highway=motorway). The spreadsheet has four types of style definition sheet: * shapefiles - for low zoom shapefiles, coastlines etc. * areas - for polygons with optionally: solid fill, pattern fill, outline, label. * lines - for linear features with optionally: casing, fill, tunnel and bridge styles, oneway arrows, up to two labels. * points - for nodes (and optionally polygons) with optionally: symbol, up to two labels. The Perl script that processes the text files (exported from the spreadsheet) will automatically generate a reasonably optimised SQL statement for a group of objects and the styles and layers to draw everything required for each zoom level. I have written a longer description on a web page [2] which also includes a download of the Perl script and the spreadsheet that re-implements ~99% of the OSM map styles (with a few style changes). The download is a bit rough at the moment, more like a dump of my working version. There is also a side-by-side slippy map comparison [3] of the standard OSM stylesheet and this new stylesheet (for the UK only). [1] https://wiki.openstreetmap.org/wiki/Spreadnik [2] http://www.gedanken.org.uk/mapping/custom-maps/ [3] http://www.gedanken.org.uk/mapping/custom-maps/comparison.html -- Andrew. _______________________________________________ dev mailing list [email protected] https://lists.openstreetmap.org/listinfo/dev
