adityam/filter — pull request #9 by reviczky (2012-10-21 16:45:43+00:00)
Title: Adding OSM (OpenStreetMap) webfilter

Adding a webfilter for integrating OSM maps (png,jpeg,svg,pdf).
=================================================

Minimal example:
------------------------
```
\usemodule[webfilter]
\enabledirectives[schemes.cleanmethod=md5]
\enabletrackers [thirddata.webfilter]

\starttext
\startOpenStreetMap
bbox=4.045,51.708,4.212,51.771
scale=43500
format=pdf
\stopOpenStreetMap
\stoptext
```

Parsing URL
-----------------
http://parent.tile.openstreetmap.org/cgi-bin/export?bbox=4.045,51.708,4.212,51.771&scale=435000&format=png