mapnik

sij/mapnik

History

Dane Springmeyer 86f137fd25 recompile stale targets during deploy		2012-07-10 14:50:43 -07:00
..
build.py	link to boost system	2012-02-09 16:00:39 -08:00
hello_datasource.cpp	Revert "update rasterlite, occi, csv, hello_world, and rundemo"	2012-03-09 15:33:36 +00:00
hello_datasource.hpp	Revert "update rasterlite, occi, csv, hello_world, and rundemo"	2012-03-09 15:33:36 +00:00
hello_featureset.cpp	move context's typedef inside to avoid poluting global namespace	2012-01-19 17:36:27 -05:00
hello_featureset.hpp	merge master with feature_impl	2012-01-17 17:47:27 -05:00
Makefile	recompile stale targets during deploy	2012-07-10 14:50:43 -07:00
README.md	make markdown files	2012-07-10 14:28:52 -07:00
test.xml	upgrade syntax to mapnik2	2011-04-09 05:35:25 +00:00

README.md

hello world plugin

This is a very simple sample plugin. It is designed to help developers see the skeletal basics needed to achieve a functional datasource plugin.

Code comments attempt to highlight which code is mandatory, which is simply recommended, and which is purely fluff used to get the plugin to actually show some data.

When added to a map it provides a single point geometry representing the center of any query. This means that it should place a point in the middle of any map tile and display a "hello world!" label if used like:

style hello

Or used in python like:

from mapnik import * m = Map(600,400) m.background = Color('white') s = Style() r = Rule() r.symbols.append(PointSymbolizer()) t = TextSymbolizer(Expression("[key]"),"DejaVu Sans Book",10,Color('black')) t.displacement = (15,15) r.symbols.append(t) s.rules.append(r) m.append_style('style',s) ds = Datasource(type="hello") l = Layer('test') l.styles.append('style') l.datasource = ds m.layers.append(l) m.zoom_all() render_to_file(m,'test.png')