Skip to main content

Cascading Stylesheets For Mapnik

Project description

Cascadenik
==========

Cascadenik implements cascading stylesheets for Mapnik.

It’s an abstraction layer and preprocessor that converts special, CSS-like
syntax into Mapnik-compatible style definitions. It’s easier to write complex
style rules using the alternative syntax, because it allows for separation of
symbolizers and provides a mechanism for inheritance.

Cascadenik supports many of Mapnik’s features in a simple declarative form:

/* Define a few colors */
@black: #000;
@orange: #f90;

/* Start with a white background */
Map
{
map-bgcolor: #fff;
}

/* Draw roads as orange lines */
#roads
{
/* Usually, 3px wide */
line-width: 3;
line-color: @orange;

/* Make the important ones wider */
&[kind=major] { line-width: 4 }
&[kind=highway] { line-width: 5 }

/* Add the road names in black */
name
{
text-placement: line;
text-face-name: "DejaVu Sans Book";
text-fill: @black;
text-size: 12;
}
}

See more examples at https://github.com/mapnik/Cascadenik/wiki/Examples.

Usage
-----

See `INSTALL.md` for installation instructions.

See the `doc/` folder for more usage examples.

Unroll the rules in example.mss and show their cascade order:

% cascadenik-style.py example.mss > example-ordered-unrolled.mss

Compile `example.mml` into a Mapnik-suitable XML file:

% cascadenik-compile.py example.mml example-compiled.xml

Render a MML file directly to an image using nik2img.py:

% nik2img.py example.mml example.png

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

cascadenik-2.7.0.tar.gz (54.2 kB view hashes)

Uploaded Source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page