ShapeFile

Shapefile Plugin

This plugin supports reading shapefiles. They can also be read using the OGR Plugin, but the shape plugin is better tested and more mature.

The shapefile plugin will run fastest if you build indexes for your shapefiles using the 'shapeindex' command line tool installed when you build Mapnik.

For other plugins see: PluginArchitecture

Installation

To check if the raster plugin built and was installed correctly you can do:

    >>> from mapnik import DatasourceCache as c
    >>> 'shape' in c.plugin_names()
    True

Parameters

parameter	value	description	default
encoding	string	Encoding Used	utf-8. ESRI Shapefiles are usually 'latin1'
file	string	name of shapefile (without extension)

Styling

To style a layer, use any of the Symbolizers like Point, Polygon, or Line, depending on the geometry type.

Usage

Python

C++

Plugin datasource initialization example code can be found on PluginArchitecture.

A Shapefile datasource may be created as follows:

    {
        parameters p;
        p["type"]="shape";
        p["file"]="path/to/my/shapefile.shp";
    
        // Bridges
        Layer lyr("Vector");
        lyr.set_datasource(datasource_cache::instance()->create(p));
        lyr.add_style("vector");
        m.addLayer(lyr);
    }

XML

    <Layer name="vector" srs="+init=epsg:4236">
            <StyleName>polygon</StyleName>
            <Datasource>
                    <Parameter name="type">shape</Parameter>
                    <!-- you can also point to your shapefile without the 'shp' extention -->
                    <Parameter name="file">/path/to/your/shapefile.shp</Parameter>
            </Datasource>
    </Layer>

Further References