About

OGR based Python tools for querrying a data source (SHP, etc) and drawing thematic cartographic representations.

By Nathaniel Vaughn Kelso at Stamen.

Stubs out MSS and MML files based on a dataset for:

• Quick data exploration of what's in a dataset
• Refined cartographic presentations

Installation

Git checkout (requires git)

git clone git://github.com/nvkelso/thematic-carto-tools.git
cd thematic-carto-tools

Includes built in support for CSV/TSV and DBF/SHP files. Uses OGR for other file types.

Usage

Default, just get single sympol maps up (point or poly):

python thematic.py --in_file=sample_data/ne_10m_admin_0_countries.shp --legend-type=single-symbol

Classify a polygon/polyline dataset in 5 steps:

python thematic.py --in_file=sample_data/ne_10m_admin_0_countries.shp --indicator=POP_EST --legend-type=bins --classification-type=quantiles -n 5 --colors=YlGnBu

Separate color for each feature value:

python thematic.py --in_file=sample_data/ne_10m_admin_0_countries.shp --indicator=MAP_COLOR --legend-type=bins --classification-type=unique-values --colors=YlGnBu

Will create 3 files:

1. style.mml - Cascadenik map markup layer file
2. stylesheet.mss - Cascadenik map style sheet file
3. legend.html - See the color breaks in a pretty HTML legend

These files are writen local to where you ran the script. Use the "--out_files" option to specify different names.

Requirements

• Python >= 2.6

• GDAL with OGR support >= ?

Author

• Nathaniel V. KELSO (nvkelso)

Contributors

• Michael Lawrence Evans (mlevans)
• Mike Migurski (migurski)

Coda

Inspired by a fall 2011 workshop held at Stamen about future of Carto and Cascadenik CSS style map rendering in Mapnik & etc.