Azavea Commons

Through our research projects, pro bono work and other activities, we sometimes create something we feel has potential value for others, such as a new dataset, map, tool or even complete software.  We are pleased to make these available to the wider community here, in Azavea Commons.


Open Source Software Projects

Title Description Last Updated License

GeoTrellis is a high-performance geoprocessing toolkit designed to optimize speed, scale, and an open architecture. To learn more, check out ourproduct site, or the GeoTrellis documentation site.

Visit GitHub Project
GeoTrellis is released under the GPL v3 license, and optionally other commercial licenses.

DistrictBuilder is web-based software designed to give governments and the public transparent, accessible, and easy-to-use on-line redistricting tools. For more information, check out our product page.

Visit GitHub Project
DistrictBuilder is released under the Apache 2.0 license.
Open Data Catalog

Open Data Catalog is an open-source version of the site code behind, a portal that provides access to over 100 open data sets, applications, and APIs related to the Philadelphia region. Open Data Catalog is based on Django and is intended to display information and links to publicly available data in an easily searchable format.

Visit GitHub Project
Open Data Catalog is released under an MIT license.

OpenTreeMap is a wiki-inspired, web-based geographic tree inventory application that enables individuals, organizations, and governments to work together to collaboratively map the urban forest. OpenTreeMap is a project of Azavea, Urban Forest Map, and Urban Ecos. For more information, look at our product page.

Visit GitHub Project
OpenTreeMap is released under the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.


Open Source Tools, Libraries, and Utilities

Title Description Last Updated License
ACS Alchemist


The ACS Alchemist is a GUI desktop tool that allows easy access and extraction of specific portions of the US Census Bureau's American Communities Survey data.

Visit GitHub Project

Download Windows installer
ACS Alchemist is released under the GNU General Public License, and comes with no warranty.
Azavea Minifier / Blend

The Azavea Minifier combines JsLinting, merging multiple files, and minifying via the YUI Compressor all into one simple and configurable build step.

The "Blend" project is an evolution of the minifier inspirered by the Ruby on Rails asset pipeline that merges, analyzes, and optimizes client-side assets for web applications and static web sites.

Visit Minifier GitHub Project

Visit Blend GitHub Project
The Azavea Minifier, and its evolutionary cousin Blend, are released under MIT licenses.

Maps .NET objects to data sources (databases, files, REST APIs, etc). Similar to NHibernate, but with a different philosophy. Designed to be simple enough for anyone to use and fast enough for extremely high throughput on very large data sets.

Visit GitHub Project
FastDAO is released under an MIT license.

There are dozens of geocoding systems on the market. We didn’t want to invent yet another one, but we wanted to be able to use the many systems in a common manner. The OMGeo library is a set of extensible classes written in both Python and C# for interacting with several geocoding providers.

Visit Python GitHub Project 

Visit C#/.NET GitHub Project 
net-OMGeo and python-OMGeo are released under MIT licenses.
Scriptable JSLint

A command-line version of JsLint that runs in both Windows Script Host and Rhino.

Visit GitHub Project
This modified version of JsLint is released under the original JsLint license (view the file for the full license text).


Maps and Data sets

Title Description Last Updated License
Philadelphia Neighborhoods Map

Philadelphia, like its East Coast cousins in Baltimore, Boston and New York, is a city of neighborhoods. There have been many definitions of those neighborhoods over the years.  Our take on them, compiled from several sources, is available through:

03/20/2013 Creative Commons License

Philadelphia Neighborhoods Map by Azavea Incorporated is licensed under a Creative Commons Attribution 3.0 United States License.
Philadelphia Transit Map

We prepared this map as part of a pro bono project for Peregrine Arts, but it's applicable for printing out transit maps for other purposes as well.  It was designed for 'E' size paper, but it's a PDF so it can be printed at any size.

Download the .pdf file
(File size: 4.62 MB)
6/7/2008 Creative Commons License

Philadelphia Transit Map by Azavea Incorporated is licensed under a Creative Commons Attribution 3.0 United States License.
Sesquicentennial Map

Held in Philadelphia in 1926, the Sesquicentennial International Exposition celebrated the 150th anniversary of the signing of the Declaration of Independence. A collection of Sesquicentennial photos is now available on Since the location of the Exposition has changed a bit since 1926, we combined a current street map with a map of the Sesquicentennial grounds to create this two-layer map that makes it easy to see exactly where the festivities occurred.

Download the .pdf file
(File size: 4.62 MB)
10/21/2008 Creative Commons License

Map by Azavea Incorporated is licensed under a Creative Commons Attribution 3.0 United States License.