This View of Density
This is a project to see how neighborhood density impacts the environment (land, materials, energy and driving) in a concrete way. Wander around San Francisco and explore many of these neighborhoods in person, and compare it to Sprawl.
There is a more updated version of this calculator, not limited to San Francisco, on the Sierra Club website.
If you have any questions about calculations, improvements, or arguments, please direct them to john.holtzclaw -at- sierraclub.org.