Roll your own TopoJSON from the National Atlas one million-scale dataset.
This repository provides a convenient mechanism for generating TopoJSON files from the National Atlas one million-scale dataset.
Before you can run
make, you’ll need to install some needed software. Here’s how to do that using Homebrew on Mac OS X:
brew install nodebrew install gdal
And then, from this repository’s root directory, install the dependencies:
Once you have everything installed, simply run:
This will generate a large number of TopoJSON files of varying size in the
topo directory. As a by-product of producing these files, you’ll also download the one million-scale shapefiles directly from the National Atlas and convert them into GeoJSON and filter using
If you want to generate a custom map, I recommend modifying the Makefile. Or, just use the Makefile as a set of examples, and run the appropriate
topojson commands from the terminal.