wjwillett / us-rivers

Roll your own TopoJSON from NHDPlus.

U.S. Rivers

Also available in massive 3840x2400 resolution, or roll your own using the below instructions.

To install:

brew install p7zip cairo pixman optipng
npm install

If the installation of the node-canvas module fails for you, you can try this after the above:

PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig npm install canvas

To make the above PNG for the entire United States (it’s big!), type make. Or, to make a TopoJSON file for a specific NHD region, specify a target. For example, California:

make topo/18.json

This project was inspired by Nelson Minar’s work on a vector river map.