https://github.com/lmullen/nghis-simplifier

Simplify NGHIS shapefiles for, among other uses, CartoDB
https://github.com/lmullen/nghis-simplifier

Last synced: 27 days ago
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Simplify NGHIS shapefiles for, among other uses, CartoDB

• Host: GitHub
• URL: https://github.com/lmullen/nghis-simplifier
• Owner: lmullen
• Created: 2016-02-22T15:54:20.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2016-03-04T21:07:11.000Z (almost 9 years ago)
• Last Synced: 2024-10-28T04:59:16.150Z (3 months ago)
• Language: Makefile
• Size: 1.95 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Makefile to convert NHGIS shapfiles for CartoDB

[NHGIS](https://www.nhgis.org/) is awesome for providing high quality shapefiles keyed to each U.S. Census. But these are too high-resolution and in the wrong projection to upload to [CartoDB](https://cartodb.com/), which is often useful for teaching. This is a Makefile which will convert those NHGIS shapefiles into a format that you can use in CartoDB.

Make sure you have the geospatial tools you need. On a Mac:

```

brew install gdal

brew install node

npm -g install mapshaper

```

On Ubuntu:

```

sudo apt-get install gdal-bin

sudo apt-get install node npm

sudo npm -g install mapshaper

```

Then download all the NGHIS shapefiles that you want, including unzipping the zip files for individual shapefiles. In other words, all the `*.shp`, `*.dbf`, `*.prj` etc., etc., etc., from NHGIS go in the same directory as this Makefile.

Then run `make` and you'll get a directory `simplified` with the simplified shapefiles and `cartodb` with zipfiles of those simplified shapefiles that you can upload to CartoDB.