Export to ESRI ArcGIS JSON format

[colindean]

ArcGIS apparently cannot consume JSON directly. Fortunately, someone wrote a converter.

https://github.com/Esri/arcgis-to-geojson-utils

Unfortunately, it's written in JavaScript, so we have to either include a Node environment (Brewfile, buildpack, etc.) or port it to Ruby, then include whatever in the build system just like the GeoJSON export.

Node environment.

Establishing a dependency on node.js and including it in our Heroku configuration is probably the quickest solution.

• Add to Brewfile and setup instructions
• Add Node.js buildpack to Heroku configuration
• Integrate conversion script as a Jekyll plugin, just like for GeoJSON

Write conversion in Ruby

The program that does bi-directional conversion is only about 350 lines of JavaScript and has no external dependencies. This indicates that a direct port should be very easy. It could be done as a Ruby gem, too, and then we only need to manage the gem reference in our code.

• Port conversion code to Ruby
• Publish Gem
• Include Gem in Gemfile
• Integrate conversion code as a Jekyll plugin, just like for GeoJSON