CartoGrass

Import and Export CARTO datasets as GRASS GIS maps, using the GrassGis Ruby Gem.

Works with GRASS 7.x and only with vector geometry.

Add this line to your application's Gemfile:

gem 'cartograss'

And then execute:

$ bundle

Or install it yourself as:

$ gem install cartograss

You'll need a CARTO engine account (that is, one with an authorized API KEY). The api key will actually needed to export data to CARTO or import from private CARTO datasets.

This example fetches some data from your CARTO account, then processes it in GRASS and sends the results back to CARTO so they can be visualized in web maps.

require 'cartograss'

grass_config = {
  # ...
}

GrassGis.session grass_config do
  extend CartoGrass

  # Bring-in a dataset from CARTO.
  # It is automatically reprojected for the current locations
  carto_import(
    user: 'carto_username',
    api_key: 'secret_api_key',
    dataset: 'mydataset'
  )

  # ... process mydataset with GRASS tools ...

  # Now save the changed dataset back to CARTO.
  carto_export(
    user: 'carto_username',
    api_key: 'secret_api_key',
    input: 'mydataset',
    dataset: 'mydataset'
  )
end

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/jgoizueta/cartograss. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.