Pixeldistance

PixelDistance calculates the distance in pixels between two geographic points using Google Maps/Leaflet scale levels. This is a Ruby implementation of code found here.

Installation

Add this line to your application's Gemfile:

gem 'pixeldistance'

And then execute:

$ bundle

Or install it yourself as:

$ gem install pixeldistance

Usage

PixelDistance module has only one method, from_coords(lat1,lon1,lat2,lon2,zoom). The output is the distance in pixels.

For example, if I want to find the distance in pixels between a point and a certain centroid in zoom level 12:

pixel_distance = PixelDistance::from_coords(point[:lat], point[:lon], centroid[:lat], centroid[:lon], 12)

Development

After checking out the repo, run bin/setup to install dependencies. Then, 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 to create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

1. Fork it ( https://github.com/[my-github-username]/pixeldistance/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request