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Agroclimatology

Ruby client for interacting with the NASA (POWER) Agroclimatology Web Resource

Initial functionality is focused on getting solar radiation data for a given latitude and longitude. Other solar radiation and meteorological query parameters will be available in subsequent versions.

Installation

Add this line to your application's Gemfile:

gem 'agroclimatology'

And then execute:

$ bundle

Or install it yourself as:

$ gem install agroclimatology

Usage

Required params

• latitude
• longitude

Optional params

• year_start (default: 1983)
• year_end (default: current year)

Agroclimatology.fetch(latitude, longitude, year_start, year_end)

Examples

Fetch all solar radiation data

Agroclimatology.fetch(37.752798, -100.017079)

Fetch solar radiation data from 2015 - 2016

Agroclimatology.fetch(-26.660446, 152.964647, 2015, 2016)

[
  {
    :year => "2015",
    :day_of_year => "1",
    :rad_atmosphere => "42.84",
    :rad_surface => "27.47",
    :rad_flux => "34.78"
  },
  {
    :year => "2015",
    :day_of_year => "2",
    :rad_atmosphere => "43.27",
    :rad_surface => "23.00",
    :rad_flux => "34.81"
  },
]

Output

Ruby object containing array of hashes for every day included in year_start - year_end range

• year - Year
• day_of_year - Day of Year
• rad_atmosphere - Average Top-of-atmosphere Insolation (MJ/m^2/day)
• rad_surface - Average Insolation Incident On A Horizontal Surface (MJ/m^2/day)
• rad_flux - Average Downward Longwave Radiative Flux (MJ/m^2/day)

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec 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.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/beaorn/agroclimatology.

Acknowledgments

Data provided by NASA (POWER) Agroclimatology Web Resource

License

The gem is available as open source under the terms of the MIT License (see LICENSE.txt)