NASA Earth
This is a wrapper for the NASA earth API.
This allows to retrieve pictures taken by the satellite Landsat 8 for any coordinates on Earth, and at any point in time!
Note : You will need to request an API key from NASA to use this gem.
Installation
Simply type :
gem install nasa_earth
Or add this line to your Gemfile :
gem 'nasa_earth'
Imagery endpoint
Retrieve an URL of an image at specific coordinates.
Example
require 'nasa_earth'
n = NasaEarth.new api_key: 'your_api_key'
n.imagery lat: 48.8583701, lon: 2.2944813
=> {"code"=>"200", "message"=>"OK", "content"=>{
"date"=>"2015-08-26T10:40:37",
"url"=>"https://earthengine.googleapis.com/api/thumb?thumbid=d29fb6c5e2259cc02a7634c3f63b1265&token=13516c99554e9196d4e4c50e5c171c92",
"id"=>"LC8_L1T_TOA/LC81990262015238LGN00"}}Parameters
| Parameter | Type | Mandatory | Description |
|---|---|---|---|
| lat | Float | Yes | Latitude |
| lon | Float | Yes | Longitude |
| dim | Float | No | width and height in degrees |
| date | String (format YYYY-MM-DD) | No | date of image |
| cloud_score | Boolean | No | calculate the percentage of cloud |
Assets endpoint
Retrieve different date-time for available imagery at specific coordinates
Example
require 'nasa_earth'
n = NasaEarth.new
n.api_key = 'your_api_key'
n.assets lon: 10.0, lat: 11
=> {"code"=>"200", "message"=>"OK", "content"=>{"count"=>46, "results"=>
[{"date"=>"2013-05-12T09:38:57", "id"=>"LC8_L1T_TOA/LC81870522013132LGN01"},
{"date"=>"2013-05-28T09:39:04", "id"=>"LC8_L1T_TOA/LC81870522013148LGN00"},
{"date"=>"2013-06-13T09:39:00", "id"=>"LC8_L1T_TOA/LC81870522013164LGN00"},
...
]}}Parameters
| Parameter | Type | Mandatory | Description |
|---|---|---|---|
| lat | Float | Yes | Latitude |
| lon | Float | Yes | Longitude |
| begin | String (format YYYY-MM-DD) | No | beginning of date range |
| end | String (format YYYY-MM-DD) | No | end of date range |