initial

Author: jsimpson

.gitignore

@@ -0,0 +1,5 @@
+.ruby-gemset
+.ruby-version
+
+imgs/*
+*.gif

README.md

@@ -0,0 +1 @@
+Just a quick script that scrapes the US Drought Monitor weekly images and creates a GIF based on the chosen start date and number of weeks.

drought.rb

@@ -0,0 +1,39 @@
+require 'fileutils'
+require 'highline/import'
+require 'open-uri'
+require 'rmagick'
+
+include Magick
+
+BASE_URI = 'http://droughtmonitor.unl.edu/data/pngs'
+
+def filename(d)
+  "imgs/#{d.strftime('%Y%m%d')}_west_date.png"
+end
+
+def url(d)
+  "#{BASE_URI}/#{d.strftime('%Y%m%d')}/#{d.strftime('%Y%m%d')}_west_date.png"
+end
+
+_date = ask('Enter a start date (MM/DD/YYYY): ').split('/')
+date = Date.new(_date[2].to_i, _date[0].to_i, _date[1].to_i)
+
+weeks = ask('Enter number of weeks to scrape images for: ').to_i
+
+FileUtils.rm_rf('imgs/') if File.exists?('imgs/')
+Dir.mkdir('imgs')
+
+(0..weeks).each do
+  begin
+    File.open(filename(date), 'wb') { |f| f.write(open(url(date)).read) }
+  rescue OpenURI::HTTPError
+    File.delete(filename(date))
+  end
+
+  date = date - 7
+end
+
+gif = ImageList.new(*Dir['imgs/*.png'].sort)
+gif.delay = 80
+gif.write('drought.gif')
+