Three word location: Difference between revisions

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 {{draft task}}
+If one were to enter the words: 'softly affiliate activation' at the what3words.com site, the response would be a location in Walt Disney World.  The latitude and longitude for that spot is 28.3852 -81.5638.  Using that service enables anyone to specify any place on the Earth with three words.
- Three Word Location.
- Display a location on the Earth with three words derived from a
- latitude longitude pair.
- For:
- latitude = 28.3852
- longitude = -81.5638
- Display: W18497 W11324 W01322
- Implementation:
- Build a synthetic word array of 28126, 6 character words
- in the form W00000 thru W28125.
- Convert latitude and longitude into positive integers.
- Build a 43 bit integer containing latitude (21 bits) and longitude (22 bits).
- Isolate most significant 15 bits for word 1 index.
- Isolate next 14 bits for word 2 index.
- Isolate next 14 bits for word 3 index.
- Fetch each word from the word array.
- Display the words.
- Reverse the procedure and display the original latitude and longitude.
+Task: Provide a similar solution - Display a location on the Earth with three words derived from a latitude longitude pair.
+For: latitude = 28.3852 longitude = -81.5638   Display: W18497 W11324 W01322
+Implementation:
+Build an array of 28126, 6 character words in the form W00000 thru W28125.
+Convert latitude and longitude into positive integers.
+Build a 43 bit integer containing latitude (21 bits) and longitude (22 bits).
+Isolate most significant 15 bits for word 1 index.
+Isolate next 14 bits for word 2 index.
+Isolate next 14 bits for word 3 index.
+Fetch each word from the word array.
+Display the words.
+Reverse the procedure and display the original latitude and longitude.
+Extra credit:  Find a way to populate the word array with actual words.