notes/osgb36_to_wgs84_notes.txt


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These notes are for the FMS migration from OSGB36 to WGS84 coordinates.

Reference:

  easting  === longitude
  northing === latitude
  
  http://en.wikipedia.org/wiki/Ordnance_Survey_National_Grid
  http://en.wikipedia.org/wiki/World_Geodetic_System

DB:

  * dump schema from live db and confirm it matches schema.sql (you never know...)
  DONE: use PledgeBank's 'nearby' logic in problem_find_nearby() SQL function
  DONE: in 'alerts' table convert parameter and parameter2 if alert is 'local_problems' or 'local_problems_state'

CODE:

  DONE: update all calls to problem_find_nearby swapping parameter order.
  * find all occurences of 'easting', 'northing', $e, $n etc and migrate

UI maps:

  * Tilma js code will still need eastings and northings
  * All other maps should be able to switch to latlon