Display Grids as Overlay Layers in Sahana Eden

Grid types

• Lat/Lon
  • Status: Done: We have a Vector layer added by cdauth
  • Q: Should we replace this with OpenLayers.Control.Graticule?
• UTM/MGRS (NB These aren't regular!)

Options:

• WMS
  • ​http://earth-info.nga.mil/GandG/coordsys/gislayers/gislayers.html
• KML
  • PHP code to create (inaccurate?): ​http://www.nearby.org.uk/google.html#17
    • Offline version: ​http://www.nearby.org.uk/blog/2007/06/19/mgrs-layer-for-google-earth-offline/
• TileCache
  • ​http://github.com/migurski/GridTile
    • Grid only at Low Resolutions
    • Grid fails in SphericalMercator

MGRS calculations in JS (this file already in static/scripts/gis as used by the MGRS PDF finder:

• ​http://haiticrisismap.org/js/usng2.js

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GIS BluePrints