Filters Needed

[thisisashukla]

Proposed filters to be implemented :

• [x] Spatial Filter - taken up by @pan111
• [x] Temporal Filter - WIP by me
• [X] Obsesreved Property Filter - done by me

[thisisashukla]

Spatial Filtering

• [x] Add bounding box control
• [x] Bind it to map layer
• [x] Modify marker properties if needed
• [x] Write logic to for spatial filtering and reseting the marker layer

[thisisashukla]

Temporal Filtering

• [x] Add slider control. Useful links:
  • [x] http://embed.plnkr.co/K5nd6eZAfDfkfyEXHgMI/
  • [x] http://odoe.net/blog/custom-leaflet-control/
• [x] Add necessary functions to the slider
• [x] Bind marker layer to slider control

[thisisashukla]

Property Filter --> Completed in PR #5

• [x] Make changes to markercluster for this filter -> Not implemented in current logic. Issue #889 asks for help on this
• [X] Code DOM elements for property filter -> A checkbox and a dropdown added
• [X] Bind property filter dropdown to markers and markercluster layer
• [X] Used the stationArray for getting sequential access to markers