Revealing Latitude/Longitude from GNIP Activity Streams Format in Splunk

index=twitter geo.coordinates{}="*"| spath path=geo.coordinates{} output=geocoordinates| eval latitude=mvindex(geocoordinates,1)| eval longitude=mvindex(geocoordinates,0)
If you're using GNIP as as data source provider for Twitter data in their "Activity Streams" format, use this search to pull out the geo coordinates from tweets as "latitude & longitude". You'll find that splunk creates a "multivalued" field out of the "geo.coordinates{}" field from a tweet. A mulitvalued field is an array, so by using "mvindex(field,position_in_array_starting_with_zero), we can create new fields on the fly for lat/lon.
Sample Output
JSON Element (before)
geo : {[-]
    coordinates : [
      "-0.9237722",
      "119.8872883"

Splunk Fields (after)
longitude=-0.9237722 latitude=119.8872883 

0
2012-06-19 02:57:40

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