To Add Geocoordinates to an index, use
curl -XPUT http://localhost:9200/syslog-2015.05.18 -d ' { "mappings" : { "log" : { "properties" : { "geo" : { "properties" : { "coordinates" : { "type" : "geo_point" } } } } } } } ';
Of cause, the "syslog-2015.05.18" is variable from installation to installation, I do put Apache logs into the filebeat index.
When You have data in with Geocoordinates, refresh index fields: