Storing LatLonType in solr : how to insert them via solrj

I am going to index a lot of document using GeoSpatial from solr3.1. I can't find a way t开发者_如何学Goo add document with solrj passing latitude and longitude. Querying seems to be working.

How can I insert on a LatLonType from solrj ?

Thanks for you time.

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doc.addField("latlon", "19.2579,72.9862");