Topography based on Twitter Updates

I am creating a topography based on twitter updates and 4 "hashtags" in order to further analyze site conditions. Longitude and Latitude of the geolocation of a tweet gives the XY coordinates while the Z coordinate is interpret and rises as "amount of tweets in that specific location". My question is: how would it be possible to upload a picture as a mesh in order to deform it from the given coordinates I have collected. Attached to this post I uploaded a video with the logic that I started. 

Plugins Used: @it and Mosquito

Similar Inspiration and research: http://www.formfollowsbehavior.com/2011/01/30/invisible-cities/

Twitter Topo from Jose Fernando Villamizar on Vimeo.