Tag: Paul Trevillion Grid View List View Sort by: Viewed Liked Discussed Title Date Published 17:36 What is a GIS Service? Paul Trevillion gives an overview of GIS services, how to create them, and how to use them. Added: Sep 2nd, 2011. Recorded: Jul 13th, 2011. 21674 views. 1:11:16 What Is Geographic Data and Where Can I Find It? Paul Trevillion and Eric Bowman help you find sources of geographic data that meet your mapping and analysis needs. Local and online sources of existing data as well as methods to create new data, will… Added: Sep 2nd, 2011. Recorded: Jul 12th, 2011. 74655 views, 2 comments, 1 likes this.