For the three hundred sixty-fourth edition of the GeoGearHeads MDSurveyor is back to talk about Benchmarking. He was last on GGH190 talking about it. There is a benchmarking database on Geocaching.com which is how most Geocachers have been introduced to it. But the NGS Data Explorer is more complete. The live video session from this Hangout On Air can be found on YouTube. Subscribe to the feed: Apple Podcasts RSS Stitcher Email: [email protected]