My, Your, Their Data SUCKS by Paul Ramsey, Ep 60 by Paul Ramsey

Where is here? That place on a map is relative to a road line, which was digitized on a 5-years-ago satellite image, which was ground referenced to an existing road intersection, which was captured 35 years ago from an aerial photo, which was ground referenced to a control point, which was optically sighted relative to mountain-top control points, which were first occupied 150 years ago. Distributed by Tubemogul.