A USGS elevation benchmark in Bryce Canyon National Park. Photo: Alex Demas, USGS, public domain.

Survey Markers and Benchmarks

Mark Altaweel

Benchmarks are a type of survey markers whose elevations have been surveyed as accurately as possible based on the technology at the time.

Land Surveying and GIS Revisited: An Unnecessary Drama

Joseph Magnotta

Joseph Magnotta presents an opinion piece about the relationship between surveyors and the GIS industry and why it doesn't need to be contentious.

Why GIS Doesn’t Replace the Need for Surveyors

GIS Contributor

With all the readily available aerial and satellite imagery, it is a legitimate questions to ask if GIS can be ...