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Frequently Asked Questions

What is Bluebooking?

Bluebooking is the name given to the process of submitting a geodetic control survey to the National Geodetic Survey (NGS) for inclusion in the National Spatial Reference System (NSRS). There are two types of bluebook surveys: GPS: This type of survey is typically done to establish horizontal and lower order vertical control in an area, typically a city or county. Vertical: Differential leveling is done to establish higher order vertical control on benchmarks.

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What is a deformation Survey?

A deformation survey is done periodically to monitor a structure or the environment for movement or deformation. This is typically done for large man made objects such as buildings, dams, bridges, etc, as well as rock cuts, surface areas over underground mines, and earthquake fault zones.

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