Erratum for “Measuring Land Subsidence Using GPS: Ellipsoid Height versus Orthometric Height” by G. Wang and T. Soler

Wang, Guoquan; Soler, Tomás

doi:10.1061/(ASCE)SU.1943-5428.0000145

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Mar 30, 2015

Erratum for “Measuring Land Subsidence Using GPS: Ellipsoid Height versus Orthometric Height” by G. Wang and T. Soler

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Authors: Guoquan Wang, M.ASCE [email protected], and Tomás Soler, M.ASCE [email protected]Author Affiliations

Publication: Journal of Surveying Engineering

Volume 141, Issue 3

https://doi.org/10.1061/(ASCE)SU.1943-5428.0000145

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Please note a correction to the caption of Fig. 1. The phrase “the angles between the normal to the geoid” should be changed to “the angles between the normal to the ellipsoid.” The correct caption is given below.

Fig. 1. The relationship of ellipsoid height ( $h$ ), orthometric height ( $H$ ), and geoid height ( $N$ ) at a GPS site (PA01) in Houston, TX; the angles between the normal to the ellipsoid and the normal to the geopotential surface at $A$ (and the geoid at $D$ ) are known as the deflections of the vertical; the angles ( $θ$ and $θ'$ ) are exaggerated for the purpose of illustration

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Journal of Surveying Engineering

Volume 141 • Issue 3 • August 2015

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Received: Dec 5, 2014

Accepted: Jan 23, 2015

Published online: Mar 30, 2015

Published in print: Aug 1, 2015

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Guoquan Wang, M.ASCE [email protected]

Associate Professor, Dept. of Earth and Atmospheric Sciences, National Center for Airborne Laser Mapping, Univ. of Houston, Houston, TX 77204. E-mail: [email protected]

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Tomás Soler, M.ASCE [email protected]

Chief Technical Officer, Spatial Reference System Division, National Geodetic Survey, National Oceanic and Atmospheric Administration, Silver Spring, MD 20910. E-mail: [email protected]

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