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A Method of Terrain Correction for Regional Gravity Surveys

By
Liu Wenjin
Liu Wenjin
Institute of Geophysical and Geochemical Exploration, Ministry of Geology and Mineral Resources, Langfang, Hebei.
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Xi Jiajian
Xi Jiajian
Institute of Geophysical and Geochemical Exploration, Ministry of Geology and Mineral Resources, Langfang, Hebei.
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Zhang Xingya
Zhang Xingya
Institute of Geophysical and Geochemical Exploration, Ministry of Geology and Mineral Resources, Langfang, Hebei.
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Published:
January 01, 1989

Abstract

A procedure of terrain correction for regional gravity surveys, which has been extensively adopted in China, is introduced. By using the inverse-square weighted average and bilinear interpolation, altitudes taken from aerophotographic maps for the innermost zone and from the unified nationwide network with the gridding of 1 km × 1 km for the second and outermost zones are interpolated to establish digital terrain models (DTM) for the terrain corrections. Field tests were made in the Qinling Mountains of Shaanxi Province and the Dama Mountains of Jilin Province. The test results show that the accuracy of terrain correction is less than 200 μGal.

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Contents

Society of Exploration Geophysicists Geophysical References Series

An Overview of Exploration Geophysics in China — 1988

Zhao Jingxiang
Zhao Jingxiang
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Wang Yanjun
Wang Yanjun
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Fu Xuexin
Fu Xuexin
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Stanley H. Ward
Stanley H. Ward
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Society of Exploration Geophysicists
Volume
3
ISBN electronic:
9781560802662
Publication date:
January 01, 1989

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