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Line 61: − − [[file:the-gravity-method_fig1.png|thumb|{{figure number|1}}Example of observed, regional, and residual Bouguer anomalies.]]
→Data reduction
Corrections are applied to the field observations for instrument drift, tidal effects of the varying position of the sun and moon, the rotation and oblateness of the earth, variations in station elevation, water depths, vehicular motion (for sea and airborne surveys), and terrain. The result is called the Bouguer anomaly, which may be plotted on profiles and contoured on maps.<ref name=pt07r11>Erwin, C. P., 1977, Theory of the Bouguer anomaly: Geophysics, v. 42, p. 1468, DOI: [http://geophysics.geoscienceworld.org/content/42/7/1468.abstract 10.1190/1.1440807].</ref><ref name=pt07r32>LaFehr, T. R., 1991, Standardization in gravity reduction: Geophysics, v. 56, p. 1170, DOI: [http://geophysics.geoscienceworld.org/content/56/8/1170.abstract 10.1190/1.1443137].</ref>
Corrections are applied to the field observations for instrument drift, tidal effects of the varying position of the sun and moon, the rotation and oblateness of the earth, variations in station elevation, water depths, vehicular motion (for sea and airborne surveys), and terrain. The result is called the Bouguer anomaly, which may be plotted on profiles and contoured on maps.<ref name=pt07r11>Erwin, C. P., 1977, Theory of the Bouguer anomaly: Geophysics, v. 42, p. 1468, DOI: [http://geophysics.geoscienceworld.org/content/42/7/1468.abstract 10.1190/1.1440807].</ref><ref name=pt07r32>LaFehr, T. R., 1991, Standardization in gravity reduction: Geophysics, v. 56, p. 1170, DOI: [http://geophysics.geoscienceworld.org/content/56/8/1170.abstract 10.1190/1.1443137].</ref>
==Interpretation==
==Interpretation==