Funding Information: We thank P. Eaton, B. Anderson, and K. Cook for many insightful discussions on the topic, and D. Hale for helpful insight, advice, and his inspiring work with the atomic mesh. We also thank D. Eberly for his correspondence regarding mesh differential geometry. We thank R. Krahenbuhl and J. Sun for helpful discussions. We want to thank our reviewers C. Yao, L. Guo, and one anonymous reviewer for their comments and suggestions. We also express thanks to the associate editor, R. Lane, for extensive help with clarity, content, and detail. We want to thank the Ontario Geological Survey and Natural Resources Canada for making the McFaulds Lake data publicly available. This research was supported in part by Newmont Mining Corporation. Partial funding support was also provided by the industry consortium “Gravity and Magnetics Research Consortium” at the Colorado School of Mines. The sponsoring companies at the time were Anadarko, Bell Geospace, BG-Group, BGP International, BP, CGG, ConocoPhillips, ExxonMobil, Lockheed Martin, Marathon Oil, Micro-g LaCoste, Petrobras, Shell, and Vale. Publisher Copyright: © 2005 Fiona Beveridge. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.