jgg     2015 35 (6):  948-952    ISSN: 0412-1961  CN: 21-1139/TG A Strategy for Upgrading the Interpolation Accuracy of Gravity Map Based on Wavelet Analysis College of Automation, Harbin Engineering University, 145 Nantong Street, Harbin 150001, China Received: 2014-12-12  Revised: null  Online: 2015-12-01 Supporting info