jgg     2015 35 (6):  945-947    ISSN: 0412-1961  CN: 21-1139/TG Application of EGM2008 Model in GPS Elevation Survey Guizhou Survey &Design Research Institute for Resources and Hydropower, 27 South-Baoshan Road, Guiyang 550002,China Received: 2014-09-25  Revised: null  Online: 2015-12-01 Supporting info