摘要:
2008-05-30 16:36PLEASE NOTE: This is a preliminary release of the North American 30 arc-second DEM. Constructive comments from users of this data set are greatly appreciated. Please contact Kris Verdin (kverdin@dg1.cr.usgs.gov) or Sue Jenson (jenson@dg1.cr.usgs.gov) with your comments.Data Set Assem 阅读全文
posted @ 2011-03-23 19:23 tianya10319 阅读(2164) 评论(0) 推荐(0) 编辑