A geospatial file format developed by the United States Geological Survey for storing a raster-based digital elevation model. It is an open standard and is used throughout the world (K.-T. Chang (2014)).
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。