说明: Edzer Pebesma (2018). Numerical “map overlay” combines spatial features from one map layer with the attribute (numerical) properties of another. This vignette explains the R method “over”, which provides a consistent way to retrieve indices or attri <longyou1243> 上传 | 大小:284kb
说明: Classes and methods for spatial data in R-Edzer J. Pebesma and Roger S. Bivand (2005) , 教你怎么使用R语言里的SP包来分析空间数据,地理信息数据,GIS数据。 <longyou1243> 上传 | 大小:239kb