Littoral, Environnement et Sociétés Joint Research Unit 7266 Centre National de la Recherche Scientifique, Université de La Rochelle, La Rochelle, France.
PLoS One. 2013 Sep 3;8(9):e73051. doi: 10.1371/journal.pone.0073051. eCollection 2013.
In this communication we introduce marmap, a package designed for downloading, plotting and manipulating bathymetric and topographic data in R. marmap can query the ETOPO1 bathymetry and topography database hosted by the NOAA, use simple latitude-longitude-depth data in ascii format, and take advantage of the advanced plotting tools available in R to build publication-quality bathymetric maps. Functions to query data (bathymetry, sampling information…) are available interactively by clicking on marmap maps. Bathymetric and topographic data can also be used to calculate projected surface areas within specified depth/altitude intervals, and constrain the calculation of realistic shortest path distances. Such information can be used in molecular ecology, for example, to evaluate genetic isolation by distance in a spatially-explicit framework.
在本通讯中，我们介绍了 marmap 包，它是一个用于在 R 中下载、绘制和操作水深和地形数据的工具。marmap 可以查询由美国国家海洋和大气管理局（NOAA）托管的 ETOPO1 水深和地形数据库，使用 ASCII 格式的简单经纬度深度数据，并利用 R 中提供的高级绘图工具来构建出版质量的水深图。通过点击 marmap 地图，可以交互地查询数据（水深、采样信息等）。水深和地形数据还可用于计算指定深度/海拔间隔内的投影表面积，并限制计算实际的最短路径距离。这种信息可用于分子生态学，例如，在空间显式框架中评估遗传距离隔离。
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