Salix alba chorology

Distribution map of white willow (<i>Salix alb</i>a)<br><br>These maps were produced by combining numerous and heterogeneous data collected from atlas monographs providing complete species distribution maps, from national to regional atlases, occurrence geodatabases and scientific literature.<br>The maps were created using ESRI shapefiles (*.shp, *.shx, *.dbf, *.prj files) archived in the ZIP file. Species range is mapped with polygon features (name suffix “plg”), which define continuous areas of occupancy of the species, and with point features (name suffix “pnt”), which identify more fragmented and isolated populations. If synanthropic occurrences are reported outside the species natural range, additional point and/or polygon shapefiles are also present (suffix “syn”).<br>All polygon borders delimiting the range are generalized across the mainland and sea boundaries, and not clipped to a specific coastline. This offers the possibility to mask sea areas, or to clip and extract the terrestrial range parts using GIS data layers of the users’ choice. <br><br>Please cite as:<br>Caudullo, G., Welk, E., San-Miguel-Ayanz, J., 2017. Chorological maps for the main European woody species. Data in Brief 12, 662-666. DOI: doi.org/10.1016/j.dib.2017.05.007 <br><br>Additional information and used references are on 'supplementary materials' document:<br>https://doi.org/10.6084/m9.figshare.5091901<br><br>Chorological maps are part of the "European Atlas of Forest Tree Species" project:<br>https://w3id.org/mtv/FISE-Comm/v01

白柳（Salix alba）分布图谱

本系列图谱通过整合多源异构数据绘制而成，数据来源涵盖提供完整物种分布图谱的图集专著（覆盖国家级至区域级尺度）、物种出现记录地理数据库以及科学文献。

本图谱采用ESRI形状文件（ESRI shapefiles，包含*.shp、*.shx、*.dbf、*.prj格式文件）打包归档于ZIP压缩包中。物种分布范围通过多边形要素（文件名后缀为“plg”）进行标识，该要素可定义物种的连续栖息区域；同时辅以点要素（文件名后缀为“pnt”），用于标记更为破碎且孤立的种群。若存在物种在自然分布范围之外的伴人出现记录，还会附带额外的点和/或多边形形状文件（文件后缀为“syn”）。

所有划定分布范围的多边形边界已针对陆地与海域边界进行了概化处理，未裁剪至特定海岸线。这一设置允许使用者根据自身需求，通过地理信息系统（GIS）数据图层掩膜海洋区域，或裁剪提取陆地分布范围部分。

请按以下格式引用：
Caudullo, G., Welk, E., San-Miguel-Ayanz, J., 2017. 欧洲主要木本植物物种分布区图谱. 数据简报（Data in Brief）12, 662-666. DOI: doi.org/10.1016/j.dib.2017.05.007

更多补充信息及参考资料可参阅“补充材料”文档：https://doi.org/10.6084/m9.figshare.5091901

本分布区图谱为“欧洲林木树种图集”（European Atlas of Forest Tree Species）项目的组成部分：https://w3id.org/mtv/FISE-Comm/v01