Celtis australis chorology

Distribution map of nettle tree (Celtis australis)<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

欧洲朴树（Celtis australis）分布范围图

本数据集的分布范围图通过整合多源异构数据制作而成，这些数据涵盖了提供完整物种分布图谱的专题图集、从国家级到区级的地区图鉴、物种出现点地理数据库以及科学文献。

本图集采用ESRI形状文件（*.shp、*.shx、*.dbf、*.prj）制作，所有文件打包存储于ZIP压缩包中。物种分布范围通过两种要素表达：一是多边形要素（文件名后缀为“plg”），用于标识该物种的连续分布区域；二是点要素（文件名后缀为“pnt”），用于标注更为破碎且孤立的种群。若存在该物种在自然分布范围外的伴人生境出现记录，则会附带额外的点和/或多边形形状文件（后缀为“syn”）。

所有用于界定分布范围的多边形边界已针对大陆与海洋边界进行了概化处理，并未裁剪至特定海岸线。这一设计允许用户根据自身需求，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。

引用格式如下：
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

更多相关信息与引用文献详见补充材料文档：
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