Castanea sativa chorology

Distribution map of sweet chestnut (<i>Castanea sativa</i>)<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 geo-databases, scientific and grey 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>Polygon borders delimiting species ranges are generalized across the mainland and sea boundaries. 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. An additional version of polygon ranges are clipped with a coastline (name suffix "clip"), which have been derived from Natural Earth dataset "Admin 0 - Countries" 1:50M version 4.1.0 (https://www.naturalearthdata.com). <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

欧洲栗（*Castanea sativa*）分布地图

本数据集的分布地图通过整合多源异构数据制作而成，数据来源涵盖提供完整物种分布地图的图集专著、从国家级到区域级的植物区系图集、物种出现点地理数据库，以及科学文献与灰色文献。

地图以ZIP归档的ESRI形状文件（ESRI shapefiles，*.shp、*.shx、*.dbf、*.prj）为载体制作。物种分布范围通过两类要素表达：一是多边形要素（文件名后缀为"plg"），用于表征物种的连续分布区域；二是点要素（文件名后缀为"pnt"），用于标识更为破碎且孤立的种群。若存在物种在自然分布区外的人为伴生出现记录，则会附带额外的点/多边形形状文件（后缀为"syn"）。

用于划定物种分布范围的多边形边界已针对陆地与海洋边界进行概化处理，使用者可通过自定义地理信息系统（GIS）数据图层对海洋区域进行掩膜，或裁剪提取陆地分布范围。此外还提供了经海岸线裁剪的多边形范围版本（文件名后缀为"clip"），该版本数据源自自然地球（Natural Earth）数据集"Admin 0 - Countries"1:50M 4.1.0版（https://www.naturalearthdata.com）。

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地图. 《数据简报》（Data in Brief）12, 662-666. DOI: doi.org/10.1016/j.dib.2017.05.007

更多信息与参考文献详见补充材料文档：https://doi.org/10.6084/m9.figshare.5091901

本分布区地图隶属于"欧洲林木树种图集"项目：https://w3id.org/mtv/FISE-Comm/v01