Quercus ilex chorology

Distribution map of holm oak (Quercus ilex)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.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").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).Please cite as: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.2017.05.007Additional information and used references are on 'supplementary materials' document:https://doi.org/10.6084/m9.figshare.5091901Chorological maps are part of the "European Atlas of Forest Tree Species" project:https://w3id.org/mtv/FISE-Comm/v01

冬青栎（Quercus ilex）分布地图。本套地图通过整合多源异质数据制作而成，数据来源涵盖提供完整物种分布地图的国家级至区域级植物志图集、物种发生点地理数据库、科学文献及灰色文献。地图以ESRI形状文件（ESRI shapefiles）存储，相关文件包含*.shp、*.shx、*.dbf、*.prj格式，并打包为ZIP压缩包。物种分布范围通过两类要素表示：其一为多边形要素（文件名后缀"plg"），用于界定物种的连续栖息区域；其二为点要素（文件名后缀"pnt"），用于标识更为破碎、孤立的种群。若存在人为伴生的物种发生记录位于其自然分布范围之外，则将附带额外的点或多边形形状文件（文件名后缀"syn"）。用于界定物种分布范围的多边形边界已针对大陆与海域边界进行概化处理，支持使用者通过自选地理信息系统（GIS）数据图层对海域进行掩膜操作，或裁剪提取陆地分布范围部分。另有一类经海岸线裁剪的多边形分布范围版本（文件名后缀"clip"），其海岸线数据源自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. 欧洲主要木本物种分布区划图. 《数据简报（Data in Brief）》12, 662-666. 数字对象标识符（DOI）：doi.org/10.1016/j.dib.2017.05.007。更多相关信息及参考文献详见"supplementary materials"文档：https://doi.org/10.6084/m9.figshare.5091901。本套分布区划图为"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