Corylus avellana chorology

Distribution map of common hazel (Corylus avellana)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.2017.05.007 Additional 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普通榛树（Corylus avellana）的分布区地图。本套分布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图谱的图集专著（覆盖从国家级到区域级的各类图集）、物种出现点地理数据库、正式科学文献与灰色文献。本套地图采用ESRI shapefile格式（*.shp、*.shx、*.dbf、*.prj文件）打包存储于ZIP压缩包内。物种分布范围通过两类矢量要素进行可视化：面要素（名称后缀为"plg"）用于界定物种连续占据的分布区域，点要素（名称后缀为"pnt"）用于标识更为破碎、孤立的种群。若存在出现在物种自然分布区之外的人为伴生出现记录，则将附带额外的点要素和/或面要素shapefile文件（后缀为"syn"）。用于界定物种分布范围的面要素边界已针对大陆与海洋边界进行概化处理，使用者可通过自行选择的地理信息系统（GIS）数据图层掩膜海洋区域，或裁剪提取陆域分布范围。此外还有一类经海岸线裁剪的面分布范围版本（名称后缀为"clip"），其海岸线数据源自Natural Earth数据集"Admin 0 - Countries"1:50M 4.1.0版本（访问地址：https://www.naturalearthdata.com）。请按以下格式引用本数据集：Caudullo, G., Welk, E., San-Miguel-Ayanz, J., 2017. 欧洲主要木本物种分布区地图. 《数据简报》(Data in Brief) 12卷, 第662-666页. DOI: doi.org/10.1016/j.dib.2017.05.007。补充信息及所引用文献详见"补充材料"文档：https://doi.org/10.6084/m9.figshare.5091901。本套分布区地图隶属于"欧洲林木树种图集"(European Atlas of Forest Tree Species)项目：https://w3id.org/mtv/FISE-Comm/v01