Corylus avellana chorology

Distribution map of common hazel (<i>Corylus avellana</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 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

普通榛树（*Corylus avellana*）分布地图

本数据集的分布地图整合了多源异构数据，数据来源包括提供完整物种分布地图的图集专著、国家级至区域级植物图集、物种出现点地理数据库及科学文献。

本数据集的地图采用归档于ZIP压缩包中的ESRI形状文件（*.shp、*.shx、*.dbf、*.prj）制作。物种的分布范围通过两类要素绘制：一类为多边形要素（名称后缀“plg”），用于界定物种的连续分布区域；另一类为点要素（名称后缀“pnt”），用于标记更为破碎且孤立的种群。若在物种自然分布范围外存在人为伴生的物种出现记录，则会附带额外的点和/或多边形形状文件（后缀“syn”）。

所有用于界定物种分布范围的多边形边界已针对陆地与海洋边界完成概化，未裁剪至特定海岸线。这一设计允许用户根据自身需求，通过自定义GIS数据图层掩膜海洋区域，或裁剪并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地图. *Data in Brief* 12, 662-666. DOI: doi.org/10.1016/j.dib.2017.05.007

更多信息及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"（European Atlas of Forest Tree Species）项目：https://w3id.org/mtv/FISE-Comm/v01