Populus nigra chorology

Distribution map of black poplar (<i>Populus nigra</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

欧洲黑杨（*Populus nigra*）分布格局图<br><br>本数据集的分布格局图通过整合多源异构数据绘制而成，数据来源涵盖提供完整物种分布地图的专题图集、国家至区域级森林图集、物种出现点地理数据库，以及学术与灰色文献。<br><br>该分布图采用打包于ZIP归档文件中的ESRI形状文件（ESRI shapefile，格式包含*.shp、*.shx、*.dbf、*.prj）制作。物种分布范围通过两类要素表征：面要素（文件名后缀“plg”）用于划定物种的连续分布区域，点要素（文件名后缀“pnt”）用于标识更为破碎且孤立的种群。若有记录显示物种出现于其自然分布范围之外的人为伴生生境，则会附带额外的点/面形状文件（后缀“syn”）。<br><br>划定物种分布范围的面要素边界已针对陆地与海洋边界进行概化处理，支持使用者通过自选的地理信息系统（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。此外还提供经海岸线裁剪的面要素范围版本（文件名后缀“clip”），该版本的数据源自Natural Earth数据集"Admin 0 - Countries" 1:50M 4.1.0版（https://www.naturalearthdata.com）。<br><br>引用格式如下：<br>Caudullo, G., Welk, E., San-Miguel-Ayanz, J., 2017. 欧洲主要木本植物物种分布格局图. 《Data in Brief》12, 662-666. DOI: doi.org/10.1016/j.dib.2017.05.007<br><br>更多相关信息与参考文献详见补充材料文档：<br>https://doi.org/10.6084/m9.figshare.5091901<br><br>本分布格局图隶属于“欧洲林木图集”（European Atlas of Forest Tree Species）项目：<br>https://w3id.org/mtv/FISE-Comm/v01