Virginia Forest Harvest Points, 2014-2017

This dataset includes: 1) forest harvest records for Virginia for dates within April 1, 2014 and June 29, 2017 and 2) non-harvested pine and deciduous forest locations. Harvest records were extracted from the Virginia Department of Forestry Harvest Inspection Records, which are maintained with the Integrated Forest Resource Information System. Each point was manually interpreted using high resolution in Google Earth to adjust the location of the point from the landing (i.e., the location on the road where the logs are loaded onto the truck) to the harvested stand, within a 64 m radius buffer.  This facilitates linkage to Landsat or other satellite pixels.  Harvest types include total harvest, thinning, partial cut (including thinning), commercial selection, clear cut, biomass removal, shelterwood deferment, seed tree, and group selection.  Non-harvested pines (Persistent Pine) and deciduous forests (Persistent Deciduous) are also included, but were compiled from areas within the National Land Cover Database evergreen and deciduous classes that were not reported as a harvest in the Virginia Harvest Inspection Records (for any date). ESRI’s random points algorithm (ESRI ArcMap 10.6) was used to generate points that were cross-checked Google Earth historic imagery for evidence of any harvest. Points which had any evidence of harvest were removed. The remaining points were considered to be non-harvested pines or deciduous forest.

Much of this dataset was first described in Thomas et al. 2021. Differences include: 1) non-harvested deciduous forests were added, 2) some harvested deciduous points were removed if they were too close together, 3) this dataset contains the original harvest mechanism description provided by the Virginia Department of Forestry, while Thomas et al (2021) reclassified the harvest types for simplification.

本数据集包含：1) 2014年4月1日至2017年6月29日间弗吉尼亚州的森林采伐记录；2) 未采伐的松树和落叶林位置信息。采伐记录来源于弗吉尼亚州林业部门采伐检查记录，该记录由综合森林资源信息系统维护。每个数据点均通过Google Earth的高分辨率图像进行人工解读，以调整数据点从伐木场（即将木材装上卡车的道路位置）到采伐地的位置，调整范围在64米半径缓冲区内。这有助于与Landsat或其他卫星像素进行关联。采伐类型包括总采伐、疏伐、部分采伐（包括疏伐）、商业选择、皆伐、生物质去除、庇护林延缓采伐、种子树采伐和群组选择。未采伐的松树（持续松树）和落叶林（持续落叶林）亦包含在内，但它们是从国家土地覆盖数据库中未在弗吉尼亚州采伐检查记录中报告为采伐的区域（任何日期）中编制而成。使用ESRI的随机点算法（ESRI ArcMap 10.6）生成数据点，并交叉检查Google Earth的历史影像以确认是否存在任何采伐证据。具有任何采伐证据的数据点被移除。剩余的数据点被视为未采伐的松树或落叶林。此数据集的大部分内容最早在Thomas等人的2021年论文中进行了描述。不同之处在于：1) 添加了未采伐的落叶林；2) 如果某些采伐的落叶点过于接近，则将其移除；3) 本数据集包含弗吉尼亚州林业部门提供的原始采伐机制描述，而Thomas等人（2021）为了简化而对采伐类型进行了重新分类。