Vegetation classification crosswalk database for use in GIS to synchronize vegetation map layers of the NPS Great Lakes Network to the U.S. National Vegetation Classification

The geodatabase contains 13 relate tables that together provide updated and synchronized classifications to an existing vegetation map layer for each of the nine park units in the Great Lakes Network (GLKN) of the National Park Service (NPS) Natural Resource Inventory and Monitoring Program. The classifications include 1) vegetation types at every hierarchical level in the 2015 version of the U.S. National Vegetation Classification (USNVC) and 2) map classes that represent vegetation and land cover in the vegetation map layers. Furthermore, the tables provide a crosswalk between the two classifications (vegetation and map). Each park unit in GLKN has received, at different times over several years, vegetation data products from the NPS Vegetation Mapping Inventory (VMI) Program. However, the vegetation and map classifications were at different stages of development over these years. With this geodatabase product, having a series of already linked relate tables, the original vegetation map layer for each park unit can be linked to the updated and synchronized classification information for both vegetation types and map classes.本地理数据库（geodatabase）包含13个关联表，可为美国国家公园管理局（NPS）自然资源清查与监测项目下属大湖网络（GLKN）的9个公园单元，分别为其现有植被图层提供经更新且同步统一的分类结果。本次采用的分类体系涵盖两部分内容：1）美国国家植被分类系统（USNVC）2015版中所有层级的植被类型；2）植被图层中表征植被与土地覆盖的制图分类单元。此外，上述关联表还提供了植被分类与制图分类两类体系之间的转换映射对照表。多年以来，GLKN的各公园单元已在不同时段陆续获取了NPS植被制图清查（VMI）项目产出的植被数据产品，但在该周期内，植被分类与制图分类的开发进程并不统一。依托本地理数据库产品所包含的一系列预关联关联表，可将每个公园单元的原始植被图层，与更新完成且已同步的植被类型及制图分类信息进行关联匹配。