Beaver dam locations and beaver activity in the Tualatin Basin, Oregon, between 2013 and 2016

USGS met with 13 local groups and organizations around the Portland, Oregon region to collect information regarding the locations of beaver dams in the Tualatin Basin. The local sources had identified beaver dams between 2013 and 2016, and data were compiled by USGS into an ArcGIS shapefile. Often, the local groups did not know the GPS coordinates of beaver dams, but they had identified beaver-affected reaches during that same time period. Therefore, a second shapefile was created to include the locations of beaver activity (including beaver chews, lodges, and dams) in the Tualatin Basin.

The Beaver Dam Locations ArcGIS shapefile shows the known locations of beaver dams in the Tualatin Basin. The Beaver Activity Locations ArcGIS shapefile shows the known locations of beaver activity (including beaver chews, lodges, and dams) in the Tualatin Basin.

美国地质调查局（USGS）与俄勒冈州波特兰地区周边的13家地方团体及组织开展对接，以收集图阿拉廷盆地（Tualatin Basin）内海狸坝的相关点位信息。这些地方数据源在2013年至2016年间已识别出海狸坝，USGS将采集到的数据整合为ArcGIS形状文件（ArcGIS shapefile）。由于多数地方团体无法提供海狸坝的GPS坐标，但他们在同期已识别出受海狸影响的河段，因此研究团队额外创建了第二份形状文件，用以收录图阿拉廷盆地内所有海狸活动点位，包括海狸啃咬痕迹、海狸巢与海狸坝。
海狸坝点位ArcGIS形状文件展示了图阿拉廷盆地内已知的海狸坝分布点位；海狸活动点位ArcGIS形状文件则呈现了该盆地内所有已探明的海狸活动点位，涵盖海狸啃咬痕迹、海狸巢与海狸坝。