Aspen Characteristics - Klamath National Forest [ds369]

<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The database represents point locations and associated stand assessment data collected with known aspen stands in the Klamath National Forest, Siskiyou County, California. The associated Klamath National Forest Region 5 Existing Vegetation aspen layer (KLAMATH_NF_KNF_VEG_POLY) was derived from LANDSAT TM imagery, SPOT imagery, orthophotos, aerial photos and auxiliary layers (Source data: Region 5 Forestland And Resource Data Base GIS And Oracle Data Dictionary 4/14/95'.) The stands were classified based upon conditions such as primary and dominant tree species, tree size, and tree density as determined by both the CALVEG system and California Wildlife Habitat Relationships system. Associated with this point layer is a polygon layer (KLAMATH_NF_KNF_VEG_POLY) containing aspen stands delineated in conjunction with the aspen assessment information. Data Compilation: The Aspen Delineation Project (ADP) is a collaborative effort of the U.S. Forest Service's Pacific Southwest Region, the California Department of Fish and Games Resource Assessment Program, and the California Office of Bureau of Land Management. Principal Investigator for ADP is David Burton; visit: www.aspensite.org for more information regarding the ADP. The Department of Fish and Games, Resource Assessment Program compiled this information from the collaborating agencies and other researchers, and formatted the data into a common database for the purpose of facilitating access to data related to the conservation of Quaking Aspen in California. This information portal falls within the ADP goals to help agencies and land managers identify, map, treat, and monitor aspen habitats. This dataset is a portion of a master database compiled during a year long effort in 2005 to pull together current GIS layers and maps depicting Aspen communities in California.</SPAN></P></DIV></DIV></DIV>

本数据集收录了加利福尼亚州锡斯基尤县克拉马斯国家森林内已知颤杨林分的点位坐标及配套林分评估数据。配套的克拉马斯国家森林第五区域现有植被颤杨林图层（KLAMATH_NF_KNF_VEG_POLY）源自陆地卫星（LANDSAT）TM影像、斯波特（SPOT）卫星影像、正射影像、航空照片及辅助图层（源数据：第五区域林地与资源数据库地理信息系统（GIS）及Oracle数据字典，1995年4月14日）。林分分类依据主要树种、优势树种、林木尺寸及树木密度等指标，分类标准采用CALVEG系统与加州野生动物栖息地关联系统（California Wildlife Habitat Relationships System）。本点图层配套有多边形图层KLAMATH_NF_KNF_VEG_POLY，该图层包含了结合颤杨林分评估信息勾绘的林分范围。数据编制：颤杨林勾绘项目（Aspen Delineation Project, ADP）由美国林务局太平洋西南区域、加州鱼类与猎物部资源评估项目以及美国土地管理局加州办事处联合开展。该项目首席研究员为David Burton；如需了解ADP的更多详情，请访问：www.aspensite.org。加州鱼类与猎物部资源评估项目从合作机构及其他研究者处整合了上述信息，并将数据整理为统一数据库，以方便获取与加州颤杨（Quaking Aspen）保护相关的数据。本信息门户契合ADP的项目目标，旨在协助各机构与土地管理者识别、绘图、治理及监测颤杨栖息地。本数据集为2005年为期一年的综合编制工作所生成的主数据库的一部分，该工作旨在整合当前用于展示加州颤杨群落的GIS图层与地图。