Building Footprints, Baltimore County

Baltimore County building footprints circa 1997. This dataset was obtained from the Baltimore County Goverment; there was only limited supporting documentation. A limited assesment was conducted that compared the building footprints to high resolution aerial imagery (Emerge) flown in 1999. This assessment found that a considerable number of building footprints were missing. Those that did exist appeared to agree spatially with the Emerge imagery. The following building types are included in this dataset: residential, commercial/industrial, other structures, miscellaneous buildings, buildings under construction, toll booth plazas, rail stations, water towers, storage tanks, silos. This is part of a collection of 221 Baltimore Ecosystem Study metadata records that point to a geodatabase. The geodatabase is available online and is considerably large. Upon request, and under certain arrangements, it can be shipped on media, such as a usb hard drive. The geodatabase is roughly 51.4 Gb in size, consisting of 4,914 files in 160 folders. Although this metadata record and the others like it are not rich with attributes, it is nonetheless made available because the data that it represents could be indeed useful. This is part of a collection of 221 Baltimore Ecosystem Study metadata records that point to a geodatabase. The geodatabase is available online and is considerably large. Upon request, and under certain arrangements, it can be shipped on media, such as a usb hard drive. The geodatabase is roughly 51.4 Gb in size, consisting of 4,914 files in 160 folders. Although this metadata record and the others like it are not rich with attributes, it is nonetheless made available because the data that it represents could be indeed useful.

本数据集为1997年左右的巴尔的摩县（Baltimore County）建筑轮廓（building footprints）。该数据集源自巴尔的摩县政府，配套支撑文档较为有限。
研究人员开展了一项有限评估，将该建筑轮廓与1999年拍摄的高分辨率航空影像（Emerge）进行比对。评估结果显示，大量建筑轮廓存在缺失；但现存的建筑轮廓在空间位置上与该航空影像吻合度较高。
本数据集涵盖以下建筑类型：住宅建筑、商业/工业建筑、其他构筑物、杂项建筑、在建建筑、收费站广场、轨道交通站点、水塔、储水罐以及筒仓。
本数据集属于指向某地理数据库（geodatabase）的221条巴尔的摩生态系统研究元数据记录之一。该地理数据库体量庞大，可通过线上渠道获取。经申请并达成特定协议后，可通过USB硬盘（usb hard drive）等介质寄送该数据集。该地理数据库总容量约为51.4 GB，包含160个文件夹下的4914个文件。尽管此类元数据记录的属性字段并不丰富，但鉴于其所代表的数据具备较高实用价值，仍将其对外公开。
本数据集属于指向某地理数据库（geodatabase）的221条巴尔的摩生态系统研究元数据记录之一。该地理数据库体量庞大，可通过线上渠道获取。经申请并达成特定协议后，可通过USB硬盘等介质寄送该数据集。该地理数据库总容量约为51.4 GB，包含160个文件夹下的4914个文件。尽管此类元数据记录的属性字段并不丰富，但鉴于其所代表的数据具备较高实用价值，仍将其对外公开。