North American Landscape Characterization (NALC), 1970s

1970s North American Landscape Characterization (NALC), part of the Mid-Atlantic Integrated Assessment (MAIA). The resolution of this dataset is 120m x 120m. The primary source of data for this project was Landsat MSS data acquired primarily in 1970's. Most of the data sets were acquired in 1973, but a few scenes from 1974, 1975 and 1976 were also used. More infomation can be found in the enclosed documentation. This dataset is the basis for the "change_70_90" dataset that documents change from the 1970s to the 1990s. Only limited metadata exists for this dataset; the UVM Spatial Analysis Lab has attempted to construct full metadata. 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1970年代北美景观特征数据集（North American Landscape Characterization, NALC），隶属于大西洋中部综合评估项目（Mid-Atlantic Integrated Assessment, MAIA）。其空间分辨率为120米×120米。本项目的核心数据源为1970年代获取的Landsat MSS数据，其中绝大多数影像采集于1973年，另有少量1974、1975及1976年的影像被纳入使用。更多详细信息可参阅随附的文档资料。本数据集是"change_70_90"数据集的构建基础，该数据集用于记录1970年代至1990年代的地表变化情况。本数据集仅留存有限的元数据，佛蒙特大学空间分析实验室（UVM Spatial Analysis Lab）已尝试为其构建完整元数据。本数据集同样属于指向巴尔的摩生态系统研究（Baltimore Ecosystem Study）的地理数据库（geodatabase）的221条元数据记录集合之一。该地理数据库可在线获取，体量较大。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吉字节，包含160个文件夹内的4914个文件。尽管本条元数据及其他同类元数据的属性字段并不丰富，但鉴于其所代表的数据具备实际应用价值，故仍予以公开。本数据集同样属于指向巴尔的摩生态系统研究的地理数据库的221条元数据记录集合之一。该地理数据库可在线获取，体量较大。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吉字节，包含160个文件夹内的4914个文件。尽管本条元数据及其他同类元数据的属性字段并不丰富，但鉴于其所代表的数据具备实际应用价值，故仍予以公开。