Fire insurance maps
|文件类型：||互联网资源, 地图, 计算机文档|
|所有的著者/提供者：||Sanborn Map Company.; ProQuest Information and Learning Company.; Environmental Data Resources, Inc.|
|描述：||Electronic resource : maps|
|制图数学数据：||Scale [1:600]. Drawn at a scale of 50 feet to an inch.|
|详述：||Mode of access: World Wide Web.|
|其他题名：||Sanborn maps 1867-1970|
Includes textual information on construction details (for example, steel beams or reinforced walls), building use (ranging from symbols for generic terms such as stable, garage, and warehouse to names of owners of factories and details on what was manufactured in them ; in the case of large factories or commercial buildings, even individual rooms and the uses to which they were put are recorded on the maps), and other building features (such as pipelines, railroads, wells, dumps, and heavy machinery).