Orr Lake (West) Ontario. 1:50,000. Map Sheet 031D12, ed. 1, 1950

This is a georeferenced raster image of a printed paper map of the Orr Lake, Ontario region (Sheet No. 031D12), published in 1950. It is the first edition in a series of maps, which show both natural and man-made features such as relief, spot heights, administrative boundaries, secondary and side roads, railways, trails, wooded areas, waterways including lakes, rivers, streams and rapids, bridges, buildings, mills, power lines, terrain, and land formations. This map was published in 1950. Maps were produced by Natural Resources Canada (NRCan) and it's preceding agencies, in partnership with other government agencies. Please note: image / survey capture dates can span several years, and some details may have been updated later than others. Please consult individual map sheets for detailed production information, which can be found in the bottom left hand corner. Original maps were digitally scanned by McGill Libraries in partnership with Canadiana.org, and georeferencing for the maps was provided by the University of Toronto Libraries and Eastview Corporation.

本数据集为1950年发布的安大略省奥尔湖（Orr Lake）区域印刷纸质地图（图幅编号：031D12）的地理配准栅格图像（georeferenced raster image）。该地图为系列地图的首版，涵盖自然与人工地物要素，具体包括地貌、高程点、行政界线、次要道路与支路、铁路、步道、林区、包含湖泊、河流、溪流及急滩在内的水系、桥梁、建筑物、磨坊、输电线路、地形及地表构造。该地图于1950年正式发布。本系列地图由加拿大自然资源部（Natural Resources Canada, NRCan）及其前身机构联合其他政府部门共同编制出版。请注意：图像采集与外业测量的周期可能长达数年，部分要素的更新时间可能晚于其他要素。如需获取详细的制作信息，请查阅单幅图幅左下角标注的内容。原版地图由麦吉尔大学图书馆与Canadiana.org合作完成数字化扫描，地图的地理配准工作由多伦多大学图书馆与Eastview Corporation共同完成。