Mahamo Lake Ontario. 1:50,000. Map Sheet 042L13, ed. 1, 1977

This is a georeferenced raster image of a printed paper map of the Mahamo Lake, Ontario region (Sheet No. 042L13), published in 1977. 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 1977 and the information on the map is current as of 1972. 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1977年发布的安大略省马哈莫湖（Mahamo Lake）区域印刷纸质地图（图幅编号：042L13）的地理参考栅格影像（georeferenced raster image）。该地图为系列地图的首版，全面涵盖区域内自然与人文地理要素，包括地形起伏、高程点、行政边界、次要道路与支路、铁路、步道、林区、包含湖泊、河流、溪流及急流的水道，以及桥梁、建筑物、磨坊、输电线路、地表形态与地质构造等内容。
本地图于1977年正式发布，但其所载地理信息的现势性截止至1972年。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。
请注意：影像采集与外业测量的周期可能跨越数年，部分地理要素的更新时间晚于其他要素。如需获取详细的编制信息，请查阅单幅地图左下角的标注内容。
原始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（georeferencing）工作由多伦多大学图书馆与伊斯特维公司（Eastview Corporation）提供支持。