Rock River Ontario. 1:50,000. Map Sheet 042G06, ed. 3, 1987

This is a georeferenced raster image of a printed paper map of the Rock River, Ontario region (Sheet No. 042G06), published in 1987. It is the third 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 1987 and the information on the map is current as of 1986. 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.本数据集为安大略省洛克河（Rock River）区域印刷纸质地图（图幅编号：042G06）的地理配准栅格图像，该地图于1987年正式发布。本图为该系列地图的第三版，涵盖地形起伏、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、溪流与急流在内的水系、桥梁、建筑、磨坊、输电线、地表形态与地貌构造等自然与人工要素。该地图虽于1987年发布，但所载信息的现势性截止至1986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合作编制完成。请注意：图像采集与外业测量的时间跨度可达数年，部分细节的更新时间可能晚于其他要素。如需获取详细的编制信息，请查阅单幅图幅左下角的标注内容。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，地图的地理配准工作由多伦多大学图书馆与Eastview Corporation提供技术支持。