1945. VMap1 is a vector digital topographic reference product developed by Natural Resources Canada (NRCan) and The Department of National Defence (DND).... Canada Centre for Mapping and Earth Observation.
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1945. VMap1 is a vector digital topographic reference product developed by Natural Resources Canada (NRCan) and The Department of National Defence (DND).... Canada Centre for Mapping and Earth Observation.
1973. Flint, Harold J. Scale approximately 1:510,000. "This map is a revision of the 1968 publication ..." Includes directory of oil pipe line companies and index to gas ... Ohio. Department of Natural Resources.
1975. Scale approximately 1:2,000,000. "Map available also at a scale of 1 inch = approximately 8 miles." Shows gas and liquid petroleum storage areas, p... Ohio. Division of Geological Survey.