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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1999. "Bedrock" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Bedrock...
1997. "Fault" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Fault" is...
1999. "Structure" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Struc...
2007. This feature class contains wastewater structures corresponding information that falls within the boundary of Loudoun County.