Engineering Survey Controls
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A horizontal control monument is a brass plaque embedded into a concrete cylinder that sits flush with the ground. The City of Brampton supports the North American Datum of 1983 (NAD83) as its standard horizontal georeferencing system. A vertical control monument, also referred to as a “benchmark,” is a brass plaque that is often located on private property. Benchmarks throughout Brampton are referenced to the 1978 Southern Ontario Vertical Datum and provide elevations that are accurate to the second order.
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City of Brampton创建时间：
2016-09-22
