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Old Posted Jan 15, 2021, 6:21 AM
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WhipperSnapper WhipperSnapper is offline
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Join Date: Sep 2002
Location: Toronto+
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It's aerial photography from planes and drones put through GIS mapping software. ESRI is, by far, the largest provider.

Measuring from google earth or other GIS providers will give you a truer height of a structure from a specific point than most official sources. It has become extremely accurate. Lattice shouldn't be any issue.
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