Online ExclusivesSurveying Basics: Reading a Contour Map

Surveying Basics: Reading a Contour Map

Topographic maps are useful for the siting and design of onsite systems

  • By Jim Anderson, Ph.D.
  • May 29, 2019

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Survey Mapping Onsite Septic System Onsite System Design

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Surveying Basics: Reading a Contour Map

A topographic map of the site of a proposed sewage treatment system can be very helpful to both the site evaluator and designer. Information can be obtained about land slope, drainage and depressions by looking at a topographic map.

A topographic map is a scale diagram with lines...

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