On a contour map, hatched lines show areas of depression.
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...
This post is part of a series on topography and site mapping:
- Two-Peg Test: How to Determine the Accuracy of Your Leveling Instruments
- Surveying Basics: Reading a Contour Map
- Methods to Make a Contour Map
- Selecting a Site for an Onsite Treatment System
