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- By the Mercury Mine Desert Dudes
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- To have the Desert Dudes create a digital map – using accurate mapping
techniques and computer GIS tools
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- Students can take home and work on their computer.
- Map can be posted on school’s web site.
- Great teaching tool for mapping and new computer technology.
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- So students can then use mapping software to make measurements of
various aspects of map.
- So the map will look right.
Things will appear were you expect and look right in proportion
to other things.
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- We don’t guess how to draw things in the computer map.
- We measure things in the Desert Area first, write down our measurements
and use those measurements to draw in the computer map.
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- Usually you measure from a known place.
- We decided to measure from the fences of the Desert Area. (How far were things from the fences.)
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- We obtained an aerial photo of the Desert Area showing the boundaries.
We could use the fences because they would correspond to the boundary on
the photo.
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- We could just trace the around the border of the Desert Area to get a
pretty accurate picture of the Desert Area border in the computer. The fences would then match that
border.
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- We thought about using long nylon tape measures.
- Too many trees and bushes
- Took too long and was too difficult for the Dudes.
- We needed another way to measure using the fence as a starting base.
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- The globe – longitude and latitude
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- United States Geological Survey (USGS) Geodetic Benchmarks:
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- Created with engraved nickel washers nailed into the ground every 30
feet
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- Don’t have to fight through as many trees and bushes.
- Many more points that are much closer to measure from.
- More accurate – we know exactly what points we are measuring from.
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- First we broke the Desert Area up into four sections.
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- Then the Dudes broke up into a team for each area and used the grid to
make measurements.
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