Geography Reference
In-Depth Information
Technique B
A nearby lake or pond:
Technique A
Technique B
A city block or town extent:
Technique A
Technique B
5. Are there any differences between technique A and B? How do you
explain them? Which technique do you think is preferable? Make sure to
consider the different sizes and shapes of features you measured.
Find an areal feature (at least 2
×
2 inches) on your 1:24,000 scale topographic map
and measure it using techniques A and B. Make sure you can find it on your
1:250,000 scale map:
Feature name and type
Area using:
Technique A
Technique B
Find the same feature on your 1:24,000 scale map and measure its area
using techniques A and B:
Area using:
Technique A
Technique B
6. Is the feature larger or smaller on the 1:250,000 scale map? What gener-
alization effects do you find? Explain the differences you detect with spe-
cific examples (e.g., the road defining the park's northern border is
greatly simplified in the 1:250,000 scale map). Make a drawing if it
helps.
Point
Line
Area
Aggregation
X
X
X
Displacement
X
X
X
Enhancement
X
X
Selection
X
X
X
Simplification
X
X
Smoothing
X
X
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