WETMAAP Skill 2
Mono Lake - Element 2
Skill 2: Scale Determination
Element 2: Determining the Scale of the 1999 Aerial Photograph
Materials:
1:24,000 scale Lundy/Negit Island/Mount Dana/Lee
Vining
1999 Aerial Photograph of study site
9" x 9" clear film overlay
color pens
ruler
drafting tape
calculator
1.
Tape the 9" x 9" clear film overlay on top
of the 1999 aerial photograph.
2.
Use the black pen to make four marks on each fiducial.
Hint: The fiducial
is a yellow dot or cross-hair along each of the four sides of the aerial photograph.
3.
Using the1994 1:24,000 scale Lundy/Negit Island/Mount Dana/Lee
4.
Use the ruler and the black pen; link the four corners of the study
site to make a complete boundary.
5.
Identify two points at least four inches apart on the1994 1:24,000
scale
7. Measure
the distance between the two points on the the1994 1:24,000
What is the distance in inches?
8. Measure the distance between the two points on the 1999 aerial photograph with the ruler.
9. Using
the calculator and "Scale Determination" section of the Reference Manual,
determine the scale of the aerial photograph.
What is the scale that you calculated?