Chart Projection Flashcards
What is the convergency factor on a Direct Mercator projection?
Zero.
On a Lambert conformal conic chart, the distance between parallels of latitude spaced the same number of degrees apart:
is smaller/bigger between the standard parallels than outside them
Smaller
The convergence factor on a Mercator chart is:
Zero
On a Lambert conformal conic chart, with two standard parallels, the quoted scale is correct along the
Two standard parallels
On a mercater chart, what is a straight line and what is curved?
GCT curved - RLT straight
scale (latitude) = what using the mercator chart?
Scale at the equator x COS latitude
What is true at the parallel of origin on a lamberts conformal chart?
Scale is correct.
How do calculate the convergence factor on a lamberts conformal chart?
Sine (parallel of origin)
What are the two equations for chart convergency on a lamberts conformal chart?
Chlong x convergence factor
Or
Chlong x sin(point of origin)
On a direct mercator chart, explain the ABBA formula ( chiquetitta tell me whats wrong x)
Scale (lattitude) x cos
How does scale change on a polar stereographic chart?
Secant squared x half the complimentary lattitude
On a direct mercator chart, where is the chart convergency correct compared to the earth convergency?
At the equator.
How does the chart convergency change with latitude in a Lambert Conformal projection?
Constant
Which of the following statements most accurately describes a great circle route on a Lambert conformal conic chart? A straight line will approximate to a great circle course if the straight line is close to the what?
Parallel of latitude.
On a Polar Stereographic projection the chart convergency between two positions depends on the:
difference in blank of the two positions.
difference in longitude of the two positions.
