Maps and Charts Flashcards
How is the scale represented on a map?
Representative Fraction
Ratio
Statement of Words
How is scaled worked out?
Chart Distance/Earth Distance
If the scale denominator is larger, is the map small scale or large scale?
Small Scale. Less Detail will be shown.
If more detail is shown, is it a small scale or large scale?
Large Scale
What must a chart have to be conformal?
All angles and bearings accurately represented.
Scale distortion must be the same in all directions
Each parallel must cross every meridian at right angles
What are classic conformal azimuthal projections used to produce?
Topographical and specialist aeronautical charts for polar regions
Large area meteorological forecast charts
Which projection is the only conformal cylindrical projection?
Mercator
What type of projection is Mercator?
Conformal Cylindrical Projection
On a Mercator, how do Rhumb Lines and Great Circles appear?
Rhumb Lines appear as straight lines
Great Circles are projected as shallow curves, concave to the equator.
Does the scale expand from the equator on a Mercator?
Yes
What is Lamberts conformal conic used for?
Plotting radio bearings
Long Distance Flights using great circle tracks
What are the properties of a Mercator map?
Rhumb Lines appear as straight lines
Great Circles are projected as shallow curves, concave to the equator.
Angles and bearings are accurately represented.
Scale distortion is the same in all directions
Each parallel crosses every meridian at right angles
On a Lamberts Conformal Conic, how do Rhumb Lines and great circles appear?
Great Circles appear as straight lines.
Rhumb Lines are projected as concave to the nearest Pole.
What are the properties of a Lamberts Conformal Conic map?
Great Circles appear as straight lines.
Rhumb Lines are projected as concave to the nearest Pole.
