Lamberts chart, Polar steriographic chart (31-05-18) Flashcards
What is the relationship between the angle of cone and the parallel of tangency of a lamberts chart?
it is a sin relationship
When is chart convergency equal to earth convergency on a lemberts chart?
At the point of tangency
How is the chart coverage of a lamberts chart extended?
The scale at the point of tangency is mathematically reduced, creating two points where scale is correct called standard parallels.
The new reduced point of tangency is called the point of origin
What are the 2 rules for keeping a lamberts chart within 1% of accuracy?
the 1/6 rule
in between standard parallels is 4/6 of the chart, therefore either side of the standard parallels is 1/6 of the chart.
16degree rule
the maximum difference in latitude between the standard parallels is 16deg.
What is the max chart coverage of a lamberts chart?
24deg chlat
When is a G.C on a lamberts chart straightest?
When closest to the PoO
How will G.C curve in relation to the PoO on a lamberts chart?
They will always curve concave to the PoO
How will R.L curve on a lamberts chart?
They will always be concave to the closest pole.
How are G.C represented on a lamberts chart?
Straight lines
What is the chart convergency on a lamberts chart?
cc = Chlong x sin(PoO)
What is sin(PoO) otherwise known as?
n
chart convergence factor (C.C.F)
Constant of Cone
When plotting on a lamberts chart, what track would you use?
the track at the midpoint of the G.C (R.L track)
What is the fisherman’s hook?
The arrow above a NAVAID that allows you to plot directly in mag on a chart.
What kind of projection does a polar stereographic chart use?
azimuthal/plane projection
What is the PoT of a polar stereographic chart?
A pole
