$1-$Name three projection surfaces that are used in map projections.

R$-$

$2\_$Name the two basic projections used in state plane coordinate systems.

What are their fundamental differences?

Which one is preferred for states whose long dimensions are north$-$south?

Which one is preferred for states whose long dimensions are north$-$southEast$-$west?

R$-$

$3-$What does it mean to be a conformal projection?

R$-$

$4-$Define the following:

The Geoid

The Ellipsoid

Standard Parallel

R

$5-$List two of the most common vertical datum used in the USA.