The variable most affecting how many pixels along an epipolar line need to be searched for an image match is

$($a$)$ how well the integers representing color match

$($b$)$ ground elevation difference

$($c$)$ flying height change in overlapping exposures

$($d$)\%$ overlap

Typical feature code that requires scaling of a block or cell are

$($a$)$ sidewalk

$($b$)$ driveway

$($c$)$ centerline

$($d$)$ flagpole

The offset from GPS phase center to nodal point of the camera lens in GPS$-$IMU processing is

$($a$)$ one dimensional

$($b$)$ two dimensional

$($c$)$ three dimensional

$($d$)$ not a necessary measured quantity due to camera calibration

A profile derived from a DTM changes grade

$($a$)$ at every crossing of a triangle

$($b$)$ at every intersection with a measured point

$($c$)$ in parabolic fashion as profiles are always along vertical curves

$($d$)$ never a profile is a constant grade

How many pass points usually exist in a photo in the middle of a flight line in the most modern form of aerotriangulation?

$($a$)3$

$($b$)6$

$($c$)9$

$($d$)$ more than $9$

What is an advantage of a fixed wing drone vs$.$ a rotor $($helicopter$)$ type drone?

$($a$)$ can land in more confined areas

$($b$)$ uses metric aerial cameras similar to that in conventinal photogrammetry

$($c$)$ battery life

$($d$)$ all of the above

What three items are generally used to create effective line symbology based on feature coding?

$($a$)$ orthophoto corrections, mosaicing, gray tone matching

$($b$)$ layer$/$level$,$ line type, line color

$($c$)$ linear units $($ft$.$ vs$.$ m$.),$ datum, plane projection

$($d$)$ line color, description, point symbol