##### Fundamentals

3 most common developable surfaces?

con, planar, cylinder, pyramid

UTM

universal transverse mercator

what is a geoid?

a hypothetical shape of the earth

PLSS

public land survey system

(a chunk of the earth that has been surveyed)

WGS

world geodetic system

what is a WGS?

a standard spheroid reference surface for raw altitude and has nominal sea level

NAD

North America Datum

sexagesimal

relating to the number sixty

GPS

Global Positioning System

GNSS

global navigational satellite system

DOP

dilatation of precision

How many satellites for a 3D fix?

a min of 3 but 4 is best

SPC

State Plane Coordinate

False Origin

selecting a point on the map where measurements will be based from the original origin of the map (used in UTM and state plane)

why case an oblique conic projection?

to minimize distortion of going from East to West

Three different North's?

True North = 0'degrees

Grid North = 0.6' degrees

Magnetic North = 13.5'degrees

Geodestic

the shortest path on a curved area

Raster

pixels

vector

points, lines, polygons

TIN

triangular irregular network