3 most common developable surfaces?
con, planar, cylinder, pyramid
universal transverse mercator
what is a geoid?
a hypothetical shape of the earth
public land survey system
(a chunk of the earth that has been surveyed)
world geodetic system
what is a WGS?
a standard spheroid reference surface for raw altitude and has nominal sea level
North America Datum
relating to the number sixty
Global Positioning System
global navigational satellite system
dilatation of precision
How many satellites for a 3D fix?
a min of 3 but 4 is best
State Plane Coordinate
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
the shortest path on a curved area
points, lines, polygons
triangular irregular network