Q1
Georeferencing
Answer: 101- associating a map or image with spatial location
Q2
control points
Answer: 101- points come in pairs that match the spatial location with a point on an
unreferenced image or map
Q3
Spatial Reference Systems (SRS)
Answer: 101- coordinate based local, regional, or global system used to location
geographical entities (aka Coordinate Reference System (CRS))
Q4
Coordinate Reference System (CRS)
Answer: 101- coordinate based local, regional, or global system used to location
geographical entities (aka Spatial Reference Systems (SRS))
Q5
International Terrestrial Reference System (ITRS)
Answer: 101- a three-dimensional coordinate system with a well-defined origin (the
center of mass of the Earth) and three orthogonal coordinate axes (X,Y,Z)
Q6
Map projection
Answer: 101- transforming coordinated from a curved surface (Earth) to a flat map
, Q7
Horizontal datum
Answer: 101- model of the earth as a spheroid (2 components, reference ellipsoid and
a set of survey points both the shape of the spheroid and its position relative to the
earth)
Q8
Vertical Datum
Answer: 101- reference point for measuring elevations
Q9
NAVD88
Answer: 101- Gravity based geodetic datum in North America
Q10
WGS 84 (World Geodetic System)
Answer: 101- reference coordinate system used by the Global Positioning System
(GPS)
Q11
SRID integer
Answer: 101- Spatial reference system id numbers, including EPSG codes defined by
the International Association of Oil and Gas Producers
Q12
Mercator Projection- distortions
Answer: 101- preserves shape and direction, area gets distorted
Q13
Mercator Projection
Answer: 101- projecting the Earth onto a cylinder tangent to a meridian