45
Key Terms
Key Terms
datum (p. 30)
ellipsoid (p. 30)
geoid (p. 30)
geodesy (p. 30)
NAD27 (p. 31)
NAD83 (p. 31)
WGS84 (p. 31)
datum transformation (p. 31)
geographic coordinate system
(GCS) (p. 31)
latitude (p. 31)
Equator (p. 31)
longitude (p. 32)
Prime Meridian (p. 32)
International Date Line (p. 32)
degrees, minutes, and seconds
(DMS) (p. 32)
decimal degrees (DD) (p. 33)
great circle distance (p. 33)
time zones (p. 33)
map projection (p. 36)
Universal Transverse Mercator
(UTM) (p. 39)
UTM zone (p. 39)
easting (p. 40)
northing (p. 40)
false northing (p. 40)
false easting (p. 41)
SPCS (p. 41)
SPCS zone (p. 42)
Chapter Wrapup
This chapter provided a look at what goes into setting up coordinates and references for data used with geospatial technology. Whether you’re reading coordinates from a GPS receiver or making measurements from a map, knowing
how that geospatial information is put together and referenced has an impact
on how you’re able to make use of that data, especially if you’re trying to fit
several types of geospatial data together.
In the next chapter, we’re going to switch gears and look at how you can
take your data (whether it’s a remotely sensed image, some information created using GIS, or a paper map of the local fairgrounds) and get it to match up
with all of the other geospatial data you have. Before that, this chapter’s lab
(see Geospatial Lab Application 2.1: Coordinates and Position Measurements on
page 46) will have you start applying the coordinate and measurement concepts described in this chapter with some more work with Google Earth.
Important note: The references for this chapter are part of the online companion for this book and can be found at http://www.whfreeman.com/
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