Chapter 2 Flashcards
2D representation of earth and the spatial distribution of selected phenomena
map
to show the distribution of one or more phenomena
thematic maps
relationship between length measured on map to the corresponding distance on ground
map scale
uses a line marked off in graduated distances
graphic (bar) scale
a proportion between map distance and ground distance
fractional scale (representative fraction)
states in words the ratio of map scale length to the distance on the ground
verbal (written) scale
portrays small portion of earths surface with considerable detail
large scale map
1:10,000 compared to 1:100,000
large scale map
portrays larger portion of earths surface with limited detail
small scale map
1:100,000 compared to 1:10,000
small scale map
system in which the spherical surface of earth is transformed for display on a flat surface
map projection
accurate with regard to size, but shapes are badly distorted
equivalent projection
depicts accurate shape, but the sizes are severely exaggerated
conformal projection
created by mathematically “wrapping” a globe in a cylinder
cylindrical projection
created by projecting the markings of a center lit globe on a flat piece of paper
planar projections
created by projecting the markings of a center lit globe onto a cone wrapped tangent to, or intersecting, a portion of the globe
conic projections
generally designed to show the entire globe
pseudocylindrical projections aka elliptical or oval projections
title date legend scale direction location data source projection type
map essentials
generic term referring to any line that joins point of equal value
isoline
what does GPS stand for
the global positioning system
global navigation satellite system for determining accurate positions on or near earths surface
GPS
any measurement or acquisition of information by a recording device which is not in physical contact with the object under study
remote sensing
what does GIS stand for
geographic information systems
computer systems designed to analyze and display spatial data
GIS