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Chapter 2
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Gravity
Terms in this set (24)
geographic information systems
> computer systems designed to analyze and display spatial data.
> allows data management using the link between data and a map.
isoline
any line that joins points of equal value of something.
contour lines
a line joining points of equal elevation
large scale
map scale that has a relatively large representative fraction (small denominator).
small scale
map scale that has a relatively small representative fraction (large denominator).
title
(MAP ESSENTIAL):
brief summary of the map's content or purpose
date
(MAP ESSENTIAL):
indicate time span of when data was collected
legend
(MAP ESSENTIAL):
symbols, colors, shadings, etc.
direction
(MAP ESSENTIAL):
grids of parallels or meridians or a north arrow
location
(MAP ESSENTIAL):
x-y- coordinate scale or more than one coordinate system
projection type
(MAP ESENTIAL):
helps the user assess the kinds of distraction on the map.
compromise projections
balances reasonably accurate shapes with reasonable accurate areas
cylindrical projections
mathematically "wrapping" the globe with a cylinder of paper in such a way that the paper touches the globe only at the globe's equator.
Mercator projection
a conformal map projection designed to facilitate oceanic navigation
planar projection
projecting a globe onto a flat piece of paper that is tangent to the globe at one point
conic projection
projecting the markings onto a "line"
pseudocylindrical projection
a roughly football-shaped map.
color infrared
____ film has proven very valuable for interpretation of Earth resources from airborne cameras.
contour
A(n)____ map contains lines joining points of equal elevation
color infrared
In ____ film photography, the photographic film is sensitive to wavelengths longer than visible light.
landstat
the most important Earth resources satellite series that was started in the 1970s
scale
A(n) ____ measures map distance to Earth distance
photogrammetry
the science of obtaining reliable measurements from photographs
equivalence
the characteristic of projections which portray accurate sizes but distort the shapes of land masses.
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