Test 1 Flashcards
(39 cards)
Maps have:
key, scale, purpose, symbology
Jon Kimerling
any geographical image of the environment
Arthur Robinson
made Robinson projection, a drawn representation of geographic space
2 basic types of images
physical-air photos (minimal distortion)
cognitive-our minds pic of important “real stuff”
cartographic maps
stable, correctly images when compared to cognitive maps (ex: globes, physical models)
the process of understanding
reading, analysis, interpretation
recent:
experience has found that teaching map making didnt effectively train map users to use and read maps
map making vs map use
1960s: transformation view-map readers cannot understand map if its not simple
cognitive view-popular in later 70s, “teach map reading, dont simplify maps”
today: everyone uses maps, easily accessible
cognitive maps
minds eye view of the world
qualitative vs quantitative
qual-perceptions, names, nonnumeric characteristics
quan-perceptions or facts based on numeric measurements
cartogram
puts data before geography-intentional skewing of physical space (huge texas) (1 inch to 5 hours)
to build a map we need:
region, time, variables, scale
mappings catch 22 (3 components play against one another in geospatial representation
scale, regional coverage and product size
1 mi=? ft
5280 ft
types of scale
verbal-1 in=5 mi
graphic-drawing map unit on map and do not state it (scale bars, least accurate)
RF-1:24,000 (1 map unit is 24,000 of real world units)
measurement levels (NOIR)
nominal-names only (soils, land cover, voter registration)
ordinal-has an order, no number associated (freshman, sophmore, etc.)
interval-use numbers and amount of difference between numbers (no 0 thats meaningful) C and F
Ratio-numeric scale likes interview (0 means none) Rain, speed
central perspective
1 eye vision, pic taken with single lens (most accurate point is directly under lens, least accurate at edges)
stereographic
2 eye vision, combines info to see depth (3D vision)
parallel
infinite number of eyes, not physically possible (MOST maps are formatted in parallel perspective-doesnt distort)
vantage point
used in 2D maps that appear to be 3D
azimuth
gives direction of viewer from center of map in standard directional units (true north-0 or 360 deg)
visual (altitude)
angle above horizon (plane) on which drawing is based (height above ground as an angle)
kinds of visual altitude
vertical
horizontal
oblique (in between vertical and horizontal)
projection always involves
distortion