maps Flashcards
no distortion
globe
polar regions extremely distorted
Mercator- straight lines
useful for topographic maps
polyconic
longitude lines converge
shoe roads and political boundaries
highway maps
show elevation
topographic maps
show rocks that are exposed at the surface of the earth
geologic maps
show very specific things
specialized maps
grid system to locate places on the earths surface
the earth is divided into degrees
latitude and longitude
1 degree can be divided into how many mins
60
1 min can be divided into how many secs
60
parallel to the equator
distance in degrees north or south of the equator
latitude lines
equator
0 degrees
North Pole
90° N
South Pole
90° S
70 miles
1° of latitude
1 min is 1.15 miles
nautical mile
meridians prime meridians 0 degrees is arbitrarily picked at Greenwich, England connect pole to pole lines coverage at the poles not parallel, converge at poles perpendicular to the equator
longitude lines
1:24000
numerical scale
bar scale
graphical scale
conversion
verbal scale
1:1000000
show us area at low detail
zoomed out
small scale maps
1:24000
show a small area in lots of detail
zoomed in
large scale maps
used to interpret symbols
map legend
used on small scale to show more detail- large scale maps
inset maps