Geo 160 Exam 1 Flashcards
(52 cards)
Datum
Measurements, Records
Information
Records that have meaning to you
Knwoledge
Information you are ready to act upon
variables
data relevant to a particular problem (Car color)
Values
Silver
what is geographic data
data that contaisn coordinates
what is an attribute
a geographic variable
name 2 things all coordinate systems require
origin and oreintation
projection
a systematic transformation from a round surface to flat surface
developable surfaces
surfaces that can be turned into a plane
name 2 developable surfaces
cone and cylinder
what do equal area maps preserve
surface area of depicted objects across entire map
what do conformal maps preserve
the shapes of small features, but not across the entire map
what do equidistant maps preserve?
scale along specific lines, but not entire map
what do azimuthal projections preserve
directions from one selcted point to all other points on map
Reference maps
Have no single stpry about them - multiple purposes
reference map examples
google maps, topo maps
thematiuc maps
tell a storey about spatial phenomenom
5 steps of the cartographic process
Data selection Spatial simplification Smoothing, aggregation, typification (e.g. cartograms) Spatial exaggeration Data classification Data symbolization
data symbolization
color, hue, etc
name 3 common data classification processes
equal interval, quantile, manual
feature
the where of a spatial object
attribute
the what of a spatial object
the three msot typical ways to talk about the “where?”
through points, lines, and polygons
