Quiz 1 Flashcards
(35 cards)
Thematic map
displays the spatial pattern of a theme or attribute
General Reference maps
emphasize the geography location (topoographic maps, elevation, location of water)
17th century maps
show trade winds and monsoons
19th century maps
lists, organized, geography of force, titles
20th century maps (what did Europe focus on)
terrain representation
label placement
map symbolization
cartographic design
Communication perspective emphasis on
map user
choice of symbol
design choice
what are the scales of measurements
nominal
ordinal
interval
ratio
Nominal data
categories
no quantitative operators
kinds of things (race or ethnicity)
Orinal data
baed on different disciplinary news
categories can be ordered then organized
Interval Data
linked to quantitative
has an arbitrary zero
Ratio
distances and area (0 is not arbitrary)
inferential statistics
choropleth maps
what are the common methods of data classification
Equal interval
quantiles
mean-standard deviation
maximum breaks
natural breaks
Equal interval
each class occupies an equal interval along the number line
uniform distribution
straight forward
fails to consider how data are distributed along the number line
Quantiles
rank-ordered and equal numbers of observations are placed in each class
same number of observations in each class
solves problem of empty classes
hard to tell quantile from legend
mean-standard deviation
data are distributed along a number line
classes are formed by repeatedly adding or subtracting the std from the mean
Maximum breaks
ordered raw data from low to high
differences between adjacent values are computed and the largest of these differences serve as class breaks
natural breaks
more common
want to minimize the distance between data values in the same class and maximize differences between classes
Benefits of color
- Improve an interesting display
- Subtitle discriminations in complex displays
- Draw attention to warnings
- Color coding can emphasize the logical organization of information
- Makes designs more visually interesting and aesthetically appealing
Analogous
adjacent colors on the wheel (opposite on wheel)
complementary
opposing colors (opposite on wheel)
Saturation
amount of gray in a hue
as saturation increases, the amount of gray decreases
Brightness
perceived amount of light coming from a source
amount of white in a hue
as brightness increases, the amount of white increases
Luminance
measured amount of light coming from some region of space
can be physically measured
Color is irrelevant to
perceiving object shape
perceiving object layout in space
objects are moving