lecture 5 map design. cartography cartography is the art, science and technology of making maps...
TRANSCRIPT
Lecture 5
Map design
Cartography
Cartography is the art, science and technology of making maps together with their study as scientific documents and works of art - British Cartographic Society
The conception, the designing and the execution of the map – Robinson
Map process
Reality Cartographer Map (replace reality with symbols) Map reader
What is a map? Real things
Real things reduced to points, lines, or polygons
Drawn with symbols in different colors
Types of Map Reference
Location and position of features Roads State capitols Time zones
Thematic Single theme, topic, attribute
Population density Temperature variation Pickups per capita
Reference maps show locations
Thematic map show attributes
Colors and labels: Reference or Thematic?
Class or groups based on attribute value
Number of classes Eye sees up to 8
variations of one color Be careful
Classification methods
Equal Interval Equal range, 100-200, 200-300, 300-400 Some groups may not have objects in them
Natural groups Objects with similar values, make a group
Quantile Equal number of objects per group 5 groups, 50 states, 10 states per group
Manual
Break points Define highest number in class Which classification method?
Quantile Add break points Total number divided by number
of classes 58 California counties 5 classes 58/5 = 11 counties per class
Dot maps show density
Graduated symbols, bigger, more
Chart maps, piece size, reflects value
Pie size can be proportional
Thematic Map exercise
Parts of a mapNeat line
Legend
Scale Credits
North arrowInset
Ground
Figure
Title
Balance of map parts
Title Here
Title of my map Here
Which is balanced?
Hierarchy – Front to Back Map topic should be forward
Which is forward? Land? Water?
No neatline
Many neatlines
Scale1:1
1:10
LargeScale
SmallScale
1:2
Large and small scale maps1:3000 1:100,000
1:150,000,000 1:300,000,000
LargeScale
SmallScale
Scale and Generalization Raster and digitized outline, very detailed
Scale and Generalization Outline is very detailed with each pier
Scale and Generalization Yellow generalization for smaller scale maps
Scale and Generalization As you zoom out (smaller scale) all that detail
isn’t needed and actually takes longer to draw
Date map created or data collected?
Graticule
What do these colors mean?
Red Blue Green Brown Yellow
Color adds meaning
Beware of software’s default colors
Colors on a map Eye sees only 12 colors at
a time Be careful
Number of classes Eye sees up to 8
variations of one color Be careful
Fonts, bold, wording, and size
Distribution of Employment by State 1996 USA: Employment Distribution
1996
U.S. Employment America at Work Where the Jobs are Today
Labeling the legend Label should not be “Legend” What do the numbers mean
Bad map
Better map
What’s wrong with this map?