Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/15

Click to flip

15 Cards in this Set

  • Front
  • Back
Interval Linear Symbols
Time (isochrones)
Elevation (isobase or contours)
Temperature (isotherms)
Ratio Linear Symbols
Flow Maps
Direction
Amount
LINEAR DATA
INFORMATION ON LOCATION
PLUS INFORMATION ON
Attribute (the topic or theme)
Amount (size or rank or pathway)
Direction (sometimes generalized)
Quantitative Flow Maps
QUANTITATIVE lines usually scaled so that widths are proportional to the amounts they represent (cost, tons, people, etc)
Traffic Flow Maps
Population Flow Maps
Commodity Flow Maps
Desire Line Maps
Flow Map Pro/Con
POSITIVE
VERY EFFECTIVE FOR LINEAR DATA INVOLVING MOVEMENT OF SOMETHING
NEGATIVE
DIFFICULT TO CONSTRUCT
DIFFICULT FOR READERS TO ESTIMATE SIZE
Flow Map Guidelines
Flow lines are most important
Smaller lines on top of larger lines
Arrows necessary if direction is critical
Land and Water contrast is essential
Projection, center and aspect important
Keep information simple
Legend should be clear and unambiguous
Dot Density Alternative Name
Also called Aerial-Frequency Mapping
Data Types
Discrete geographic phenomena
Raw data (count data)
Qualitative or Quantitative Map
One dot equals one item
ONE DOT EQUALS ONE ITEM
Qualitative
Nominal Scale
Location accurate
One dot equals many items
ONE DOT EQUALS MORE THAN ONE
Quantitative
Ordinal scale (apparent densities)
Location generalized (spatial proxy)
Dot Density Pro/Con
Positive
good visual impression
easy to construct
Information inside of enumeration units
Negative
limited information
not intended for determining exact quantities
Dot Value Guidelines
Should be a rounded number, no fractions
Minimum 2-3 dots per unit
Should be tested with different sized dots using the unit with the highest density – dots should just start to merge.
Enumeration Units
Enumeration Units
Smaller the unit the greater the accuracy

Dot Density map
Dot Location Guidelines
(1) Transition: dots should transition from high density to low density across units
(2) Boundary Effect: dots should be located near and on boundaries
(3) Ancillary variables
a. Limiting variables (ponds, parks etc)
b. Related variables (roads, soils etc)
Dot distribution methods
Uniform
Geographically Weighted
Geographically Based