Fixed entitites, Can only take a specific value (Ex. number of students in a class, anything that is counted and not measured)
can assume all values between any two specific values. They are obtained by measuring.
map in which some thematic mapping variable is substituted for area (like a graph in a map)
The Land Ordinance
townships were six miles square, and were subdivided into 36 sections, each section consisting of one square mile. One section of each township was set aside to support public education, and the remaining sections were to be sold at public auctions.
maps that show the absolute location of places and geographic features determined by a frame of reference, typically latitude and longitude
a tabular file containing rows and columns; descriptive attributes about some object such as a geographic feature are contained in each row
classes based on natural groupings through examination of histogram
(good: minimizes differences
bad: data range uneven)
Are points taken at regular intervals from the cumulative distribution function (CDF) of a random variable.
A data classification method that divides a set of attribute values into groups that contain an equal range of values
The acquisition of data about Earth's surface from a satellite orbiting the planet or other long-distance methods.
Dot Density Map
Thematic map that uses dots to represent the frequency of a variable in a given area.