# Shared Flashcard Set

## Details

CartographyCH5
UNA Dr. Strong Cartography 325
28
Geography
Undergraduate 3
04/20/2010

## Cards Return to Set Details

Term
 Data evaluated
Definition
 in terms of statistics, size, and forms.
Term
 Data Classification
Definition
 measure for symplifying large data sets to assist in analysis and display
Term
 Decisions
Definition
 number of classes and data classification schemes to be used in data generalization.
Term
 Nine Classification Schemes
Definition
 1. Natural Breaks 2. Optimization 3. Nested Means 4. Mean and Standard Deviation 5. Equal Interval 6. Equal Frequency 7. Arithmetic 8. Geometric 9. User defined.
Term
 Ratio
Definition
 the number of one item compared to the number of another item.
Term
 Proportion
Definition
 the ratio of the number of items in one group(class) to the total of all items
Term
 Percentage
Definition
 an associated amount based on a fraction of 100: also a proportion multiplied by 100
Term
 Rate
Definition
 a ratio of the number of items to a standardized value, for example, general fertility rate
Term
 Descriptive Statistics
Definition
 sort, rank order, range, mean, median, standard deviation, normal distribution
Term
 sort
Definition
 reordering of the data into numberical sequence
Term
 rank order
Definition
 the sequencing of numbers arranged from high to low
Term
 range
Definition
 the difference between the largest and smallest data values in a data set
Term
 mean
Definition
 the average of a class or data set determined by the summation of the data values divided by the number of observations
Term
 median
Definition
 the middle value in a rank-ordered set of numbers
Term
 mode
Definition
 the most often occuring number or value in a data set
Term
 standard deviation
Definition
 a measure of dispersion of observations about the mean
Term
 normal distribution
Definition
 usually associated with larger data sets, the data are distributed symmetrically about the mean2
Term
 Three Steps in Data classification
Definition
 1. Selection of the number of classes 2. Classification procedure utilized 3. Analysis of Classification Accuracy
Term
 Natural Breaks
Definition
 division of a data set into classes based on breaks visible on a dispersion graph or histogram
Term
 Optimization
Definition
 a more sophisticated method of pursuing natural breaks from a quantitative, algorithmic standpoint.
Term
 Nested Means
Definition
 a classification which uses the mean of the data set to identify two classes
Term
 Mean and Standard Deviation
Definition
 class ranges are determined for a normally distributed data set using the mean and stadard deviation steps above and below the mean.
Term
 Equal Interval
Definition
 classification scheme where the range of each class is the same
Term
 Equal frequency
Definition
 classification scheme where each class has the same number of observations
Term
 Arithmetic
Definition
 schemes that are useful when classifying data with significant ranges
Term
 Geometric
Definition
 useful for the dramatic ranges in population
Term
 User Defined
Definition
 arbitrary determination of clas breaks specified by cartographer
Term
 Maps gain their value in 3 ways
Definition
 1. A way of recording and storing information 2. a means for analyzing locational distributions and spatial patterns. 3. A method of producing information and communicating findings
Supporting users have an ad free experience!