First Test Textbook

Question 1

Discrete Data

Answer 1

are objects in the real world with specific locations or boundaries, such as houses, cities, roads, or counties

Question 2

continuous data

Answer 2

represent quantities that may be measured anywhere on the earth, such as temperature or elevation

Question 3

vector model

Answer 3

which is designed to store discrete data

Question 4

raster model

Answer 4

which is designed to store continuous data

Question 5

both models are georeferenced

Answer 5

vector and raster

Question 6

geospatial

Answer 6

data and software used to work with georeferenced information are encompassed by the vernal term.

Question 7

basic shapes to represent discrete objects that vector model

Answer 7

features; include point, polygon,line

Question 8

feature class

Answer 8

similar features stored together; can store only one type of feature: points, or lines or polygons but never a combination

Question 9

map scales

Answer 9

a measure of the size at which features in a map are represented

Question 10

source scale

Answer 10

a scale that geographic data set has; the original scale or resolution at which it was created or converted to digital form.

Question 11

scale range

Answer 11

specifies the range of scales for which the display of the data is valid so that it will only be shown at those scales

Question 12

geometric accuracy

Answer 12

describes how closely the x-y values of a data set correspond to the actual locations on the earth surface

Question 13

thematic accuracy

Answer 13

refers to the attributes stored in the table

Question 14

resolution

Answer 14

refers to the sampling interval at which data are acquired; may be spatial, thematic or temporal; indicates at what distance interval measurements are taken or recorded

Question 15

precision

Answer 15

refers to either the number of significant digits used to record a measurement or the statistical variation of a repeated single measurement

Question 16

convention

Answer 16

refers to the use of a particular color or symbol in a commonly understood way

Question 17

nominal data

Answer 17

name or identify objects, such as the names of states

Question 18

categorical data

Answer 18

separate features into distinct groups or classes

Question 19

ordinal data

Answer 19

have categories that are ranked based on some quantitative measure, although the measure may not be linear

Question 20

ratio data

Answer 20

have a meaningful zero point that indicates the absence of the thing being measured

Question 21

interval data

Answer 21

have a regular scale but are not related to a meaningful zero point

Question 22

graduated symbol map

Answer 22

point or line data are usually displayed by varying symbol size or thickness and are portrayed using this

Question 23

proportional symbol map

Answer 23

point or line data is portrayed; which the numeric value is used to proportionally determine the size of the symbol

Question 24

graduated color maps or choropleth maps

Answer 24

numeric data classes for polygons are represented using color shaded symbols

Question 25

bivariate choropleth map

Answer 25

can be used to compare the spatial patterns of two numeric variables

Question 26

dot density map

Answer 26

uses randomly placed dots inside each polygon to show magnitude of a value in the attribute table

Question 27

chart map

Answer 27

is a type of graduated symbol map that replaces the symbol, such as circle or triangle with a small bar or pie chart capable of showing several variables at once

Question 28

thematic raster

Answer 28

represents features or quantities such as roads, geology, elevation or vegetation density