gis mapping data

Question 1

nominal data

Answer 1

values that name or identify an object, such as a street name

Question 2

categorical data

Answer 2

data that places objects in unranked groups

Question 3

numeric data

Answer 3

values stored as numbers rather than as names or categories

Question 4

unique values map

Answer 4

a map type in which each attribute is assigned its own symbol

Question 5

ordinal data

Answer 5

data value that indicates rank or ordering system

Question 6

ratio data

Answer 6

data having regular scale of measurement and a natural zero point, such as percipitation or population

Question 7

interval data

Answer 7

values that follow a normal scale but have no naturalk zero point, such as degrees or celsius

Question 8

graduated symbol map

Answer 8

A map with symbols that change in size according to the value of the attribute they represent. For example, denser populations might be represented by larger dots, or larger rivers by thicker lines

Question 9

proportional symbol map

Answer 9

a map that displays attribute values with marker or line symbols that are proportional in size relaltive to the value of the feature

Question 10

graduated color map

Answer 10

map that divides numeric datafrom polygon feature class into classes based on value and displays the classes with different colors

Question 11

choropleth map

Answer 11

maps in which each feature , such as a state, is clored according to values in a data field

Question 12

normalized data

Answer 12

to divide the values of an attribute field by the total of the field or by the values in another field

Question 13

dot density map

Answer 13

a map representing attribute values bay a proportional number of randomly placed dots

Question 14

chart map

Answer 14

map showing several different attributes in shart form, with one chart for each feature

Question 15

thematic rasters

Answer 15

a raster that contains categorical or nominal data values, such as land use codes or soil types

Question 16

discrete

Answer 16

data that take on a relatively small number of distinct values

Question 17

continuous

Answer 17

data that take on a variety of different values and that change rapidly across a data set , such as elevation

Question 18

unique values

Answer 18

a map type in which each attribute is assigned its own symbol

Question 19

classified

Answer 19

raster display mathod that divides values into two or more groups based on their numeric values

Question 20

stretched

Answer 20

a display method that spreads the data values over the entire range of symbols available

Question 21

slice

Answer 21

to divide the values in a raster into a specified number of even classes

Question 22

image rasters

Answer 22

raster data layer, usually refering to a raster that displays brightness values, as ina photograph

Question 23

histogram

Answer 23

a graph showing the number of pixels contained for each data value in a raster

Question 24

colormap

Answer 24

set of defined colors matched to specific image pixel values, which determines how the image wil appear

Question 25

classification

Answer 25

assigning features to two or more groups based on numeric values in an attribute fields

Question 26

Jenks method

Answer 26

a way to classify numeric data into ranges defined by naturally occuring gaps in the data histogram

Question 27

equal interval

Answer 27

a classification method in which the user specifies a number of classes that have equal size ranges

Question 28

defined interval

Answer 28

a classification method in which the user specifies a specific size range range for all the classes

Question 29

quantile map

Answer 29

map type in which each class has approximately the same number of features

Question 30

geometric interval

Answer 30

a classification method that bases the class intervals on a geometric series in which each class is multiplied by a constant coefficient to produce the next higher class

Question 31

standard deviation

Answer 31

a classification scheme in which the class breaks are based on the standard deviation values of the data being mapped

Question 32

layer

Answer 32

reference to a feature class ad its associated properties

Question 33

data frame

Answer 33

container holding layers that are viewed and analyzed together; a map view

Question 34

active frame

Answer 34

the data frame that is visible and responds to changes by the user

Question 35

source

Answer 35

a location that produces or initiates the flow of a commodity through a network; a spatial data file that provides the featuers for a map layer; the original information used to develop a spatial dataset

Question 36

pathname

Answer 36

a list of the folders that must be traversed to locate a particular file

Question 37

absolute pathname

Answer 37

file pathname that starts at the drive letter

Question 38

relative pathname

Answer 38

path to a file that starts in the current folder

Question 39

data view

Answer 39

data frame mode optimized for the display and analysis of map data

Question 40

layout view

Answer 40

a mode of ArcMap that is used to design and create a printed map and that allows manipulation of map layers, titles, scale bars, north arrows, and more

Question 41

dynamic labels

Answer 41

labels determined from an attribute and placed on a map automatically each time features are drawn and redrawn

Question 42

pyramids

Answer 42

set of rasters with different resolutions that is calculated from a raster and used to speed displays at smaller displays.In raster datasets, a reduced resolution layer that copies the original data in decreasing levels of resolution to enhance performance. The coarsest level of resolution is used to quickly draw the entire dataset. As the display zooms in, layers with finer resolutions are drawn; drawing speed is maintained because fewer pixels are needed to represent the successively smaller areas.

Question 43

rgb composite

Answer 43

an image displayed by assigning one band of brightness information to each red, green, and blue color gun in a display monitor

Question 44

(DRG) Digital Raster Graphic

Answer 44

scanned image of a USGS topographic map