Gis

Front 1

Attribute

Back 1

describes the characteristics of spatial features

Front 2

Entities

Back 2

A general term for a real world thing

Front 3

Geographic

Back 3

Location/place/space

Front 4

GIS as an integrating technology

Back 4

Computer system for storing, querying, capturing, analyzing and displaying spatial data

Front 5

World in a box GIS video

Back 5

talked about importance of GIS in forestry, disease spreading, and poverty/famine

Front 6

GIS and components

Back 6

Geographic Information System
-Hardware
-Software
-User
-Data
-Infrastructure

Front 7

2 types of location

Back 7

Absolute (lat and long) and Relative (compared to other places)

Front 8

Vector Data

Back 8

Advantages:
Since most data, e.g. hard copy maps, is in vector form no data conversion is required. Accurate geographic location of data is maintained.

Disadvantages
The location of each vertex needs to be stored explicitly. Spatial analysis and filtering within polygons is impossible

Store information

Front 9

Raster Data

Back 9

Advantages
The geographic location of each cell is implied by its position in the cell matrix. Accordingly, other than an origin point, e.g. bottom left corner, no geographic coordinates are stored. Due to the nature of the data storage technique data analysis is usually easy to program and quick to perform

Disadvantages
The cell size determines the resolution at which the data is represented.It is especially difficult to adequately represent linear features depending on the cell resolution. Accordingly, network linkages are difficult to establish

Store information

Front 10

Topology

Back 10

study of those properties of geometric objects that remain invariant under certain transformations like bending or stretching

Front 11

Spaghetti Model

Back 11

simplest form of a vector data structure representing the geo image as a series of independent (x,y) coordinate strings

Front 12

Entity View

Back 12

use to view how entities are positioned with respect to one another

Front 13

Field View

Back 13

assumes that the real world is a continuous maps or layers, each representing the variability of a certain attribute over the Earth's surface

Front 14

Shapefile

Back 14

georelational, non topologic, attributes, cartography are stored separately

Front 15

Georelational Data Model

Back 15

data model that stores geometries and attributes in two separate but related file systems

Front 16

Object Based Data Model

Back 16

treats geospatial data as attributes. stores geometries and attributes in a single system

Front 17

Four levels of Measurement (NOIR)

Back 17

Nominal
Ordinal
Interval
Ratio

Front 18

Nominal

Back 18

objects are categorized with names, identifiers or labels such as colors like red, yellow and blue. Another example is the answers on a survey sheet, Yes, No, and Undecided

Front 19

Ordinal

Back 19

The data can be ordered. Course grades A, B, C, D, and E are an example

Front 20

Interval

Back 20

data can be ordered and the values in between the data has meaning (degrees F are an example)

Front 21

Ratio

Back 21

There is a natural zero starting point and differences and ratio have meaning

Front 22

DOQ

Back 22

Aerial photo that has been ortho rectified. Fixes distortion. Things that are straight will be straight, gets rid of curves, represents whats on ground, no distortion photograph

Front 23

DRG

Back 23

A scanned topographic map. Outline elevation, cities, standard parameters of US

Front 24

GIS and components

Back 24

Geographic Information System
-Hardware
-Software
-User
-Data
-Infrastructure

Front 25

2 types of location

Back 25

Absolute (lat and long) and Relative (compared to other places)

Front 26

Vector Data

Back 26

Advantages:
Since most data, e.g. hard copy maps, is in vector form no data conversion is required. Accurate geographic location of data is maintained.

Disadvantages
The location of each vertex needs to be stored explicitly. Spatial analysis and filtering within polygons is impossible

Store information

Front 27

Raster Data

Back 27

Advantages
The geographic location of each cell is implied by its position in the cell matrix. Accordingly, other than an origin point, e.g. bottom left corner, no geographic coordinates are stored. Due to the nature of the data storage technique data analysis is usually easy to program and quick to perform

Disadvantages
The cell size determines the resolution at which the data is represented.It is especially difficult to adequately represent linear features depending on the cell resolution. Accordingly, network linkages are difficult to establish

Store information

Front 28

Topology

Back 28

study of those properties of geometric objects that remain invariant under certain transformations like bending or stretching

Front 29

Spaghetti Model

Back 29

simplest form of a vector data structure representing the geo image as a series of independent (x,y) coordinate strings

Front 30

Entity View

Back 30

use to view how entities are positioned with respect to one another

Front 31

Field View

Back 31

assumes that the real world is a continuous maps or layers, each representing the variability of a certain attribute over the Earth's surface

Front 32

Shapefile

Back 32

georelational, non topologic, attributes, cartography are stored separately

Front 33

Georelational Data Model

Back 33

data model that stores geometries and attributes in two separate but related file systems

Front 34

Object Based Data Model

Back 34

treats geospatial data as attributes. stores geometries and attributes in a single system

Front 35

Geodatabase

Back 35

GET INFO

Front 36

Four levels of Measurement (NOIR)

Back 36

Nominal
Ordinal
Interval
Ratio

Front 37

Nominal

Back 37

objects are categorized with names, identifiers or labels such as colors like red, yellow and blue. Another example is the answers on a survey sheet, Yes, No, and Undecided

Front 38

Ordinal

Back 38

The data can be ordered. Course grades A, B, C, D, and E are an example

Front 39

Interval

Back 39

data can be ordered and the values in between the data has meaning (degrees F are an example)

Front 40

Ratio

Back 40

There is a natural zero starting point and differences and ratio have meaning

Front 41

Elements of a Raster Data Model

Back 41

GET INFO

Front 42

DOQ

Back 42

Aerial photo that has been ortho rectified. Fixes distortion. Things that are straight will be straight, gets rid of curves, represents whats on ground, no distortion photograph

Front 43

DRG

Back 43

A scanned topographic map. Outline elevation, cities, standard parameters of US

Front 44

Places to obtain data

Back 44

local govt/state websites

Front 45

Freedom of Information Act

Back 45

any info, federally collected data, we as taxpayers have the right to access and view the data

Front 46

TIGER database

Back 46

roads, boundaries, topological, in constant evolution. contains legal and statistical are boundaries which can be linked to the census data

Front 47

Metadata

Back 47

data that provides info about geospatial data

Front 48

Remote Sensing

Back 48

small or large scale acquisition of info of an object or phenomenon by the use of either recording or real-time sensing device(s) that are wireless, or not in physical contact w/ the object (such as by way of aircraft, spacecraft, satellite, bouoy or ship)

Front 49

GPS

Back 49

Global positioning systems. good at getting location info, primary data source

Front 50

2 ways to get data

Back 50

GET INFO

Front 51

Ways of entering data

Back 51

Scanning, digitizing, image processing, GPS, Surveying, geocoding

Front 52

Georeferencing

Back 52

to define its existence in physical space (establishing its location in terms of map projections or coordinate systems)

Front 53

Geocoding

Back 53

Taking non spatial data and making it spatial / GIS ready. Taking XY location and creating a point data set. 3 Steps: 1-Parse Geocode 2- Match to reference 3- Estimate location.