Flashcards in GEOG363 EXAM 1 Deck (57):

1

## data integration

### bringing different sets together to be used

2

## what does visualization do?

### it reveals hidden relationships between things to communicate ideas

3

## geoprocessing

### computing data onto a map

4

## hipsometric

### different colors describing different elevations

5

## Eucledian space is also known as

### cartesian coordinates

6

## tuple

### ordered set of numbers EG (x,y)

7

## topology

### ignores metric details and idenitfies relational structures or how things relate in space

8

## discrete

### has defiend edges

9

## continuoes

### does not have defined edges

10

## what type of map is discrete and has object view

### vector

11

## what type of map is continous and has field view

### raster

12

## tesselations

### pixels

13

## interval data

### continuous data that can be negative

14

## ratio

### has a natural zero EG height

15

## 3 componenets of geospatial data

###
spatial

thematic

temporal

16

## what 2 things define vector data

### magnitudew and direction

17

## 3 components of 3 tubule

### lat long and height

18

## node

###
has start, endpoint, intersection

is a special case of a vertx

19

## vertex

### simply a point on a line

20

## what do rows represent

### features

21

## what do columns represent

### attributes of features

22

## what do spherical coordinates measure

### angles with lambda and phi

23

## name 2 great circles on earth

### the equator and the prime meridian+int date line

24

## name 2 examples of small circles on earth

### the tropics of capricorn and cancer

25

## what is the difference in the way the prime meridian and the equator are determined

### the equator has right angles to the earth's axis and the prime meridian is arbitrary

26

## how is a geoid determined

### it is the physical model that is based on surface gravitational pull

27

## datum

### a set of reference points

28

## datum shift

### differences in coordinates between datum

29

## planimetric

### accurate with cartesian coordniates

30

## azimute

### defines the direction you are facing in degrees

31

## aspect

### position from which projection is centered and viewed

32

## transversal rotation

### rotating the globe so that north and south aren't up and down

33

## what does conformality preserve

### azimuths or direction and angles

34

## preserves area in projections

### equivalence

35

## tissot indicotric

### circles that represent distortion in projections

36

## if circles are circular what is being preserved

### conformity

37

## if circles remain the same size that preserve...

### equivalence

38

## what 2 things do cartesian systems have

### a fixed origin and coordinates

39

## generalization

### simplifying detailed lines when decreasing scale

40

## what is the most common shape of a tessellation

### square

41

## 2 terms that refer to pixels of raster images

### cells or more rarely grid elements

42

## whta is the smallest distinguishgable unit in a raster

### a cell

43

## nyquist shannnon smapling theory and which sub-field of GIS does it relate to

###
resolution should be atleast 1/2 as fine as the smallest image we wish to detect

remote sensing

44

## Any cell rule

###
always continuous but wider line

45

## Near center rule

### Thin line but may be discontinuous

46

## what does post processing do

### smooth lines when converting from raster to vector

47

## bit-depth

### how many bits

48

## TIN

### triangulated irrwegular network

49

##
Vector models produce smaller data sets

● Topological relations are better handled using vectors

● Analysis is simpler on raster data in many cases

● Overlays are simple in the raster model

● TINs provide flexible facet sizes (efficiency)

### k

50

## what do horizontal datums describe

### points against which latitude and longitude can be measured

51

## what do vertical datums describes

### points against which heigh or depth can be measured

52

## what is the most popular datum system and what two giants use it?

###
WGS 84

google earth and gps

53

## why does datum shift occur

### different datum points use different best fit ellipsoids of earth to best describe specific areas

54

## rhumb or loxodrome

### a course of constant bearing used by mariners

55

## 2 important properties of the Lambert conformal conic

### it is true along 2 standard parallels and works for a country's east to west expanse

56

## name 3 properties of the UTM

###
1. good for north to south expanse

2. are 6 degrees wide

3. origin is 500,000 meters west of central meridian (EQUATOR IS ZERO IN NORTHERN HEMISPHERE AND ANTARCTICE IS ZERO IN SOUTHERN

57