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College! > Geo 160 Exam 1 > Flashcards

Geo 160 Exam 1 Flashcards

1
Q

Datum

A

Measurements, Records

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2
Q

Information

A

Records that have meaning to you

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3
Q

Knwoledge

A

Information you are ready to act upon

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4
Q

variables

A

data relevant to a particular problem (Car color)

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5
Q

Values

A

Silver

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6
Q

what is geographic data

A

data that contaisn coordinates

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7
Q

what is an attribute

A

a geographic variable

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8
Q

name 2 things all coordinate systems require

A

origin and oreintation

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9
Q

projection

A

a systematic transformation from a round surface to flat surface

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10
Q

developable surfaces

A

surfaces that can be turned into a plane

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11
Q

name 2 developable surfaces

A

cone and cylinder

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12
Q

what do equal area maps preserve

A

surface area of depicted objects across entire map

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13
Q

what do conformal maps preserve

A

the shapes of small features, but not across the entire map

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14
Q

what do equidistant maps preserve?

A

scale along specific lines, but not entire map

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15
Q

what do azimuthal projections preserve

A

directions from one selcted point to all other points on map

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16
Q

Reference maps

A

Have no single stpry about them - multiple purposes

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17
Q

reference map examples

A

google maps, topo maps

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18
Q

thematiuc maps

A

tell a storey about spatial phenomenom

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19
Q

5 steps of the cartographic process

A 
Data selection
Spatial simplification 
Smoothing, aggregation, typification (e.g. cartograms)
Spatial exaggeration
Data classification
Data symbolization
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20
Q

data symbolization

A

color, hue, etc

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21
Q

name 3 common data classification processes

A

equal interval, quantile, manual

22
Q

feature

A

the where of a spatial object

23
Q

attribute

A

the what of a spatial object

24
Q

the three msot typical ways to talk about the “where?”

A

through points, lines, and polygons

25
Q

nominal

A

qualitative categories that cannot be ordered

26
Q

ordnial

A

qualitative categories that have natural order

27
Q

interval

A

numbers that can be negative

28
Q

ratio

A

numbers that cannot be negative

29
Q

database

A

organized collection of data

30
Q

simplest way to organize data

A

table

31
Q

what is the column of columns of a table called

A

the primary key

32
Q

dbms

A

database management systems

33
Q

metadata

A

data about your data

34
Q

georgraphic data made using geometricprimitives

A

vector data

35
Q

geograpic data using a regular grid

A

raster

36
Q

a table containg information on all gps satellites

A

almanac

37
Q

precision

A

consistency of measurements

38
Q

accuracy

A

how close you get to the target, oin average

39
Q

scale orientation

A

map’/IRL

40
Q

polar coordinate

A

degree of angle and distance from origin

41
Q

cartesian

A

simple plotting system

42
Q

geographic

A

lat and long

43
Q

quantile

A

break data into 4 equal catagories

44
Q

equal interval

A

make a scale from high to low and break scale ito 4 catagories

45
Q

gdop

A

geometric delusion of position

46
Q

dgps

A

differential gps - finds errors to get more accuracy

47
Q

waas

A

wide area augmentation system - grid of base receivers across USA to correct accuracy

48
Q

rtk

A

real time kinjematic - accuracy of 1-2mm

49
Q

what does gps work on

A

a geocentric system that doesn’t use lat and ;long

50
Q

wgs84

A

world geodetic system

51
Q

trilateration

A

location of objects through distance

52
Q

triangulation

A

location of objects through angles

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