Geo 160 Exam 1 Flashcards Preview

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Flashcards in Geo 160 Exam 1 Deck (52):
1

Datum

Measurements, Records

2

Information

Records that have meaning to you

3

Knwoledge

Information you are ready to act upon

4

variables

data relevant to a particular problem (Car color)

5

Values

Silver

6

what is geographic data

data that contaisn coordinates

7

what is an attribute

a geographic variable

8

name 2 things all coordinate systems require

origin and oreintation

9

projection

a systematic transformation from a round surface to flat surface

10

developable surfaces

surfaces that can be turned into a plane

11

name 2 developable surfaces

cone and cylinder

12

what do equal area maps preserve

surface area of depicted objects across entire map

13

what do conformal maps preserve

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

14

what do equidistant maps preserve?

scale along specific lines, but not entire map

15

what do azimuthal projections preserve

directions from one selcted point to all other points on map

16

Reference maps

Have no single stpry about them - multiple purposes

17

reference map examples

google maps, topo maps

18

thematiuc maps

tell a storey about spatial phenomenom

19

5 steps of the cartographic process

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

20

data symbolization

color, hue, etc

21

name 3 common data classification processes

equal interval, quantile, manual

22

feature

the where of a spatial object

23

attribute

the what of a spatial object

24

the three msot typical ways to talk about the "where?"

through points, lines, and polygons

25

nominal

qualitative categories that cannot be ordered

26

ordnial

qualitative categories that have natural order

27

interval

numbers that can be negative

28

ratio

numbers that cannot be negative

29

database

organized collection of data

30

simplest way to organize data

table

31

what is the column of columns of a table called

the primary key

32

dbms

database management systems

33

metadata

data about your data

34

georgraphic data made using geometricprimitives

vector data

35

geograpic data using a regular grid

raster

36

a table containg information on all gps satellites

almanac

37

precision

consistency of measurements

38

accuracy

how close you get to the target, oin average

39

scale orientation

map'/IRL

40

polar coordinate

degree of angle and distance from origin

41

cartesian

simple plotting system

42

geographic

lat and long

43

quantile

break data into 4 equal catagories

44

equal interval

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

45

gdop

geometric delusion of position

46

dgps

differential gps - finds errors to get more accuracy

47

waas

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

48

rtk

real time kinjematic - accuracy of 1-2mm

49

what does gps work on

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

50

wgs84

world geodetic system

51

trilateration

location of objects through distance

52

triangulation

location of objects through angles