Answers to Mid-Term Answers to Mid-Term Intro GIS Spring 2008Intro GIS Spring 2008

Paul C.SuttonPaul C.Sutton

psutton@du.edupsutton@du.edu

Department of GeographyDepartment of Geography

University of DenverUniversity of Denver

Overall Results: Mean 72.5

40 50 60 70 80 90 100

100.0%

99.5%

97.5%

90.0%

75.0%

50.0%

25.0%

10.0%

2.5%

0.5%

0.0%

maximum

quartile

median

quartile

minimum

92.000

92.000

92.000

89.600

81.000

76.000

64.000

47.400

41.000

41.000

41.000

Quantiles

Mean

Std Dev

Std Err Mean

upper 95% Mean

lower 95% Mean

N

72.529412

13.569809

3.291162

79.506364

65.55246

17

Moments

Mid-Term

Distributions

Multiple Choice

• Page 1: #1) D #2) E #3) A

• Page 2: #4) D #5) B #6) B #7) D #8) C #9) E

• Page 3: #10) A #11) E #12) B #13) D

#14) D #15) B

The Globe and Scale• 1 meter to 40,000 km is 1:40 million scale

• 10 cm to 1 meter is .1 &

.1 of 40,000 km is 4,000 km

If it takes 1 meter to go all the way around

(40,000 km) it should take half a meter to go

Half way around (20,000km) e.g. 50 cm

Many to One, One to Many oh my

One to One relationship

One to Many Relationship

Many to One

DEM (Digital Elevation Model) DEMs are Rasters

Good for representingA continuous surfaceAnd Hydro modeling

TIN Triangulated Irregular Network

TINs are VectorData – Basically

Points with ElevationAttributed connceted viaDelauney Triangulation

Better for some rapidGeo-viz applications

What is a GIS?• The hardware, software, and human capital

needed to store, manipulate, analyze, and display spatially referenced information.

• Problems uniquely suited to GIS…

• 1) Site selection for habitat preservation

• 2) Evaculation analysis and Management

• 3) Storing Census Data…..

Vector To Raster Conversion1

1

0

1

1

2

33

1 = Deer 2 = Coyote 3 = Penguin

1 = Land 0 = Sea

1 0 0 0 00 0 0 0 10 2 0 0 00 0 0 3 00 31 0 0 0

0 0 0 0 20 0 2 2 20 0 2 0 12 2 2 1 12 1 1 1 1

Rules youUse will Vary…