Test 1 -Best of- slides

Test 1 -Best of- slides - The Digital Earth From Mapping to...

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
The Digital Earth From Mapping to GIScience
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
In Talking About A Digital Earth WHAT is a common term for a “representation of the earth”? Of course – it’s a MAP!
Background image of page 2
So - What is a Map ? reduction of a visual reality (element of scale) contains an element of location (spatial) generalized and/or filtered features
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What Are Some Uses for Maps? Describe Some of the Maps You’ve Seen Direction and Orientation Exploration of Data (patterns, reduce data complexity) Display Results from Spatial Analysis
Background image of page 4
Because a Map is a Generalization The same feature (say a city) can be represented differently from map to map Feature representation varies based on the intent of the map Generalizing spatial data creates distortions Managing distortion and selecting which abstractions to apply creates a variety of map types
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Digital Maps Interact with Other Digital Content Too … The Weather Channel Where Do I Vote? Who Represents Me in Government? What friends are close to where I am right now? I Wanna Pizza … Facebook’s Friend Density or Cities I’ve Visited
Background image of page 6
1487
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Avignon, France
Background image of page 8
The Creation of a Digital Earth the science and technology available for spatial: measurement display analysis Is possible due to the …
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
To understand the To understand the Digital Earth Digital Earth we must understand: we must understand: How measurements are taken How measurements are taken How coordinate systems are established for maps How coordinate systems are established for maps A Digital Earth implies that spatial data are stored as coordinates that define the location and shape of geographic features (lakes, buildings, roads, etc.).
Background image of page 10
The Science of Measuring the Earth Geodesy
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Coordinate Systems Come in Two Basic Flavors (Planar)
Background image of page 12
Latitude Also known as " Parallels Measure of how far north or south a location is from the equator Numerical range (-90 to 0 to +90) Longitude Also known as " Meridians " Measure of how far east or west a place is from the Prime Meridian (Greenwich, England) Numerical range (-180 to 0 to +180) The Basis of Spherical Coordinates
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
There’s More to Life than X and Y Measuring a third dimension Traditionally measures elevation – or distance from the origin of a 3-d surface Commonly noted by the letter Z Can be measured in 2-D or 3-D space What does this last statement mean ?????
Background image of page 14
How Do We Describe the Shape of the Earth ?
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The Geoid is the term used to describe the surface that most closely approximates a mean sea level surface. Geog 105: The Digital Earth
Background image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/14/2011 for the course GEOG 105 taught by Professor Shirley during the Fall '10 term at South Carolina.

Page1 / 50

Test 1 -Best of- slides - The Digital Earth From Mapping to...

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online