MAP PROJECTIONS. What is a Map Projection? Properties of Map Projections Types of Map Projections.
Projections I
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Projections I Mills College 2009 SOC128 Geographic Information Systems and Sociological Geography
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Mills College 2009 SOC128 G eographic I nformation S ystems and Sociological Geography. Projections I. Outline. What do you need to know going forward Projections and coordinate systems. The Problem. - PowerPoint PPT Presentation
Transcript of Projections I
![Page 1: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/1.jpg)
Projections I
Mills College 2009
SOC128 Geographic Information Systems and Sociological Geography
![Page 2: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/2.jpg)
Outline
• What do you need to know going forward• Projections and coordinate systems
![Page 3: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/3.jpg)
The Problem
http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/topic/com.ibm.db29.doc.spatial/csb3022a.htm
![Page 4: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/4.jpg)
The Problem
• A “rectangle” on the earth’s surface…• …that is, a four cornered area aligned with
parallels and meridians
Awest, Bnorth Cwest, Bnorth
Awest, Dnorth Cwest, Dnorth
![Page 5: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/5.jpg)
The Problem
![Page 6: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/6.jpg)
![Page 7: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/7.jpg)
Consider 2 Square Areas on a Map
![Page 8: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/8.jpg)
Both are 1 unit x 1 unit
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![Page 9: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/9.jpg)
![Page 10: Projections I](https://reader036.fdocuments.in/reader036/viewer/2022082818/5681305c550346895d961e33/html5/thumbnails/10.jpg)
Credits