map project and scale - weebly
TRANSCRIPT
![Page 1: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/1.jpg)
MAPSPROJECTIONS
AND SCALE
![Page 2: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/2.jpg)
ALL MAPS LIE FLAT
AND
ALL FLAT MAPS LIE!
![Page 3: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/3.jpg)
Map projections
• There are many types of projections. Here are a few:
• Robinson
• Goode’s
• Eckert IV Equal Area
• Mercator
• Mollweide Equal Area
• Peters
![Page 4: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/4.jpg)
Issues
• Each type of map projection has problems—and the biggest problem is trying to fit a round globe onto a flat surface!
![Page 5: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/5.jpg)
• Based on tables of coordinates, not mathematical formulas. The projection distorts shape, area, scale, and distance in an attempt to balance the errors of projection properties.
![Page 6: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/6.jpg)
• Tears, or interruptions, minimize specific distortions. They are placed to group related parts of the map together. The Goode homolosine projection uses four distinct interruptions that cut through the oceans but leave major land masses untouched.
![Page 7: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/7.jpg)
• The central meridian and all parallels are at right angles, all other meridians are sinusoidal curves. Shape distortion increases at the poles. Scale is correct at standard parallels of 49:16 North and South.
![Page 8: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/8.jpg)
• Straight meridians and parallels that intersect at right angles. Scale is true at the equator or at two standard parallels equidistant from the equator. Used for marine navigation because all straight lines on the map are lines of constant azimuth.
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• The central meridian is straight. The 90th meridians are circular arcs. Parallels are straight, but unequally spaced. Scale is true only along the standard parallels of 40:44 N and 40:44 S.
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• De-emphasizes area exaggerations in high latitudes by shifting the standard parallels to 45 degrees.
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Scale
• Large scale—objects are large (large detail)
• E.g. 1:10,000
• Small scale—shows more of the Earth but the detail is less.
• E.g. 1:1,000,000
![Page 12: MAP Project and Scale - Weebly](https://reader030.vdocuments.us/reader030/viewer/2022012702/61a4783b9164f3226616ce44/html5/thumbnails/12.jpg)
Images showing scale—
Seattle, Washington
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Satellite view of the United States
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Map of the United States
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The United States