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{{POTD {{{1|{{{style|default}}}}}} |
{{POTD {{{1|{{{style|default}}}}}} |
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|image=Polyconic projection |
|image=American Polyconic projection.jpg |
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|size=380 |
|size=380 |
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|title= [[Polyconic projection|American Polyconic projection]] |
|title= [[Polyconic projection|American Polyconic projection]] |
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|caption= |
|caption= |
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The '''[[Polyconic projection|American Polyconic projection]]''' is a [[map projection]] conceptualized as "rolling" a cone tangent to the Earth at |
The '''[[Polyconic projection|American Polyconic projection]]''' is a [[map projection]] conceptualized as "rolling" a separate cone tangent to the Earth at each parallel of latitude, rather than a single cone as in a normal conic projection. Each parallel is a circular arc of true scale. The scale is also true on the central meridian of the projection. This projection was in common use by many map-making agencies of the United States from the time of its proposal by [[Ferdinand Rudolph Hassler]] in 1825 until the mid-20th century. |
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|credit= |
|credit=Map: [[User:Strebe|Strebe]], using Geocart |
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}}<noinclude>[[Category:Wikipedia Picture of the day {{#time:F Y|{{SUBPAGENAME}}}}]] |
}}<noinclude>[[Category:Wikipedia Picture of the day {{#time:F Y|{{SUBPAGENAME}}}}]] |
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</noinclude> |
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==See also== |
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*[[Template:POTD{{#ifeq:{{BASEPAGENAME}}|POTD protected||_protected}}/{{SUBPAGENAME}}]]</noinclude> |
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Latest revision as of 00:04, 19 March 2019
The American Polyconic projection is a map projection conceptualized as "rolling" a separate cone tangent to the Earth at each parallel of latitude, rather than a single cone as in a normal conic projection. Each parallel is a circular arc of true scale. The scale is also true on the central meridian of the projection. This projection was in common use by many map-making agencies of the United States from the time of its proposal by Ferdinand Rudolph Hassler in 1825 until the mid-20th century.Map: Strebe, using Geocart