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Helen Smith's List: Map related
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Jan 26, 10
The term 'coordinate system' can refer to data in a Geographic Coordinate System (GCS) with coordinates in decimal degrees; or a Projected Coordinate System (PCS) with linear units in meters or feet. The term projection or PRJ, is an older term that is also used, but it is not as precise.
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The term 'coordinate system' can refer to data in a Geographic Coordinate System (GCS) with coordinates in decimal degrees; or a Projected Coordinate System (PCS) with linear units in meters or feet. The term projection or PRJ, is an older term that is also used, but it is not as precise.
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Mar 27, 10
described in their Simple Feature Access and
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Mar 28, 10
Typically the cone intersects the sphere at one or two parallels, chosen as standard lines.
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Typically the cone intersects the sphere at one or two parallels, chosen as standard lines.
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When infinitely many cones are used, each optimally tangent to a thin strip containing a single parallel, the gaps disappear; if the central meridian has constant correct scale, the result is the classic or common polyconic projection, also called American polyconic.
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