Map projection - Wikipedia, the free encyclopedia
|
|
A map projection is any method of representing the surface of a sphere or other shape on a plane. Map projections are necessary for creating maps. All map projections distort the surface in some fas...
en.wikipedia.org/wiki/Map_projection
|
|
Compression: Gnomonic projections do distort areas; they are not equivalent. Like shearing, the amount of compression in a gnomonic map increases rapidly as you move away from the point of tangency.
|
warnercnr.colostate.edu/class_info/nr502/lg2/projection...
warnercnr.colostate.edu/class_info/nr502/lg2/projection_descriptions/gnomonic.html
|
|
|
False Easting, mandatory the value added to all "x" values in the rectangular coordinates for a map projection. This value frequently is assigned to eliminate negative numbers. Expressed in the unit of measure identified in Planar Coordinate Units. ... The following elements comprise the Gnomonic Map Projection section:
|
www.icbemp.gov/spatial/fgdc/spatial_reference/gnomonic....
www.icbemp.gov/spatial/fgdc/spatial_reference/gnomonic.html
|
|
|
|
A map projection is used to portray all or part of the round Earth on a flat surface. This cannot be done without some distortion. ... (Sometimes used with Gnomonic map on which any straight line is on a great circle and shows shortest path between two points).
|
egsc.usgs.gov/isb/pubs/MapProjections/projections.html
egsc.usgs.gov/isb/pubs/MapProjections/projections.html
|
|
|
|
The Gnomonic projection is one which has a greater expansion, ... It is constructed by projecting every point on the globe appearing in the map onto the plane of the map from an imagined light source in the center of the globe. Great circles on the globe are all bands like the Equator, which are defined by planes cutting...
|
members.shaw.ca/quadibloc/maps/maz0201.htm
members.shaw.ca/quadibloc/maps/maz0201.htm
|
|
|
Gnomonic(LatLonPoint center, float scale, int width, int height); Construct a Mercator projection ... The Gnomonic name. ... The Gnomonic type of projection.
|
www.openmap.net/doc/api/com/bbn/openmap/proj/Gnomonic.h...
www.openmap.net/doc/api/com/bbn/openmap/proj/Gnomonic.html
|
|
The graticule described is for a polar aspect. ... Meridians: Equally spaced straight lines intersecting at the central pole. The angles displayed are the true angles between meridians. ... Parallels: Unequally spaced circles centered on the central pole. Spacing increases rapidly away from this pole. The Equator and the...
|
www.phys.ufl.edu/docs/matlab/toolbox/map/gnomonicprojec...
www.phys.ufl.edu/docs/matlab/toolbox/map/gnomonicprojection.html
|
|
Gnomonic Projection - ... Meridians: Equally spaced straight lines intersecting at the central pole. The angles displayed are the true angles ... Parallels: Unequally spaced circles centered on the central pole. Spacing increases rapidly away from this pole. The Equator and the opposite hemisphere cannot be shown...
|
www.mathworks.com/access/helpdesk/help/toolbox/map/gnom...
www.mathworks.com/access/helpdesk/help/toolbox/map/gnomonicprojection.html
|
|
The concept of gnomonic projection requires some explanation. It is the only map projection that shows great circles as straight lines - thus all meteors Our gnomonic map is the plane tangent to the sphere at point P. The center of projection is O. From O all stars on the sphere are projected onto the plane of the map...
|
www.imo.net/visual/minor/gnomic
|
|
