Interface: Projection

Projection is an interface that provides many methods used to represent the 3-dimensional surface of the earth or other round body on a 2-dimensional plane in cartography. The creation of a map projection involves two steps :

• selection of a model for the shape of the body (choosing between a sphere or ellipsoid),
• transform planetographic coordinates to plane coordinates.

Mizar owns different types of projection, which is used to represent a planet on a 2D map.

	AitoffProjection	Provides a AITOFF projection
	AugustProjection	Provides an august projection
	AzimuthProjection	Provides an azimuth projection
	MercatorProjection	Provides a mercator projection
	MollweideProjection	Provides a mollweide projection
	PlateProjection	Provides a plate carrée projection

See:

• the projection package

Methods

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getProjectionCenter()

Returns the projection center.

Returns:

the projection center (longitude in degree, latitude in degree)

Type

Array.<float>

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getGeoBound()

Returns the geobound

Returns:

Type

GeoBound

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unProject(position3d, dest)

Unprojects coordinates from a given 2D map to world coordinates

Parameters:

Name	Type	Description
position3d	Array.<float>	3D position on the map (x in pixel, y in pixel, altitude in meter)
dest	Array.<float>	physical position (longitude in degree, latitude in degree, altitude in meter)

Returns:

physical position (longitude in degree, latitude in degree, altitude in meter)

Type

Array.<float>

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project(geoPos, dest)

Projects the world coordinates to a given 2D map

Parameters:

Name	Type	Description
geoPos	Array.<float>	physical position (longitude in degree, latitude in degree, altitude in meter)
dest	Array.<float>	position on the map (x in pixel, y in pixel, altitude in meter)

Returns:

position on the map (x in pixel, y in pixel, altitude in meter)

Type

Array.<float>