Package ucar.unidata.geoloc

Interface Projection

public interface Projection

Projective geometry transformations from (lat,lon) to (x,y) on a projective cartesian surface.

Method Summary

Modifier and Type	Method	Description
boolean	crossSeam(ProjectionPoint pt1, ProjectionPoint pt2)	Does the line between these two points cross the projection "seam", which is a discontinuity in the function latlon to/from projection plane
String	getClassName()	The name of the implementing class.
String	getName()	The name of this projection.
AttributeContainer	getProjectionAttributes()	Get projection parameters.
boolean	isLatLon()	Is this the lat/lon Projection?
default ProjectionPoint	latLonToProj(double lat, double lon)	Convert lat, lon to Projection point.
ProjectionPoint	latLonToProj(LatLonPoint latlon)	Convert a LatLonPoint to projection coordinates.
ProjectionRect	latLonToProjBB(LatLonRect latlonRect)	Convert a lat/lon bounding box to a world coordinate bounding box, by finding the minimum enclosing box.
default LatLonPoint	projToLatLon(double x, double y)	Convert projection x, y to LatLonPoint point.
LatLonPoint	projToLatLon(ProjectionPoint ppt)	Convert projection coordinates to a LatLonPoint.
LatLonRect	projToLatLonBB(ProjectionRect bb)	Compute lat/lon bounding box from projection bounding box.

Method Detail

getClassName

String getClassName()

The name of the implementing class.

getName

String getName()

The name of this projection.

isLatLon

boolean isLatLon()

Is this the lat/lon Projection?

latLonToProj

default ProjectionPoint latLonToProj(double lat,
                                     double lon)

Convert lat, lon to Projection point.

latLonToProj

ProjectionPoint latLonToProj(LatLonPoint latlon)

Convert a LatLonPoint to projection coordinates.

projToLatLon

default LatLonPoint projToLatLon(double x,
                                 double y)

Convert projection x, y to LatLonPoint point.

projToLatLon

LatLonPoint projToLatLon(ProjectionPoint ppt)

Convert projection coordinates to a LatLonPoint.

crossSeam

boolean crossSeam(ProjectionPoint pt1,
                  ProjectionPoint pt2)

Does the line between these two points cross the projection "seam", which is a discontinuity in the function latlon to/from projection plane

Parameters:

pt1 - the line goes between these two points

pt2 - the line goes between these two points

Returns:

false if there is no seam, or the line does not cross it.

getProjectionAttributes

AttributeContainer getProjectionAttributes()

Get projection parameters. Add as Attributes to a Coordinate Transform Variable (ctv).

latLonToProjBB

ProjectionRect latLonToProjBB(LatLonRect latlonRect)

Convert a lat/lon bounding box to a world coordinate bounding box, by finding the minimum enclosing box. Handles lat/lon points that do not intersect the projection panel.

Parameters:

latlonRect - input lat,lon bounding box

Returns:

minimum enclosing box in world coordinates, or null if no part of the LatLonRect intersects the projection plane

projToLatLonBB

LatLonRect projToLatLonBB(ProjectionRect bb)

Compute lat/lon bounding box from projection bounding box.

Parameters:

bb - projection bounding box

Returns:

lat, lon bounding box.