Package gavo :: Package stc :: Module bboxes

Module bboxes

Computing bboxes for STC geometries.

A bbox coming out of this module is a 4-tuple of (ra0, de0, ra1, de1) in ICRS degrees.

(You're right, this should be part of the dm classes; but it's enough messy custom code that I found it nicer to break it out).

Classes
	GCSegment A great circle segment on a sphere.

Functions

getHeading(long1, lat1, long2, lat2)
returns the initial heading when going from one spherical position to another along a great circle.

source code

source code

fromRad(bbox)

source code

joinBboxes(*bboxes)
returns a bounding box encompassing all the the bboxes passed in.

source code

getBboxes(ast)
iterates over the bboxes of the areas within ast.

source code

Variables
	__package__ = `'gavo.stc'`

Function Details

returns the initial heading when going from one spherical position to another along a great circle.

Everything is in rad, angle is counted north over east.

Decorators:

returns a bounding box encompassing all the the bboxes passed in.

No input bbox must cross the stitching line; they must be normalized, i.e., lower left and upper right corners.

iterates over the bboxes of the areas within ast.

bboxes are (ra0, de0, ra1, de1) in ICRS degrees.