lsst.dax.apdb.pixelization.Pixelization Class Reference

Public Member Functions
	__init__ (self, str pixelization, int pix_level, int pix_max_ranges)
list[int]	pixels (self, sphgeom.Region region)
int	pixel (self, sphgeom.UnitVector3d direction)
sphgeom.Region	region (self, int pixel)
list[tuple[int, int]]	envelope (self, sphgeom.Region region)

Public Attributes
	pixelator = sphgeom.HtmPixelization(pix_level)

Protected Attributes
int	_pix_max_ranges = pix_max_ranges
bool	_is_healpix = False

Detailed Description

Wrapper for pixelization classes from `sphgeom` with configurable
pixelization type and parameters.

Parameters
----------
pixelization : `str`
    Name of a pixelization type, one of ""htm", "q3c", "mq3c", or
    "healpix".
pix_level : `int`
    Pixelization level.
pix_max_ranges : `int`
    Maximum number of ranges returned from `envelope()` method.

Member Function Documentation

envelope()

list[tuple[int, int]] lsst.dax.apdb.pixelization.Pixelization.envelope	(		self,
		sphgeom.Region	region )

Generate a set of HTM indices covering specified region.

Parameters
----------
region: `sphgeom.Region`
    Region that needs to be indexed.

Returns
-------
ranges : `list` of `tuple`
    Sequence of ranges, range is a tuple (minHtmID, maxHtmID).

pixel()

int lsst.dax.apdb.pixelization.Pixelization.pixel	(		self,
		sphgeom.UnitVector3d	direction )

Compute the index of the pixel for given direction.

Parameters
----------
direction : `lsst.sphgeom.UnitVector3d`

pixels()

list[int] lsst.dax.apdb.pixelization.Pixelization.pixels	(		self,
		sphgeom.Region	region )

Compute set of the pixel indices for given region.

Parameters
----------
region : `lsst.sphgeom.Region`

region()

sphgeom.Region lsst.dax.apdb.pixelization.Pixelization.region	(		self,
		int	pixel )

Return region corresponding to a pixel index.

Parameters
----------
pixel : `int`
    Pixel index.

Returns
-------
region : `lsst.sphgeom.Region`
    Region for a given pixel index.

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The documentation for this class was generated from the following file:

• python/lsst/dax/apdb/pixelization.py