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Last modified: December 2009

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AHELP for CIAO 4.2


Context: py.transform


TRANSFORMS - A high-level interface for the Transform library


TRANSFORMS is a software package developed by the Chandra X-Ray Center (CXC) to provide a means of applying mathematical operations to data in order to convert it from one reference frame to another. Various Transform objects can be strung together to create complex operations.

The library can be used as a standalone system, and is incorporated into the CRATES package to support the generation and use of "virtual" data objects (see "ahelp cratedata"). To date, there is one Transform flavor defined:

  • WCSTAN - WCS Tangent plane projection

The Python code is automatically loaded when the CRATES module is loaded. There are help files for each of the Transform commands:

"ahelp -c py.transform"


See the bug pages on the CIAO website for an up-to-date listing of known bugs.

Last modified: December 2009