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map2gif

This Fortran facility provides a means to generate a gif image from an input HEALPix sky map. It is intended to allow some primitive visualisation for those with limited or no access to IDL. It is also useful for image generation in a pipeline environment.

FORMAT

% map2gif

QUALIFIERS

- bar

Logical which determines whether a color bar is displayed default:.false..

- col

The number of the color table to utilise default:5.

- hlp

Print on-line help for the facility.

- inp

The file name of the input FITS sky map (default : none).

- log

Logical to use the log of the signal when plotting default:.false.

- ash

Logical to use the hyperbolic arc sine of the signal when plotting. Cannot be true when -log is true. default:.false.

- add

Real value to add to the signal before performing any other operation to it (like taking the logarithm etc.) default:0.0

- mul

Real value to multiply the signal with directly after adding the offset (see above). default:1.0

- min

Set the minimum value for the plotted signal default:is to use the actual signal minimum.

- max

Set the maximum value for the plotted signal default:is to use the actual signal maximum.

- pro

Select the projection scheme default:Mollweide.

- out

The file name of the output gif image (default : none).

- sig

The identifier of the signal to plot: for a polarisation map, then the mapping is 1 = I; 2 = Q; 3 = U default:1.

- ttl

A string specifying the title for the plot (default : none).

- xsz

The x-dimension of the image in pixels default:800.

DESCRIPTION

map2gif reads in a HEALPix sky map in FITS format and generates an image in GIF format. map2gif allows the selection of the projection scheme (Mollweide or Gnomonic for small patches of the sky), color table, color bar inclusion, linear or log scaling, maximum and minimum range for the plot and plot-title. The facility utilises a command-line interface.

DATASETS

The following datasets are involved in the map2gif processing.

SUPPORT

This section lists those routines and facilities (including those external to the Healpix distribution) which can assist in the utilisation of map2gif.

xv

xv or a similar facility is required to view the gif image generated by map2gif (a browser can also be used).

synfast

This HEALPix facility will generate the FITS format sky map to be input to map2gif.

EXAMPLE # 1:

map2gif reads in the map `planck100GHZ-LFI.fits' and generates an output gif image with name `planck100GHZ-LFI.gif' in which the temperature scale has been set to lie between 100 (K), a color bar has been drawn and the title `Simulated Planck LFI Sky Map at 100GHz' appended to the image.

RELEASE NOTES

Initial release (HEALPix 1.00)

MESSAGES

This section describes error messages generated by map2gif

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