mPNGWWTExec(1)

mPNGWWTExec1

None

Usage

mPNGWWTExec [-d lev] colorTable tileLevel baseName grayDir gray.hist pngDir

mPNGWWTExec -c [-d lev] trueColor tileLevel baseName blueTileDir blue.hist greenTileDir green.hist redTileDir red.hist pngDir

Overview

Runs mViewer for all the tiles needed for a WWT TOAST set. FITS tile files should already have been generated using mProjWWTExec.

Options

-c

Switches to color mode (different argument set)

-d level

Turns on debugging to some level

Arguments

colorTable

The grayscale color table. See mViewer docs for details.

tileLevel

The depth of WWT TOAST tiles desired. This should be no bigger than the depth to which FITS files were created.

baseName

Base name for tiles. For instance, an output tile named "planck3102.png" has the base name "planck".

grayDir

Directory containing grayscale FITS TOAST files, previously created with mProjWWTExec.

gray.hist

Histogram used for stretching grayscale FITS files, previously created with mHistogram.

pngDir

Directory for output PNGs.

trueColor

Color enhancement parameter. See mViewer docs for details; set to zero for no special enhancement.

tileLevel

The depth of WWT TOAST tiles desired. This should be no bigger than the depth to which FITS files were created.

baseName

Base name for tiles. For instance, an output tile named "planck3102.png" has the base name "planck".

blueDir

Directory containing blue FITS TOAST files, previously created with mProjWWTExec.

blue.hist

Histogram used for stretching blue FITS files, previously created with mHistogram.

greenDir

Directory containing green FITS TOAST files, previously created with mProjWWTExec.

green.hist

Histogram used for stretching green FITS files, previously created with mHistogram.

redDir

Directory containing red FITS TOAST files, previously created with mProjWWTExec.

red.hist

Histogram used for stretching red FITS files, previously created with mHistogram.

pngDir Directory for output PNGs.

Result

Like mProjWWTExec, this utility has a limitation: all the output files are put in a single directory. This may become unworkable if the tiles go deep enough. This shortcoming can be easily overcome but the details will depend on the details of the input data so we have opted for a simple initial approach.

Messages

OK

[struct stat="OK", level=level, nimage=count]
ERROR

Problem with FITS file.
ERROR

Cannot find histogram file [histfile].
ERROR

[dir] is not a directory.
ERROR

Problem creating output PNG directory.
ERROR

Problem with output PNG directory.
ERROR

mViewer error message

Examples

$ mPNGWWTExec -d 1 4 4 Planck fits gray.hist pngs

[struct stat="OK", level=4, nimage=341]

Releases

Unchanged in 4 releases since Debian 10 (Buster).

  1. 10–13

Bugs

The drizzle algorithm has been implemented but has not been tested in this release.

If a header template contains carriage returns (i.e., created/modified on a Windows machine), the cfitsio library will be unable to read it properly, resulting in the error: [struct stat="ERROR", status=207, msg="illegal character in keyword"]

It is best for the background correction algorithms if the area described in the header template completely encloses all of the input images in their entirety. If parts of input images are "chopped off" by the header template, the background correction will be affected. We recommend you use an expanded header for the reprojection and background modeling steps, returning to the originally desired header size for the final coaddition. The default background matching assumes that there are no non-linear background variations in the individual images (and therefore in the overlap differences). If there is any uncertainty in this regard, it is safer to turn on the "level only" background matching (the "-l" flag in mBgModel.

From montage 6.1+dfsg-1+b1 in Debian 13 (Trixie). Parsed by carta from the page's man source.