This IDL facility provides a means to visualise a full sky or half sky orthographic projection (projection onto a tangent plane from a point located at infinity) of HEALPix and COBE Quad-Cube maps in an IDL environment. It also offers the possibility to generate GIF, PNG and Postscript color-coded images of the projected map. The projected (but not color-coded) data can also be output in FITS files and IDL arrays.

Location in HEALPix directory tree: src/idl/visu/orthview.pro

FORMAT

IDL> ORTHVIEW, File, [ Select, ] [ /ASINH, CHARSIZE=, CHARTHICK=, COLT=, COORD=, /CROP, EXECUTE=, FACTOR=, FITS=, /FLIP, GAL_CUT=, GIF=, GLSIZE=, GRATICULE=, /HALF_SKY, HBOUND=, /HELP, /HIST_EQUAL, HXSIZE=, IGLSIZE=, IGRATICULE=, /LOG, MAP_OUT=, MAX=, MIN=, /NESTED, /NO_DIPOLE, /NO_MONOPOLE, /NOBAR, /NOLABELS, /NOPOSITION, OFFSET=, OUTLINE=, PNG=, POLARIZATION=, /PREVIEW, PS=, PXSIZE=, PYSIZE=, RESO_ARCMIN=, RETAIN=, ROT=, /SAVE, /SHADED, /SILENT, SUBTITLE=, TITLEPLOT=, TRANSPARENT=, TRUECOLORS=, UNITS=, WINDOW=, XPOS=, YPOS=]

QUALIFIERS

: For a full list of qualifiers see mollview

KEYWORDS

: For a full list of keywords see mollview

DESCRIPTION

orthview reads in a HEALPix sky map in FITS format and generates an orthographic projection of it, that can be visualized on the screen or exported in a GIF, PNG, Postscript or FITS file. orthview allows the selection of the coordinate system, point of projection, map size, color table, color bar inclusion, linear or log scaling, histogram equalised color scaling, maximum and minimum range for the plot, plot-title etc. It also allows the representation of the polarization field.

RELATED ROUTINES

This section lists the routines related to orthview

: see mollview

EXAMPLE:

map = findgen(48)

triangle= create_struct('coord','G','ra',[0,80,0],'dec',[40,45,65])

orthview,map,/online,graticule=[45,30],rot=[10,20,30],$

$\quad$ title='Orthographic projection',subtitle='orthview' $

$\quad$ outline=triangle

makes an orthographic projection of map (see Figure 1d on page ) after an arbitrary rotation, with a graticule grid (with a 45^o step in longitude and 30^o in latitude) and an arbitrary triangular outline

Eric Hivon 2010-06-18

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