healpy.visufunc.gnomview(map=None, fig=None, rot=None, coord=None, unit='', xsize=200, ysize=None, reso=1.5, title='Gnomonic view', nest=False, remove_dip=False, remove_mono=False, gal_cut=0, min=None, max=None, flip='astro', format='%.3g', cbar=True, cmap=None, norm=None, hold=False, sub=None, margins=None, notext=False, return_projected_map=False)

Plot an healpix map (given as an array) in Gnomonic projection.


map : array-like

The map to project, supports masked maps, see the ma function. If None, use a blank map, useful for overplotting.

fig : None or int, optional

A figure number. Default: None= create a new figure

rot : scalar or sequence, optional

Describe the rotation to apply. In the form (lon, lat, psi) (unit: degrees) : the point at longitude lon and latitude lat will be at the center. An additional rotation of angle psi around this direction is applied.

coord : sequence of character, optional

Either one of ‘G’, ‘E’ or ‘C’ to describe the coordinate system of the map, or a sequence of 2 of these to rotate the map from the first to the second coordinate system.

unit : str, optional

A text describing the unit of the data. Default: ‘’

xsize : int, optional

The size of the image. Default: 200

ysize : None or int, optional

The size of the image. Default: None= xsize

reso : float, optional

Resolution (in arcmin). Default: 1.5 arcmin

title : str, optional

The title of the plot. Default: ‘Gnomonic view’

nest : bool, optional

If True, ordering scheme is NESTED. Default: False (RING)

min : float, scalar, optional

The minimum range value

max : float, scalar, optional

The maximum range value

flip : {‘astro’, ‘geo’}, optional

Defines the convention of projection : ‘astro’ (default, east towards left, west towards right) or ‘geo’ (east towards roght, west towards left)

remove_dip : bool, optional

If True, remove the dipole+monopole

remove_mono : bool, optional

If True, remove the monopole

gal_cut : float, scalar, optional

Symmetric galactic cut for the dipole/monopole fit. Removes points in latitude range [-gal_cut, +gal_cut]

format : str, optional

The format of the scale label. Default: ‘%g’

hold : bool, optional

If True, replace the current Axes by a MollweideAxes. use this if you want to have multiple maps on the same figure. Default: False

sub : int or sequence, optional

Use only a zone of the current figure (same syntax as subplot). Default: None

margins : None or sequence, optional

Either None, or a sequence (left,bottom,right,top) giving the margins on left,bottom,right and top of the axes. Values are relative to figure (0-1). Default: None

notext: bool, optional

If True: do not add resolution info text. Default=False

return_projected_map : bool

if True returns the projected map in a 2d numpy array

See also

mollview, cartview, orthview, azeqview