NAME Astro::SkyPlot - Create very basic sky plots SYNOPSIS use Astro::SkyPlot qw/:all/; # export the markers my $plot = Astro::SkyPlot->new(); # use defaults (see below) # specify options yourself: $plot = Astro::SkyPlot->new( xsize => 200, # mm ysize => 200, bgcolor => [0, 0, 0], # RGB => black projection => 'hammer', axiscolor => [100, 100, 100], # RGB => grey ); $plot->setcolor(255, 0, 0); # RGB => red $plot->plot_lat_long(1, 1); # units: radians $plot->plot_lat_long(1, 1, size => 0.2, marker => MARK_CIRCLE); # units: radians, radians, mm $plot->write(file => "skyplot.eps"); DESCRIPTION A module to create very basic sky plots as EPS documents. MARKERS There are multiple types of markers that can be plotted into the sky plot. These are defined through constants that can be exported from the module: MARK_CIRCLE => circular markers MARK_CIRCLE_FILLED => filled circular markers MARK_BOX => square markers MARK_BOX_FILLED => filled square markers MARK_TRIANGLE => triangularmarkers MARK_TRIANGLE_FILLED => filled triangular markers MARK_DTRIANGLE => downward triangular markers MARK_DTRIANGLE_FILLED => filled downward triangular markers MARK_CROSS => cross shaped markers MARK_DIAGCROSS => diagonal cross shaped markers METHODS new Constructor. Without arguments, uses the default settings (cf. SYNOPSIS). Supports the following options: xsize => Plot x-size in mm (def: 200mm) ysize => Plot y-size in mm (def: 200mm) bgcolor => Background color as array reference (RGB value 0-255 per component) (def: black, [0, 0, 0]) projection => Projection type. Default: Hammer projection ('hammer') axiscolor => Color for the axes. (def: grey, [100, 100, 100]) setcolor Set a new drawing color. Takes three numbers corresponding to red, green and blue values between 0 and 255. plot_lat_long Draw a new latitude/longitude point. These may be followed by key/value pairs of options. Supported options: "size": the size (radius) of the point (default: 0.1mm) "marker": The type of marker to use (see "MARKERS"). write Write the plot to the specified EPS file. ACCESSOR METHODS The following are read only accessors unless otherwise noted. marker Get/Set the default marker type. The marker type for a single plot operation can be specified as an option to "plot_lat_long". ps Returns the internals "PostScript::Simple" object. xsize Returns the image's width (in mm). ysize Returns the image's height (in mm). PRIVATE METHODS _draw_bg Draws the plot's background. _restore_color Restores the previously saved color. _plot_axis Plot the sky-plot axis. _project Projects given lat/long to x/y to plot coordinates. _draw_marker Draws a marker at the given plot coordinates. Arguments "$x, $y, $markerno, $size". SEE ALSO For more general information on map projections: Map projections are implemented in Astro::MapProjection AUTHOR Steffen Mueller, COPYRIGHT AND LICENSE Copyright (C) 2009 by Steffen Mueller This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.0 or, at your option, any later version of Perl 5 you may have available.