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package Astro::Catalog::Query::USNOA2;

=head1 NAME

Astro::Catalog::Query::USNOA2 - A query request to the USNO-A2.0 Catalog

=head1 SYNOPSIS

    $usno = new Astro::Catalog::Query::USNOA2(
            Coords    => new Astro::Coords(),
            Radius    => $radius,
            Bright    => $magbright,
            Faint     => $magfaint,
            Sort      => $sort_type,
            Number    => $number_out);

    my $catalog = $usno->querydb();

=head1 DESCRIPTION

The module is an object orientated interface to the online USNO-A2.0
catalog at the ESO/ST-ECF archive site.

Stores information about an prospective USNO-A2.0 query and allows the query to
be made, returning an Astro::Catalog::USNOA2::Catalog object.

The object will by default pick up the proxy information from the HTTP_PROXY
and NO_PROXY environment variables, see the LWP::UserAgent documentation for
details.

See L<Astro::Catalog::BaseQuery> for the catalog-independent methods.

=cut

use strict;
use warnings;
use base qw/Astro::Catalog::Transport::REST/;

use File::Spec;
use Carp;

use Astro::Coords;
use Astro::Catalog;
use Astro::Catalog::Item;

use Astro::Flux;
use Astro::Fluxes;
use Astro::FluxColor;
use Number::Uncertainty;

our $VERSION = '4.38';

=begin __PRIVATE_METHODS__

=head2 Private methods

These methods are for internal use only.

=over 4

=item B<_default_remote_host>

=cut

sub _default_remote_host {
    return "archive.eso.org";
}

=item B<_default_url_path>

=cut

sub _default_url_path {
    return "skycat/servers/usnoa_res?";
}

=item B<_get_allowed_options>

Returns a hash with keys, being the internal options supported
by this subclass, and values being the key name actually required
by the remote system (and to be included in the query).

=cut

sub _get_allowed_options {
    my $self = shift;
    return (