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LSST Data Management Base Package
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Observatory.h
Go to the documentation of this file.
1// -*- lsst-c++ -*-
2
3/*
4 * LSST Data Management System
5 * Copyright 2008-2016 LSST Corporation.
6 *
7 * This product includes software developed by the
8 * LSST Project (http://www.lsst.org/).
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the LSST License Statement and
21 * the GNU General Public License along with this program. If not,
22 * see <http://www.lsstcorp.org/LegalNotices/>.
23 */
24
25#if !defined(LSST_AFW_COORD_OBSERVATORY_H)
26#define LSST_AFW_COORD_OBSERVATORY_H
27/*
28 * Class to hold observatory/telescope location
29 */
30
31#include <iostream>
32
34#include "lsst/geom/Angle.h"
35
36namespace lsst {
37namespace afw {
38namespace coord {
39
43class Observatory final {
44public:
52 Observatory(lsst::geom::Angle const longitude, lsst::geom::Angle const latitude, double const elevation);
53
62 Observatory(std::string const& longitude, std::string const& latitude, double const elevation);
63
64 ~Observatory() noexcept;
65 Observatory(Observatory const&) noexcept;
67 Observatory& operator=(Observatory const&) noexcept;
68 Observatory& operator=(Observatory&&) noexcept;
69
71 void setLongitude(lsst::geom::Angle const longitude);
73 void setLatitude(lsst::geom::Angle const latitude);
75 void setElevation(double const elevation);
76
78 lsst::geom::Angle getLongitude() const noexcept;
80 lsst::geom::Angle getLatitude() const noexcept;
82 double getElevation() const noexcept { return _elevation; }
83
85 std::string toString() const;
86
87 bool operator==(Observatory const& rhs) const noexcept {
88 // Observatory may be initialized to NaN values as a placeholder, or to indicate "unknown".
89 auto deltaLongitude = std::isnan(_latitude.asRadians()) && std::isnan(rhs._latitude.asRadians())
91 : (_latitude - rhs._latitude).wrapCtr();
92 auto deltaLatitude = std::isnan(_longitude.asRadians()) && std::isnan(rhs._longitude.asRadians())
94 : (_longitude - rhs._longitude).wrapCtr();
95 return (deltaLongitude == 0.0 * lsst::geom::degrees) &&
96 (deltaLatitude == 0.0 * lsst::geom::degrees) &&
97 ((std::isnan(_elevation) && std::isnan(rhs._elevation)) ||
98 (_elevation - rhs._elevation) == 0.0);
99 }
100 bool operator!=(Observatory const& rhs) const noexcept { return !(*this == rhs); }
101
103 std::size_t hash_value() const noexcept {
104 // Completely arbitrary seed
105 return cpputils::hashCombine(17, _latitude.wrapCtr(), _longitude.wrapCtr(), _elevation);
106 }
107
108private:
109 lsst::geom::Angle _latitude;
110 lsst::geom::Angle _longitude;
111 double _elevation;
112};
113
120std::ostream& operator<<(std::ostream& os, Observatory const& obs);
121} // namespace coord
122} // namespace afw
123} // namespace lsst
124
125namespace std {
126template <>
127struct hash<lsst::afw::coord::Observatory> {
130 size_t operator()(argument_type const& obj) const noexcept { return obj.hash_value(); }
131};
132} // namespace std
133
134#endif
Hold the location of an observatory.
Definition Observatory.h:43
void setLatitude(lsst::geom::Angle const latitude)
set telescope latitude (positive values are E of Greenwich)
std::string toString() const
get string representation
double getElevation() const noexcept
get telescope elevation (meters above reference spheroid)
Definition Observatory.h:82
std::size_t hash_value() const noexcept
Return a hash of this object.
Observatory(std::string const &longitude, std::string const &latitude, double const elevation)
Construct an Observatory with longitude and latitude specified as sexagesimal strings.
void setElevation(double const elevation)
set telescope elevation (meters above reference spheroid)
bool operator!=(Observatory const &rhs) const noexcept
void setLongitude(lsst::geom::Angle const longitude)
set telescope longitude
bool operator==(Observatory const &rhs) const noexcept
Definition Observatory.h:87
lsst::geom::Angle getLatitude() const noexcept
get telescope latitude
Observatory(lsst::geom::Angle const longitude, lsst::geom::Angle const latitude, double const elevation)
Construct an Observatory with longitude and latitude specified as lsst::geom::Angle.
lsst::geom::Angle getLongitude() const noexcept
get telescope longitude (positive values are E of Greenwich)
A class representing an angle.
Definition Angle.h:128
T isnan(T... args)
std::ostream & operator<<(std::ostream &os, Observatory const &obs)
Print an Observatory to the stream.
std::size_t hashCombine(std::size_t seed) noexcept
Combine hashes.
Definition hashCombine.h:35
AngleUnit constexpr degrees
constant with units of degrees
Definition Angle.h:110
STL namespace.
size_t operator()(argument_type const &obj) const noexcept
lsst::afw::coord::Observatory argument_type