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LSST Data Management Base Package
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ExposureInfo.cc
Go to the documentation of this file.
1// -*- LSST-C++ -*- // fixed format comment for emacs
2/*
3 * This file is part of afw.
4 *
5 * Developed for the LSST Data Management System.
6 * This product includes software developed by the LSST Project
7 * (https://www.lsst.org).
8 * See the COPYRIGHT file at the top-level directory of this distribution
9 * for details of code ownership.
10 *
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <https://www.gnu.org/licenses/>.
23 */
24
25#include "lsst/pex/exceptions.h"
26#include "lsst/log/Log.h"
35#include "lsst/afw/fits.h"
36
37using namespace std::string_literals;
38
39namespace {
40LOG_LOGGER _log = LOG_GET("lsst.afw.image.ExposureInfo");
41
43} // namespace
44
45namespace lsst {
46namespace afw {
47namespace image {
48
49// Important: do *not* change the keys' strings; doing so will break compatibility with old FITS files
50
51typehandling::Key<std::string, std::shared_ptr<geom::SkyWcs const>> const ExposureInfo::KEY_WCS =
52 typehandling::makeKey<std::shared_ptr<geom::SkyWcs const>>("SKYWCS"s);
53
54bool ExposureInfo::hasWcs() const { return hasComponent(KEY_WCS); }
57
59 typehandling::makeKey<std::shared_ptr<detection::Psf const>>("PSF"s);
60
61bool ExposureInfo::hasPsf() const { return hasComponent(KEY_PSF); }
64
66 typehandling::makeKey<std::shared_ptr<PhotoCalib const>>("PHOTOCALIB"s);
67
75
77 typehandling::makeKey<std::shared_ptr<cameraGeom::Detector const>>("DETECTOR"s);
78
86
89 typehandling::makeKey<std::shared_ptr<geom::polygon::Polygon const>>("VALID_POLYGON"s);
90
98
100 typehandling::makeKey<std::shared_ptr<CoaddInputs const>>("COADD_INPUTS"s);
101
109
111 typehandling::makeKey<std::shared_ptr<ApCorrMap const>>("AP_CORR_MAP"s);
112
118
121 typehandling::makeKey<std::shared_ptr<TransmissionCurve const>>("TRANSMISSION_CURVE"s);
122
130
131bool ExposureInfo::hasId() const noexcept { return _exposureId.has_value(); }
132
134 if (_exposureId) {
135 return *_exposureId;
136 } else {
137 throw LSST_EXCEPT(lsst::pex::exceptions::NotFoundError, "Exposure does not have an ID.");
138 }
139}
140
141void ExposureInfo::setId(table::RecordId id) { _exposureId = id; }
142
143void ExposureInfo::clearId() noexcept { _exposureId.reset(); }
144
146 typehandling::makeKey<std::shared_ptr<FilterLabel const>>("FILTER"s);
150
152 // Version history:
153 // unversioned and 0: photometric calibration via Calib, WCS via SkyWcs using AST.
154 // 1: photometric calibration via PhotoCalib, generic components
155 // 2: remove Filter, replaced with (generic) FilterLabel
156 static int const version = 2;
157 return version;
158}
159
161 static std::string const versionName("EXPINFO_V");
162 return versionName;
163}
164
165// Clone various components; defined here so that we don't have to expose their insides in Exposure.h
166
168 if (apCorrMap) {
169 return std::make_shared<ApCorrMap>(*apCorrMap);
170 }
172}
173
176 std::shared_ptr<PhotoCalib const> const& photoCalib,
180 std::shared_ptr<CoaddInputs> const& coaddInputs,
184 : _exposureId(),
185 _metadata(metadata ? metadata
186 : std::shared_ptr<daf::base::PropertySet>(new daf::base::PropertyList())),
187 _visitInfo(visitInfo),
188 _components(std::make_unique<MapClass>()) {
189 setWcs(wcs);
190 setPsf(psf);
191 setPhotoCalib(photoCalib);
192 setDetector(detector);
193 setValidPolygon(polygon);
194 setCoaddInputs(coaddInputs);
195 setApCorrMap(_cloneApCorrMap(apCorrMap));
197}
198
200
201// Delegate to copy-constructor for backwards compatibility
203
204ExposureInfo::ExposureInfo(ExposureInfo const& other, bool copyMetadata)
205 : _exposureId(other._exposureId),
206 _metadata(other._metadata),
207 _visitInfo(other._visitInfo),
208 // ExposureInfos can (historically) share objects, but should each have their own pointers to them
209 _components(std::make_unique<MapClass>(*(other._components))) {
210 if (copyMetadata) _metadata = _metadata->deepCopy();
211}
212
214 if (&other != this) {
215 _exposureId = other._exposureId;
216 _metadata = other._metadata;
217 _visitInfo = other._visitInfo;
218 // ExposureInfos can (historically) share objects, but should each have their own pointers to them
219 _components = std::make_unique<MapClass>(*(other._components));
220 }
221 return *this;
222}
223// Delegate to copy-assignment for backwards compatibility
224ExposureInfo& ExposureInfo::operator=(ExposureInfo&& other) { return *this = other; }
225
227
228int ExposureInfo::_addToArchive(FitsWriteData& data, table::io::Persistable const& object, std::string key,
229 std::string comment) {
230 int componentId = data.archive.put(object);
231 data.metadata->set(key, componentId, comment);
232 return componentId;
233}
234
235int ExposureInfo::_addToArchive(FitsWriteData& data,
237 std::string comment) {
238 // Don't delegate to Persistable const& version because OutputArchive::put
239 // has special handling of shared_ptr
240 int componentId = data.archive.put(object);
241 data.metadata->set(key, componentId, comment);
242 return componentId;
243}
244
245// Standardized strings for _startWriteFits
246namespace {
247std::string _getOldHeaderKey(std::string mapKey) { return mapKey + "_ID"; }
248std::string _getNewHeaderKey(std::string mapKey) { return "ARCHIVE_ID_" + mapKey; }
249
250std::string _getHeaderComment(std::string mapKey) {
251 return "archive ID for generic component '" + mapKey + "'";
252}
253} // namespace
254
255ExposureInfo::FitsWriteData ExposureInfo::_startWriteFits(lsst::geom::Point2I const& xy0) const {
256 FitsWriteData data;
257
258 data.metadata.reset(new daf::base::PropertyList());
259 data.imageMetadata.reset(new daf::base::PropertyList());
260 data.maskMetadata = data.imageMetadata;
261 data.varianceMetadata = data.imageMetadata;
262
263 data.metadata->combine(*getMetadata());
264
266
267 // In the future, we might not have exactly three image HDUs, but we always do right now,
268 // so 0=primary, 1=image, 2=mask, 3=variance, 4+=archive
269 //
270 // Historically the AR_HDU keyword was 1-indexed (see RFC-304), and to maintain file compatibility
271 // this is still the case so we're setting AR_HDU to 5 == 4 + 1
272 //
273 data.metadata->set("AR_HDU", 5, "HDU (1-indexed) containing the archive used to store ancillary objects");
274 for (auto const& keyValue : *_components) {
275 std::string const& key = keyValue.first.getId();
276 std::shared_ptr<typehandling::Storable const> const& object = keyValue.second;
277
278 if (object && object->isPersistable()) {
279 std::string comment = _getHeaderComment(key);
280 // Store archive ID in two header keys:
281 // - old-style key for backwards compatibility,
282 // - and new-style key because it's much safer to parse
283 int id = _addToArchive(data, object, _getOldHeaderKey(key), comment);
284 data.metadata->set(_getNewHeaderKey(key), id, comment);
285 }
286 }
287
288 // LSST convention is that Wcs is in pixel coordinates (i.e relative to bottom left
289 // corner of parent image, if any). The Wcs/Fits convention is that the Wcs is in
290 // image coordinates. When saving an image we convert from pixel to index coordinates.
291 // In the case where this image is a parent image, the reference pixels are unchanged
292 // by this transformation
293 if (hasWcs() && getWcs()->isFits()) {
294 // Try to save the WCS as FITS-WCS metadata; if an exact representation
295 // is not possible then skip it
296 auto shift = lsst::geom::Extent2D(lsst::geom::Point2I(0, 0) - xy0);
297 auto newWcs = getWcs()->copyAtShiftedPixelOrigin(shift);
299 try {
300 wcsMetadata = newWcs->getFitsMetadata(true);
301 } catch (pex::exceptions::RuntimeError const&) {
302 // cannot represent this WCS as FITS-WCS; don't write its metadata
303 }
304 if (wcsMetadata) {
305 data.imageMetadata->combine(*newWcs->getFitsMetadata(true));
306 }
307 }
308
309 // For the sake of ds9, store _x0 and _y0 as -LTV1, -LTV2.
310 // This is in addition to saving _x0 and _y0 as WCS A, which is done elsewhere
311 // and is what LSST uses to read _x0 and _y0.
312 // LTV is a convention used by STScI (see \S2.6.2 of HST Data Handbook for STIS, version 5.0
313 // http://www.stsci.edu/hst/stis/documents/handbooks/currentDHB/ch2_stis_data7.html#429287)
314 // and recognized by ds9.
315 data.imageMetadata->set("LTV1", static_cast<double>(-xy0.getX()));
316 data.imageMetadata->set("LTV2", static_cast<double>(-xy0.getY()));
317
318 if (hasDetector()) {
319 data.metadata->set("DETNAME", getDetector()->getName());
320 data.metadata->set("DETSER", getDetector()->getSerial());
321 }
322
323 auto visitInfoPtr = getVisitInfo();
324 if (visitInfoPtr) {
325 detail::setVisitInfoMetadata(*(data.metadata), *visitInfoPtr);
326 }
327
328 if (hasId()) {
329 data.metadata->set("EXPID", getId());
330 }
331
332 return data;
333}
334
335void ExposureInfo::_finishWriteFits(fits::Fits& fitsfile, FitsWriteData const& data) const {
336 data.archive.writeFits(fitsfile);
337}
338
339} // namespace image
340} // namespace afw
341} // namespace lsst
char * data
Definition BaseRecord.cc:61
table::Key< int > id
Definition Detector.cc:162
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition Exception.h:48
LSST DM logging module built on log4cxx.
#define LOG_GET(logger)
Returns a Log object associated with logger.
Definition Log.h:75
#define LOG_LOGGER
Definition Log.h:714
Implementation of the Photometric Calibration class.
A collection of all the things that make an Exposure different from a MaskedImage.
bool hasWcs() const
Does this exposure have a Wcs?
static int getFitsSerializationVersion()
Get the version of FITS serialization that this ExposureInfo understands.
bool hasCoaddInputs() const
Does this exposure have coadd provenance catalogs?
static typehandling::Key< std::string, std::shared_ptr< geom::SkyWcs const > > const KEY_WCS
Standard key for looking up the Wcs.
ExposureInfo & operator=(ExposureInfo const &other)
Assignment; shares all components.
static typehandling::Key< std::string, std::shared_ptr< cameraGeom::Detector const > > const KEY_DETECTOR
Standard key for looking up the detector information.
bool hasTransmissionCurve() const
Does this exposure have a transmission curve?
bool hasPsf() const
Does this exposure have a Psf?
void setValidPolygon(std::shared_ptr< geom::polygon::Polygon const > polygon)
Set the exposure's valid Polygon.
bool hasPhotoCalib() const
Does this exposure have a photometric calibration?
bool hasApCorrMap() const
Return true if the exposure has an aperture correction map.
void setWcs(std::shared_ptr< geom::SkyWcs const > wcs)
Set the WCS of the exposure.
std::shared_ptr< PhotoCalib const > getPhotoCalib() const
Return the exposure's photometric calibration.
bool hasComponent(typehandling::Key< std::string, T > const &key) const
Test whether a generic component is defined.
std::shared_ptr< ApCorrMap const > getApCorrMap() const
Return the exposure's aperture correction map (null pointer if !hasApCorrMap())
void setApCorrMap(std::shared_ptr< ApCorrMap const > apCorrMap)
Set the exposure's aperture correction map (null pointer if !hasApCorrMap())
void setPhotoCalib(std::shared_ptr< PhotoCalib const > photoCalib)
Set the Exposure's PhotoCalib object.
static typehandling::Key< std::string, std::shared_ptr< geom::polygon::Polygon const > > const KEY_VALID_POLYGON
Standard key for looking up the valid polygon.
void setComponent(typehandling::Key< std::string, std::shared_ptr< T > > const &key, std::shared_ptr< T > const &object)
Add a generic component to the ExposureInfo.
bool hasValidPolygon() const
Does this exposure have a valid Polygon.
std::shared_ptr< geom::SkyWcs const > getWcs() const
Return the WCS of the exposure.
std::shared_ptr< T > getComponent(typehandling::Key< std::string, std::shared_ptr< T > > const &key) const
Retrieve a generic component from the ExposureInfo.
std::shared_ptr< FilterLabel const > getFilter() const
Return the exposure's filter information.
static typehandling::Key< std::string, std::shared_ptr< PhotoCalib const > > const KEY_PHOTO_CALIB
Standard key for looking up the photometric calibration.
void setCoaddInputs(std::shared_ptr< CoaddInputs const > coaddInputs)
Set the exposure's coadd provenance catalogs.
std::shared_ptr< cameraGeom::Detector const > getDetector() const
Return the exposure's Detector information.
void clearId() noexcept
Unset the exposure ID, if any.
void setDetector(std::shared_ptr< cameraGeom::Detector const > detector)
Set the exposure's Detector information.
void setFilter(std::shared_ptr< FilterLabel const > filter)
Set the exposure's filter information.
void setPsf(std::shared_ptr< detection::Psf const > psf)
Set the exposure's point-spread function.
static typehandling::Key< std::string, std::shared_ptr< TransmissionCurve const > > const KEY_TRANSMISSION_CURVE
Standard key for looking up the transmission curve.
static typehandling::Key< std::string, std::shared_ptr< CoaddInputs const > > const KEY_COADD_INPUTS
Standard key for looking up coadd provenance catalogs.
static typehandling::Key< std::string, std::shared_ptr< detection::Psf const > > const KEY_PSF
Standard key for looking up the point-spread function.
std::shared_ptr< CoaddInputs const > getCoaddInputs() const
Return a pair of catalogs that record the inputs, if this Exposure is a coadd (otherwise null).
bool hasFilter() const
Does this exposure have filter information?
table::RecordId getId() const
Return the exposure ID.
std::shared_ptr< geom::polygon::Polygon const > getValidPolygon() const
Return the valid Polygon.
std::shared_ptr< daf::base::PropertySet > getMetadata() const
Return flexible metadata.
ExposureInfo(std::shared_ptr< geom::SkyWcs const > const &wcs=std::shared_ptr< geom::SkyWcs const >(), std::shared_ptr< detection::Psf const > const &psf=std::shared_ptr< detection::Psf const >(), std::shared_ptr< PhotoCalib const > const &photoCalib=std::shared_ptr< PhotoCalib const >(), std::shared_ptr< cameraGeom::Detector const > const &detector=std::shared_ptr< cameraGeom::Detector const >(), std::shared_ptr< geom::polygon::Polygon const > const &polygon=std::shared_ptr< geom::polygon::Polygon const >(), std::shared_ptr< daf::base::PropertySet > const &metadata=std::shared_ptr< daf::base::PropertySet >(), std::shared_ptr< CoaddInputs > const &coaddInputs=std::shared_ptr< CoaddInputs >(), std::shared_ptr< ApCorrMap > const &apCorrMap=std::shared_ptr< ApCorrMap >(), std::shared_ptr< image::VisitInfo const > const &visitInfo=std::shared_ptr< image::VisitInfo const >(), std::shared_ptr< TransmissionCurve const > const &transmissionCurve=std::shared_ptr< TransmissionCurve >())
Construct an ExposureInfo from its various components.
bool hasDetector() const
Does this exposure have Detector information?
static typehandling::Key< std::string, std::shared_ptr< ApCorrMap const > > const KEY_AP_CORR_MAP
Standard key for looking up the aperture correction map.
static std::string const & getFitsSerializationVersionName()
Get the version of FITS serialization version info name.
std::shared_ptr< image::VisitInfo const > getVisitInfo() const
Return the exposure's visit info.
static typehandling::Key< std::string, std::shared_ptr< FilterLabel const > > const KEY_FILTER
Standard key for looking up filter information.
void setId(table::RecordId id)
Set the exposure ID.
bool hasId() const noexcept
Does this Exposure have an exposure id?
void setTransmissionCurve(std::shared_ptr< TransmissionCurve const > tc)
Set the exposure's transmission curve.
std::shared_ptr< detection::Psf const > getPsf() const
Return the exposure's point-spread function.
std::shared_ptr< TransmissionCurve const > getTransmissionCurve() const
Return the exposure's transmission curve.
A map of Storable supporting strongly-typed access.
Definition StorableMap.h:59
A base class for objects that can be persisted via afw::table::io Archive classes.
Definition Persistable.h:74
Key for type-safe lookup in a GenericMap.
Definition Key.h:52
Reports attempts to access elements using an invalid key.
Definition Runtime.h:151
void setVisitInfoMetadata(daf::base::PropertyList &metadata, VisitInfo const &visitInfo)
Set FITS metadata from a VisitInfo.
Definition VisitInfo.cc:408
Extent< double, 2 > Extent2D
Definition Extent.h:400
STL namespace.
Key< int > visitInfo
Definition Exposure.cc:70
Key< int > transmissionCurve
Definition Exposure.cc:71
Key< int > apCorrMap
Definition Exposure.cc:68