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ogrspatialreference.cpp
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/******************************************************************************
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: The OGRSpatialReference class.
* Author: Frank Warmerdam, [email protected]
*
******************************************************************************
* Copyright (c) 1999, Les Technologies SoftMap Inc.
* Copyright (c) 2008-2018, Even Rouault <even.rouault at spatialys.com>
*
* SPDX-License-Identifier: MIT
****************************************************************************/
#include "cpl_port.h"
#include "ogr_spatialref.h"
#include <cmath>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <limits>
#include <string>
#include <mutex>
#include <set>
#include <vector>
#include "cpl_atomic_ops.h"
#include "cpl_conv.h"
#include "cpl_csv.h"
#include "cpl_error.h"
#include "cpl_error_internal.h"
#include "cpl_http.h"
#include "cpl_json.h"
#include "cpl_multiproc.h"
#include "cpl_string.h"
#include "cpl_vsi.h"
#include "ogr_core.h"
#include "ogr_p.h"
#include "ogr_proj_p.h"
#include "ogr_srs_api.h"
#include "ogrmitabspatialref.h"
#include "proj.h"
#include "proj_experimental.h"
#include "proj_constants.h"
// Exists since 8.0.1
#ifndef PROJ_AT_LEAST_VERSION
#define PROJ_COMPUTE_VERSION(maj, min, patch) \
((maj)*10000 + (min)*100 + (patch))
#define PROJ_VERSION_NUMBER \
PROJ_COMPUTE_VERSION(PROJ_VERSION_MAJOR, PROJ_VERSION_MINOR, \
PROJ_VERSION_PATCH)
#define PROJ_AT_LEAST_VERSION(maj, min, patch) \
(PROJ_VERSION_NUMBER >= PROJ_COMPUTE_VERSION(maj, min, patch))
#endif
#define STRINGIFY(s) #s
#define XSTRINGIFY(s) STRINGIFY(s)
struct OGRSpatialReference::Private
{
struct Listener : public OGR_SRSNode::Listener
{
OGRSpatialReference::Private *m_poObj = nullptr;
explicit Listener(OGRSpatialReference::Private *poObj) : m_poObj(poObj)
{
}
Listener(const Listener &) = delete;
Listener &operator=(const Listener &) = delete;
void notifyChange(OGR_SRSNode *) override
{
m_poObj->nodesChanged();
}
};
OGRSpatialReference *m_poSelf = nullptr;
PJ *m_pj_crs = nullptr;
// Temporary state used for object construction
PJ_TYPE m_pjType = PJ_TYPE_UNKNOWN;
CPLString m_osPrimeMeridianName{};
CPLString m_osAngularUnits{};
CPLString m_osLinearUnits{};
CPLString m_osAxisName[3]{};
std::vector<std::string> m_wktImportWarnings{};
std::vector<std::string> m_wktImportErrors{};
CPLString m_osAreaName{};
bool m_bIsThreadSafe = false;
bool m_bNodesChanged = false;
bool m_bNodesWKT2 = false;
OGR_SRSNode *m_poRoot = nullptr;
double dfFromGreenwich = 0.0;
double dfToMeter = 0.0;
double dfToDegrees = 0.0;
double m_dfAngularUnitToRadian = 0.0;
int nRefCount = 1;
int bNormInfoSet = FALSE;
PJ *m_pj_geod_base_crs_temp = nullptr;
PJ *m_pj_proj_crs_cs_temp = nullptr;
bool m_pj_crs_modified_during_demote = false;
PJ *m_pj_bound_crs_target = nullptr;
PJ *m_pj_bound_crs_co = nullptr;
PJ *m_pj_crs_backup = nullptr;
OGR_SRSNode *m_poRootBackup = nullptr;
bool m_bMorphToESRI = false;
bool m_bHasCenterLong = false;
std::shared_ptr<Listener> m_poListener{};
std::recursive_mutex m_mutex{};
OSRAxisMappingStrategy m_axisMappingStrategy = OAMS_AUTHORITY_COMPLIANT;
std::vector<int> m_axisMapping{1, 2, 3};
double m_coordinateEpoch = 0; // as decimal year
explicit Private(OGRSpatialReference *poSelf);
~Private();
Private(const Private &) = delete;
Private &operator=(const Private &) = delete;
void SetThreadSafe()
{
m_bIsThreadSafe = true;
}
void clear();
void setPjCRS(PJ *pj_crsIn, bool doRefreshAxisMapping = true);
void setRoot(OGR_SRSNode *poRoot);
void refreshProjObj();
void nodesChanged();
void refreshRootFromProjObj();
void invalidateNodes();
void setMorphToESRI(bool b);
PJ *getGeodBaseCRS();
PJ *getProjCRSCoordSys();
const char *getProjCRSName();
OGRErr replaceConversionAndUnref(PJ *conv);
void demoteFromBoundCRS();
void undoDemoteFromBoundCRS();
PJ_CONTEXT *getPROJContext()
{
return OSRGetProjTLSContext();
}
const char *nullifyTargetKeyIfPossible(const char *pszTargetKey);
void refreshAxisMapping();
// This structures enables locking during calls to OGRSpatialReference
// public methods. Locking is only needed for instances of
// OGRSpatialReference that have been asked to be thread-safe at
// construction.
// The lock is not just for a single call to OGRSpatialReference::Private,
// but for the series of calls done by a OGRSpatialReference method.
// We need a recursive mutex, because some OGRSpatialReference methods
// may call other ones.
struct OptionalLockGuard
{
Private &m_private;
explicit OptionalLockGuard(Private *p) : m_private(*p)
{
if (m_private.m_bIsThreadSafe)
m_private.m_mutex.lock();
}
~OptionalLockGuard()
{
if (m_private.m_bIsThreadSafe)
m_private.m_mutex.unlock();
}
};
inline OptionalLockGuard GetOptionalLockGuard()
{
return OptionalLockGuard(this);
}
};
#define TAKE_OPTIONAL_LOCK() \
auto lock = d->GetOptionalLockGuard(); \
CPL_IGNORE_RET_VAL(lock)
static OSRAxisMappingStrategy GetDefaultAxisMappingStrategy()
{
const char *pszDefaultAMS =
CPLGetConfigOption("OSR_DEFAULT_AXIS_MAPPING_STRATEGY", nullptr);
if (pszDefaultAMS)
{
if (EQUAL(pszDefaultAMS, "AUTHORITY_COMPLIANT"))
return OAMS_AUTHORITY_COMPLIANT;
else if (EQUAL(pszDefaultAMS, "TRADITIONAL_GIS_ORDER"))
return OAMS_TRADITIONAL_GIS_ORDER;
else
{
CPLError(CE_Failure, CPLE_AppDefined,
"Illegal value for OSR_DEFAULT_AXIS_MAPPING_STRATEGY = %s",
pszDefaultAMS);
}
}
return OAMS_AUTHORITY_COMPLIANT;
}
OGRSpatialReference::Private::Private(OGRSpatialReference *poSelf)
: m_poSelf(poSelf),
m_poListener(std::shared_ptr<Listener>(new Listener(this)))
{
// Get the default value for m_axisMappingStrategy from the
// OSR_DEFAULT_AXIS_MAPPING_STRATEGY configuration option, if set.
m_axisMappingStrategy = GetDefaultAxisMappingStrategy();
}
OGRSpatialReference::Private::~Private()
{
// In case we destroy the object not in the thread that created it,
// we need to reassign the PROJ context. Having the context bundled inside
// PJ* deeply sucks...
auto ctxt = getPROJContext();
proj_assign_context(m_pj_crs, ctxt);
proj_destroy(m_pj_crs);
proj_assign_context(m_pj_geod_base_crs_temp, ctxt);
proj_destroy(m_pj_geod_base_crs_temp);
proj_assign_context(m_pj_proj_crs_cs_temp, ctxt);
proj_destroy(m_pj_proj_crs_cs_temp);
proj_assign_context(m_pj_bound_crs_target, ctxt);
proj_destroy(m_pj_bound_crs_target);
proj_assign_context(m_pj_bound_crs_co, ctxt);
proj_destroy(m_pj_bound_crs_co);
proj_assign_context(m_pj_crs_backup, ctxt);
proj_destroy(m_pj_crs_backup);
delete m_poRootBackup;
delete m_poRoot;
}
void OGRSpatialReference::Private::clear()
{
proj_assign_context(m_pj_crs, getPROJContext());
proj_destroy(m_pj_crs);
m_pj_crs = nullptr;
delete m_poRoot;
m_poRoot = nullptr;
m_bNodesChanged = false;
m_wktImportWarnings.clear();
m_wktImportErrors.clear();
m_pj_crs_modified_during_demote = false;
m_pjType = PJ_TYPE_UNKNOWN;
m_osPrimeMeridianName.clear();
m_osAngularUnits.clear();
m_osLinearUnits.clear();
bNormInfoSet = FALSE;
dfFromGreenwich = 1.0;
dfToMeter = 1.0;
dfToDegrees = 1.0;
m_dfAngularUnitToRadian = 0.0;
m_bMorphToESRI = false;
m_bHasCenterLong = false;
m_coordinateEpoch = 0.0;
}
void OGRSpatialReference::Private::setRoot(OGR_SRSNode *poRoot)
{
m_poRoot = poRoot;
if (m_poRoot)
{
m_poRoot->RegisterListener(m_poListener);
}
nodesChanged();
}
void OGRSpatialReference::Private::setPjCRS(PJ *pj_crsIn,
bool doRefreshAxisMapping)
{
auto ctxt = getPROJContext();
#if PROJ_AT_LEAST_VERSION(9, 2, 0)
if (proj_get_type(pj_crsIn) == PJ_TYPE_COORDINATE_METADATA)
{
const double dfEpoch =
proj_coordinate_metadata_get_epoch(ctxt, pj_crsIn);
if (!std::isnan(dfEpoch))
{
m_poSelf->SetCoordinateEpoch(dfEpoch);
}
auto crs = proj_get_source_crs(ctxt, pj_crsIn);
proj_destroy(pj_crsIn);
pj_crsIn = crs;
}
#endif
proj_assign_context(m_pj_crs, ctxt);
proj_destroy(m_pj_crs);
m_pj_crs = pj_crsIn;
if (m_pj_crs)
{
m_pjType = proj_get_type(m_pj_crs);
}
if (m_pj_crs_backup)
{
m_pj_crs_modified_during_demote = true;
}
invalidateNodes();
if (doRefreshAxisMapping)
{
refreshAxisMapping();
}
}
void OGRSpatialReference::Private::refreshProjObj()
{
if (m_bNodesChanged && m_poRoot)
{
char *pszWKT = nullptr;
m_poRoot->exportToWkt(&pszWKT);
auto poRootBackup = m_poRoot;
m_poRoot = nullptr;
const double dfCoordinateEpochBackup = m_coordinateEpoch;
clear();
m_coordinateEpoch = dfCoordinateEpochBackup;
m_bHasCenterLong = strstr(pszWKT, "CENTER_LONG") != nullptr;
const char *const options[] = {
"STRICT=NO",
#if PROJ_AT_LEAST_VERSION(9, 1, 0)
"UNSET_IDENTIFIERS_IF_INCOMPATIBLE_DEF=NO",
#endif
nullptr
};
PROJ_STRING_LIST warnings = nullptr;
PROJ_STRING_LIST errors = nullptr;
setPjCRS(proj_create_from_wkt(getPROJContext(), pszWKT, options,
&warnings, &errors));
for (auto iter = warnings; iter && *iter; ++iter)
{
m_wktImportWarnings.push_back(*iter);
}
for (auto iter = errors; iter && *iter; ++iter)
{
m_wktImportErrors.push_back(*iter);
}
proj_string_list_destroy(warnings);
proj_string_list_destroy(errors);
CPLFree(pszWKT);
m_poRoot = poRootBackup;
m_bNodesChanged = false;
}
}
void OGRSpatialReference::Private::refreshRootFromProjObj()
{
CPLAssert(m_poRoot == nullptr);
if (m_pj_crs)
{
CPLStringList aosOptions;
if (!m_bMorphToESRI)
{
aosOptions.SetNameValue("OUTPUT_AXIS", "YES");
aosOptions.SetNameValue("MULTILINE", "NO");
}
aosOptions.SetNameValue("STRICT", "NO");
const char *pszWKT;
{
CPLErrorStateBackuper oErrorStateBackuper(CPLQuietErrorHandler);
pszWKT = proj_as_wkt(getPROJContext(), m_pj_crs,
m_bMorphToESRI ? PJ_WKT1_ESRI : PJ_WKT1_GDAL,
aosOptions.List());
m_bNodesWKT2 = false;
}
if (!m_bMorphToESRI && pszWKT == nullptr)
{
pszWKT = proj_as_wkt(getPROJContext(), m_pj_crs, PJ_WKT2_2018,
aosOptions.List());
m_bNodesWKT2 = true;
}
if (pszWKT)
{
auto root = new OGR_SRSNode();
setRoot(root);
root->importFromWkt(&pszWKT);
m_bNodesChanged = false;
}
}
}
static bool isNorthEastAxisOrder(PJ_CONTEXT *ctx, PJ *cs)
{
const char *pszName1 = nullptr;
const char *pszDirection1 = nullptr;
proj_cs_get_axis_info(ctx, cs, 0, &pszName1, nullptr, &pszDirection1,
nullptr, nullptr, nullptr, nullptr);
const char *pszName2 = nullptr;
const char *pszDirection2 = nullptr;
proj_cs_get_axis_info(ctx, cs, 1, &pszName2, nullptr, &pszDirection2,
nullptr, nullptr, nullptr, nullptr);
if (pszDirection1 && EQUAL(pszDirection1, "north") && pszDirection2 &&
EQUAL(pszDirection2, "east"))
{
return true;
}
if (pszDirection1 && pszDirection2 &&
((EQUAL(pszDirection1, "north") && EQUAL(pszDirection2, "north")) ||
(EQUAL(pszDirection1, "south") && EQUAL(pszDirection2, "south"))) &&
pszName1 && STARTS_WITH_CI(pszName1, "northing") && pszName2 &&
STARTS_WITH_CI(pszName2, "easting"))
{
return true;
}
return false;
}
void OGRSpatialReference::Private::refreshAxisMapping()
{
if (!m_pj_crs || m_axisMappingStrategy == OAMS_CUSTOM)
return;
bool doUndoDemote = false;
if (m_pj_crs_backup == nullptr)
{
doUndoDemote = true;
demoteFromBoundCRS();
}
const auto ctxt = getPROJContext();
PJ *horizCRS = nullptr;
int axisCount = 0;
if (m_pjType == PJ_TYPE_VERTICAL_CRS)
{
axisCount = 1;
}
else if (m_pjType == PJ_TYPE_COMPOUND_CRS)
{
horizCRS = proj_crs_get_sub_crs(ctxt, m_pj_crs, 0);
if (horizCRS && proj_get_type(horizCRS) == PJ_TYPE_BOUND_CRS)
{
auto baseCRS = proj_get_source_crs(ctxt, horizCRS);
if (baseCRS)
{
proj_destroy(horizCRS);
horizCRS = baseCRS;
}
}
auto vertCRS = proj_crs_get_sub_crs(ctxt, m_pj_crs, 1);
if (vertCRS)
{
if (proj_get_type(vertCRS) == PJ_TYPE_BOUND_CRS)
{
auto baseCRS = proj_get_source_crs(ctxt, vertCRS);
if (baseCRS)
{
proj_destroy(vertCRS);
vertCRS = baseCRS;
}
}
auto cs = proj_crs_get_coordinate_system(ctxt, vertCRS);
if (cs)
{
axisCount += proj_cs_get_axis_count(ctxt, cs);
proj_destroy(cs);
}
proj_destroy(vertCRS);
}
}
else
{
horizCRS = m_pj_crs;
}
bool bSwitchForGisFriendlyOrder = false;
if (horizCRS)
{
auto cs = proj_crs_get_coordinate_system(ctxt, horizCRS);
if (cs)
{
int nHorizCSAxisCount = proj_cs_get_axis_count(ctxt, cs);
axisCount += nHorizCSAxisCount;
if (nHorizCSAxisCount >= 2)
{
bSwitchForGisFriendlyOrder = isNorthEastAxisOrder(ctxt, cs);
}
proj_destroy(cs);
}
}
if (horizCRS != m_pj_crs)
{
proj_destroy(horizCRS);
}
if (doUndoDemote)
{
undoDemoteFromBoundCRS();
}
m_axisMapping.resize(axisCount);
if (m_axisMappingStrategy == OAMS_AUTHORITY_COMPLIANT ||
!bSwitchForGisFriendlyOrder)
{
for (int i = 0; i < axisCount; i++)
{
m_axisMapping[i] = i + 1;
}
}
else
{
m_axisMapping[0] = 2;
m_axisMapping[1] = 1;
if (axisCount == 3)
{
m_axisMapping[2] = 3;
}
}
}
void OGRSpatialReference::Private::nodesChanged()
{
m_bNodesChanged = true;
}
void OGRSpatialReference::Private::invalidateNodes()
{
delete m_poRoot;
m_poRoot = nullptr;
m_bNodesChanged = false;
}
void OGRSpatialReference::Private::setMorphToESRI(bool b)
{
invalidateNodes();
m_bMorphToESRI = b;
}
void OGRSpatialReference::Private::demoteFromBoundCRS()
{
CPLAssert(m_pj_bound_crs_target == nullptr);
CPLAssert(m_pj_bound_crs_co == nullptr);
CPLAssert(m_poRootBackup == nullptr);
CPLAssert(m_pj_crs_backup == nullptr);
m_pj_crs_modified_during_demote = false;
if (m_pjType == PJ_TYPE_BOUND_CRS)
{
auto baseCRS = proj_get_source_crs(getPROJContext(), m_pj_crs);
m_pj_bound_crs_target = proj_get_target_crs(getPROJContext(), m_pj_crs);
m_pj_bound_crs_co =
proj_crs_get_coordoperation(getPROJContext(), m_pj_crs);
m_poRootBackup = m_poRoot;
m_poRoot = nullptr;
m_pj_crs_backup = m_pj_crs;
m_pj_crs = baseCRS;
m_pjType = proj_get_type(m_pj_crs);
}
}
void OGRSpatialReference::Private::undoDemoteFromBoundCRS()
{
if (m_pj_bound_crs_target)
{
CPLAssert(m_poRoot == nullptr);
CPLAssert(m_pj_crs);
if (!m_pj_crs_modified_during_demote)
{
proj_destroy(m_pj_crs);
m_pj_crs = m_pj_crs_backup;
m_pjType = proj_get_type(m_pj_crs);
m_poRoot = m_poRootBackup;
}
else
{
delete m_poRootBackup;
m_poRootBackup = nullptr;
proj_destroy(m_pj_crs_backup);
m_pj_crs_backup = nullptr;
setPjCRS(proj_crs_create_bound_crs(getPROJContext(), m_pj_crs,
m_pj_bound_crs_target,
m_pj_bound_crs_co),
false);
}
}
m_poRootBackup = nullptr;
m_pj_crs_backup = nullptr;
proj_destroy(m_pj_bound_crs_target);
m_pj_bound_crs_target = nullptr;
proj_destroy(m_pj_bound_crs_co);
m_pj_bound_crs_co = nullptr;
m_pj_crs_modified_during_demote = false;
}
const char *OGRSpatialReference::Private::nullifyTargetKeyIfPossible(
const char *pszTargetKey)
{
if (pszTargetKey)
{
demoteFromBoundCRS();
if ((m_pjType == PJ_TYPE_GEOGRAPHIC_2D_CRS ||
m_pjType == PJ_TYPE_GEOGRAPHIC_3D_CRS) &&
EQUAL(pszTargetKey, "GEOGCS"))
{
pszTargetKey = nullptr;
}
else if (m_pjType == PJ_TYPE_GEOCENTRIC_CRS &&
EQUAL(pszTargetKey, "GEOCCS"))
{
pszTargetKey = nullptr;
}
else if (m_pjType == PJ_TYPE_PROJECTED_CRS &&
EQUAL(pszTargetKey, "PROJCS"))
{
pszTargetKey = nullptr;
}
else if (m_pjType == PJ_TYPE_VERTICAL_CRS &&
EQUAL(pszTargetKey, "VERT_CS"))
{
pszTargetKey = nullptr;
}
undoDemoteFromBoundCRS();
}
return pszTargetKey;
}
PJ *OGRSpatialReference::Private::getGeodBaseCRS()
{
if (m_pjType == PJ_TYPE_GEOGRAPHIC_2D_CRS ||
m_pjType == PJ_TYPE_GEOGRAPHIC_3D_CRS)
{
return m_pj_crs;
}
auto ctxt = getPROJContext();
if (m_pjType == PJ_TYPE_PROJECTED_CRS)
{
proj_assign_context(m_pj_geod_base_crs_temp, ctxt);
proj_destroy(m_pj_geod_base_crs_temp);
m_pj_geod_base_crs_temp = proj_crs_get_geodetic_crs(ctxt, m_pj_crs);
return m_pj_geod_base_crs_temp;
}
proj_assign_context(m_pj_geod_base_crs_temp, ctxt);
proj_destroy(m_pj_geod_base_crs_temp);
auto cs = proj_create_ellipsoidal_2D_cs(ctxt, PJ_ELLPS2D_LATITUDE_LONGITUDE,
nullptr, 0);
m_pj_geod_base_crs_temp = proj_create_geographic_crs(
ctxt, "WGS 84", "World Geodetic System 1984", "WGS 84",
SRS_WGS84_SEMIMAJOR, SRS_WGS84_INVFLATTENING, SRS_PM_GREENWICH, 0.0,
SRS_UA_DEGREE, CPLAtof(SRS_UA_DEGREE_CONV), cs);
proj_destroy(cs);
return m_pj_geod_base_crs_temp;
}
PJ *OGRSpatialReference::Private::getProjCRSCoordSys()
{
auto ctxt = getPROJContext();
if (m_pjType == PJ_TYPE_PROJECTED_CRS)
{
proj_assign_context(m_pj_proj_crs_cs_temp, ctxt);
proj_destroy(m_pj_proj_crs_cs_temp);
m_pj_proj_crs_cs_temp =
proj_crs_get_coordinate_system(getPROJContext(), m_pj_crs);
return m_pj_proj_crs_cs_temp;
}
proj_assign_context(m_pj_proj_crs_cs_temp, ctxt);
proj_destroy(m_pj_proj_crs_cs_temp);
m_pj_proj_crs_cs_temp = proj_create_cartesian_2D_cs(
ctxt, PJ_CART2D_EASTING_NORTHING, nullptr, 0);
return m_pj_proj_crs_cs_temp;
}
const char *OGRSpatialReference::Private::getProjCRSName()
{
if (m_pjType == PJ_TYPE_PROJECTED_CRS)
{
return proj_get_name(m_pj_crs);
}
return "unnamed";
}
OGRErr OGRSpatialReference::Private::replaceConversionAndUnref(PJ *conv)
{
refreshProjObj();
demoteFromBoundCRS();
auto projCRS =
proj_create_projected_crs(getPROJContext(), getProjCRSName(),
getGeodBaseCRS(), conv, getProjCRSCoordSys());
proj_destroy(conv);
setPjCRS(projCRS);
undoDemoteFromBoundCRS();
return OGRERR_NONE;
}
/************************************************************************/
/* ToPointer() */
/************************************************************************/
static inline OGRSpatialReference *ToPointer(OGRSpatialReferenceH hSRS)
{
return OGRSpatialReference::FromHandle(hSRS);
}
/************************************************************************/
/* ToHandle() */
/************************************************************************/
static inline OGRSpatialReferenceH ToHandle(OGRSpatialReference *poSRS)
{
return OGRSpatialReference::ToHandle(poSRS);
}
/************************************************************************/
/* OGRsnPrintDouble() */
/************************************************************************/
void OGRsnPrintDouble(char *pszStrBuf, size_t size, double dfValue);
void OGRsnPrintDouble(char *pszStrBuf, size_t size, double dfValue)
{
CPLsnprintf(pszStrBuf, size, "%.16g", dfValue);
const size_t nLen = strlen(pszStrBuf);
// The following hack is intended to truncate some "precision" in cases
// that appear to be roundoff error.
if (nLen > 15 && (strcmp(pszStrBuf + nLen - 6, "999999") == 0 ||
strcmp(pszStrBuf + nLen - 6, "000001") == 0))
{
CPLsnprintf(pszStrBuf, size, "%.15g", dfValue);
}
// Force to user periods regardless of locale.
if (strchr(pszStrBuf, ',') != nullptr)
{
char *const pszDelim = strchr(pszStrBuf, ',');
*pszDelim = '.';
}
}
/************************************************************************/
/* OGRSpatialReference() */
/************************************************************************/
/**
* \brief Constructor.
*
* This constructor takes an optional string argument which if passed
* should be a WKT representation of an SRS. Passing this is equivalent
* to not passing it, and then calling importFromWkt() with the WKT string.
*
* Note that newly created objects are given a reference count of one.
*
* Starting with GDAL 3.0, coordinates associated with a OGRSpatialReference
* object are assumed to be in the order of the axis of the CRS definition
(which
* for example means latitude first, longitude second for geographic CRS
belonging
* to the EPSG authority). It is possible to define a data axis to CRS axis
* mapping strategy with the SetAxisMappingStrategy() method.
*
* Starting with GDAL 3.5, the OSR_DEFAULT_AXIS_MAPPING_STRATEGY configuration
* option can be set to "TRADITIONAL_GIS_ORDER" / "AUTHORITY_COMPLIANT" (the
later
* being the default value when the option is not set) to control the value of
the
* data axis to CRS axis mapping strategy when a OSRSpatialReference object is
* created. Calling SetAxisMappingStrategy() will override this default value.
* The C function OSRNewSpatialReference() does the same thing as this
* constructor.
*
* @param pszWKT well known text definition to which the object should
* be initialized, or NULL (the default).
*/
OGRSpatialReference::OGRSpatialReference(const char *pszWKT)
: d(new Private(this))
{
if (pszWKT != nullptr)
importFromWkt(pszWKT);
}
/************************************************************************/
/* OSRNewSpatialReference() */
/************************************************************************/
/**
* \brief Constructor.
*
* Starting with GDAL 3.0, coordinates associated with a OGRSpatialReference
* object are assumed to be in the order of the axis of the CRS definition
* (which for example means latitude first, longitude second for geographic CRS
* belonging to the EPSG authority). It is possible to define a data axis to CRS
* axis mapping strategy with the SetAxisMappingStrategy() method.
*
* Starting with GDAL 3.5, the OSR_DEFAULT_AXIS_MAPPING_STRATEGY configuration
* option can be set to "TRADITIONAL_GIS_ORDER" / "AUTHORITY_COMPLIANT" (the
* later being the default value when the option is not set) to control the
* value of the data axis to CRS axis mapping strategy when a
* OSRSpatialReference object is created. Calling SetAxisMappingStrategy() will
* override this default value.
*
* This function is the same as OGRSpatialReference::OGRSpatialReference()
*/
OGRSpatialReferenceH CPL_STDCALL OSRNewSpatialReference(const char *pszWKT)
{
OGRSpatialReference *poSRS = new OGRSpatialReference();
if (pszWKT != nullptr && strlen(pszWKT) > 0)
{
if (poSRS->importFromWkt(pszWKT) != OGRERR_NONE)
{
delete poSRS;
poSRS = nullptr;
}
}
return ToHandle(poSRS);
}
/************************************************************************/
/* OGRSpatialReference() */
/************************************************************************/
/** Copy constructor. See also Clone().
* @param oOther other spatial reference
*/
OGRSpatialReference::OGRSpatialReference(const OGRSpatialReference &oOther)
: d(new Private(this))
{
*this = oOther;
}
/************************************************************************/
/* OGRSpatialReference() */
/************************************************************************/
/** Move constructor.
* @param oOther other spatial reference
*/
OGRSpatialReference::OGRSpatialReference(OGRSpatialReference &&oOther)
: d(std::move(oOther.d))
{
}
/************************************************************************/
/* ~OGRSpatialReference() */
/************************************************************************/
/**
* \brief OGRSpatialReference destructor.
*
* The C function OSRDestroySpatialReference() does the same thing as this
* method. Preferred C++ method : OGRSpatialReference::DestroySpatialReference()
*
* @deprecated
*/
OGRSpatialReference::~OGRSpatialReference()
{
}
/************************************************************************/
/* DestroySpatialReference() */
/************************************************************************/
/**
* \brief OGRSpatialReference destructor.
*
* This static method will destroy a OGRSpatialReference. It is
* equivalent to calling delete on the object, but it ensures that the
* deallocation is properly executed within the OGR libraries heap on
* platforms where this can matter (win32).
*
* This function is the same as OSRDestroySpatialReference()
*
* @param poSRS the object to delete
*
* @since GDAL 1.7.0
*/
void OGRSpatialReference::DestroySpatialReference(OGRSpatialReference *poSRS)
{
delete poSRS;
}
/************************************************************************/
/* OSRDestroySpatialReference() */
/************************************************************************/
/**
* \brief OGRSpatialReference destructor.
*
* This function is the same as OGRSpatialReference::~OGRSpatialReference()
* and OGRSpatialReference::DestroySpatialReference()
*
* @param hSRS the object to delete
*/
void CPL_STDCALL OSRDestroySpatialReference(OGRSpatialReferenceH hSRS)
{
delete ToPointer(hSRS);
}
/************************************************************************/
/* Clear() */
/************************************************************************/
/**
* \brief Wipe current definition.
*
* Returns OGRSpatialReference to a state with no definition, as it
* exists when first created. It does not affect reference counts.
*/
void OGRSpatialReference::Clear()
{
d->clear();
}
/************************************************************************/
/* operator=() */
/************************************************************************/
/** Assignment operator.
* @param oSource SRS to assign to *this
* @return *this
*/
OGRSpatialReference &
OGRSpatialReference::operator=(const OGRSpatialReference &oSource)
{
if (&oSource != this)
{
Clear();
#ifdef CPPCHECK
// Otherwise cppcheck would protest that nRefCount isn't modified
d->nRefCount = (d->nRefCount + 1) - 1;
#endif
oSource.d->refreshProjObj();
if (oSource.d->m_pj_crs)
d->setPjCRS(proj_clone(d->getPROJContext(), oSource.d->m_pj_crs));
if (oSource.d->m_axisMappingStrategy == OAMS_TRADITIONAL_GIS_ORDER)
SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
else if (oSource.d->m_axisMappingStrategy == OAMS_CUSTOM)
SetDataAxisToSRSAxisMapping(oSource.d->m_axisMapping);
d->m_coordinateEpoch = oSource.d->m_coordinateEpoch;
}
return *this;
}
/************************************************************************/
/* operator=() */
/************************************************************************/