WCS time support

Author: blazek

src/gui/qgsowssourceselect.cpp

@@ -160,8 +160,8 @@ void QgsOWSSourceSelect::populateFormats()
   // selectedLayersFormats may come in various forms:
   // image/tiff, GTiff, GeoTIFF, TIFF, geotiff_int16, geotiff_rgb,
   // PNG, GTOPO30, ARCGRID, IMAGEMOSAIC
-  // and even any string defined in server configuration, for example the 
-  // value used in UMN Mapserver for OUTPUTFORMAT->NAME is used in 
+  // and even any string defined in server configuration, for example the
+  // value used in UMN Mapserver for OUTPUTFORMAT->NAME is used in
   // WCS 1.0.0 SupportedFormats/Format
 
   // TODO: It is impossible to cover all possible formats comming from server
@@ -241,6 +241,14 @@ void QgsOWSSourceSelect::populateFormats()
   mImageFormatsGroupBox->setEnabled( true );
 }
 
+void QgsOWSSourceSelect::populateTimes()
+{
+  QgsDebugMsg( "entered" );
+  mTimeComboBox->clear();
+  mTimeComboBox->insertItems( 0, selectedLayersTimes() );
+  mTimeComboBox->setEnabled( !selectedLayersTimes().isEmpty() );
+}
+
 void QgsOWSSourceSelect::populateConnectionList()
 {
   mConnectionsComboBox->clear();
@@ -436,7 +444,7 @@ void QgsOWSSourceSelect::on_mLayersTreeWidget_itemSelectionChanged()
 
 void QgsOWSSourceSelect::populateCRS()
 {
-  QgsDebugMsg ("Entered");
+  QgsDebugMsg( "Entered" );
   mSelectedLayersCRSs = selectedLayersCRSs().toSet();
   mCRSGroupBox->setTitle( tr( "Coordinate Reference System (%n available)", "crs count", mSelectedLayersCRSs.count() ) );
 
@@ -474,7 +482,7 @@ void QgsOWSSourceSelect::populateCRS()
     mSelectedCRS = "";
     mSelectedCRSLabel->setText( "" );
   }
-  QgsDebugMsg ("mSelectedCRS = " + mSelectedCRS);
+  QgsDebugMsg( "mSelectedCRS = " + mSelectedCRS );
   mChangeCRSButton->setEnabled( !mSelectedLayersCRSs.isEmpty() );
 }
 
@@ -535,6 +543,11 @@ QString QgsOWSSourceSelect::selectedCRS()
   return mSelectedCRS;
 }
 
+QString QgsOWSSourceSelect::selectedTime()
+{
+  return mTimeComboBox->currentText();
+}
+
 void QgsOWSSourceSelect::setConnectionListPosition()
 {
   QString toSelect = QgsOWSConnection::selectedConnection( mService );
@@ -805,6 +818,11 @@ QStringList QgsOWSSourceSelect::selectedLayersCRSs()
   return QStringList();
 }
 
+QStringList QgsOWSSourceSelect::selectedLayersTimes()
+{
+  return QStringList();
+}
+
 void QgsOWSSourceSelect::updateButtons()
 {
 }

src/gui/qgsowssourceselect.h

@@ -124,6 +124,9 @@ class GUI_EXPORT QgsOWSSourceSelect : public QDialog, public Ui::QgsOWSSourceSel
     //! Server CRS supported for currently selected layer item(s)
     virtual QStringList selectedLayersCRSs();
 
+    //! List of times (temporalDomain timePosition/timePeriod for currently selected layer item(s)
+    virtual QStringList selectedLayersTimes();
+
     //virtual QStringList layerCRS( int id );
 
     //! Populate the connection list combo box
@@ -138,6 +141,9 @@ class GUI_EXPORT QgsOWSSourceSelect : public QDialog, public Ui::QgsOWSSourceSel
     //! Set supported CRSs
     void populateCRS();
 
+    //! Populate times
+    void populateTimes();
+
     //! Connection name
     QString connName();
 
@@ -199,6 +205,9 @@ class GUI_EXPORT QgsOWSSourceSelect : public QDialog, public Ui::QgsOWSSourceSel
     //! Returns currently selected Crs
     QString selectedCRS();
 
+    //! Returns currently selected time
+    QString selectedTime();
+
     QList<QTreeWidgetItem*> mCurrentSelection;
     QTableWidgetItem* mCurrentTileset;
 

src/providers/wcs/URI

@@ -11,7 +11,9 @@ Parameters:
 
 * identifier (required) : Coverage name
 
-* format: (optional) : Supported format name. Default is the first supported format with tif in name or the first supported format.
+* time (optional) : time position or time period (beginPosition/endPosition[/timeResolution])
+
+* format (optional) : Supported format name. Default is the first supported format with tif in name or the first supported format.
 
 * crs (optional) : CRS in form AUTHORITY:ID, e.g. EPSG:4326. Default is EPSG:4326 if supported or the first supported CRS.
 

src/providers/wcs/qgswcscapabilities.cpp

@@ -196,15 +196,15 @@ bool QgsWcsCapabilities::retrieveServerCapabilities( )
 
   if ( !preferredVersion.isEmpty() )
   {
-    // This is not 
-    if ( preferredVersion.startsWith ( "1.0" ) )
+    // This is not
+    if ( preferredVersion.startsWith( "1.0" ) )
     {
       versions << "VERSION=" + preferredVersion;
     }
-    else if ( preferredVersion.startsWith ( "1.1" ) )
+    else if ( preferredVersion.startsWith( "1.1" ) )
     {
-        // Ignored by UMN Mapserver 6.0.3, see below
-        versions << "AcceptVersions=" + preferredVersion;
+      // Ignored by UMN Mapserver 6.0.3, see below
+      versions << "AcceptVersions=" + preferredVersion;
     }
   }
   else
@@ -214,7 +214,7 @@ bool QgsWcsCapabilities::retrieveServerCapabilities( )
     versions << "AcceptVersions=1.1,1.0" << "VERSION=1.0";
   }
 
-  foreach( QString v, versions )
+  foreach ( QString v, versions )
   {
     if ( retrieveServerCapabilities( v ) )
     {
@@ -427,7 +427,7 @@ bool QgsWcsCapabilities::parseCapabilitiesDom( QByteArray const &xml, QgsWcsCapa
     capabilities.abstract = domElementText( docElem, "ServiceIdentification.Abstract" );
 
     QList<QDomElement> operationElements = domElements( docElem, "OperationsMetadata.Operation" );
-    foreach( QDomElement el, operationElements )
+    foreach ( QDomElement el, operationElements )
     {
       if ( el.attribute( "name" ) == "GetCoverage" )
       {
@@ -509,7 +509,7 @@ QStringList QgsWcsCapabilities::domElementsTexts( const QDomElement &element, co
   QStringList list;
   QList<QDomElement> elems = domElements( element, path );
 
-  foreach( QDomElement el, elems )
+  foreach ( QDomElement el, elems )
   {
     list << el.text();
   }
@@ -539,9 +539,8 @@ QString QgsWcsCapabilities::domElementText( const QDomElement &element, const QS
 QList<int> QgsWcsCapabilities::parseInts( const QString &text )
 {
   QList<int> list;
-  foreach( QString s, text.split( " " ) )
+  foreach ( QString s, text.split( " " ) )
   {
-    int i;
     bool ok;
     list.append( s.toInt( &ok ) );
     if ( !ok )
@@ -556,9 +555,8 @@ QList<int> QgsWcsCapabilities::parseInts( const QString &text )
 QList<double> QgsWcsCapabilities::parseDoubles( const QString &text )
 {
   QList<double> list;
-  foreach( QString s, text.split( " " ) )
+  foreach ( QString s, text.split( " " ) )
   {
-    int i;
     bool ok;
     list.append( s.toDouble( &ok ) );
     if ( !ok )
@@ -758,7 +756,7 @@ bool QgsWcsCapabilities::parseDescribeCoverageDom10( QByteArray const &xml, QgsW
 
   QgsDebugMsg( QString( "%1 envelopeElements found" ).arg( envelopeElements.size() ) );
 
-  foreach( QDomElement el, envelopeElements )
+  foreach ( QDomElement el, envelopeElements )
   {
     QString srsName = el.attribute( "srsName" );
 
@@ -779,10 +777,30 @@ bool QgsWcsCapabilities::parseDescribeCoverageDom10( QByteArray const &xml, QgsW
     }
   }
 
+  coverage->times = domElementsTexts( coverageOfferingElement, "domainSet.temporalDomain.timePosition" );
+
+  QList<QDomElement> timePeriodElements = domElements( coverageOfferingElement, "domainSet.temporalDomain.timePeriod" );
+
+  QgsDebugMsg( QString( "%1 timePeriod found" ).arg( timePeriodElements.size() ) );
+
+  foreach ( QDomElement el, timePeriodElements )
+  {
+    QString beginPosition = domElementText( el, "beginPosition" );
+    QString endPosition = domElementText( el, "endPosition" );
+    QString timeResolution = domElementText( el, "timeResolution" );
+    // Format used in request
+    QString time = beginPosition + "/" + endPosition;
+    if ( !timeResolution.isEmpty() )
+    {
+      time += "/" + timeResolution;
+    }
+    coverage->times << time;
+  }
+
   // Find native bounding box
   if ( !coverage->nativeCrs.isEmpty() )
   {
-    foreach( QString srsName, coverage->boundingBoxes.keys() )
+    foreach ( QString srsName, coverage->boundingBoxes.keys() )
     {
       if ( srsName == coverage->nativeCrs )
       {
@@ -793,7 +811,7 @@ bool QgsWcsCapabilities::parseDescribeCoverageDom10( QByteArray const &xml, QgsW
 
   // NULL / no data values
   // TODO: handle multiple range sets
-  foreach( QString text, domElementsTexts( coverageOfferingElement, "rangeSet.RangeSet.nullValue.singleValue" ) )
+  foreach ( QString text, domElementsTexts( coverageOfferingElement, "rangeSet.RangeSet.nullValue.singleValue" ) )
   {
     bool ok;
     double val = text.toDouble( &ok );
@@ -840,7 +858,7 @@ bool QgsWcsCapabilities::parseDescribeCoverageDom11( QByteArray const &xml, QgsW
 
   QgsDebugMsg( QString( "%1 BoundingBox found" ).arg( boundingBoxElements.size() ) );
 
-  foreach( QDomElement el, boundingBoxElements )
+  foreach ( QDomElement el, boundingBoxElements )
   {
     QString authid = crsUrnToAuthId( el.attribute( "crs" ) );
     QList<double> low = parseDoubles( domElementText( el, "LowerCorner" ) );
@@ -876,9 +894,29 @@ bool QgsWcsCapabilities::parseDescribeCoverageDom11( QByteArray const &xml, QgsW
     // if urn:ogc:def:crs:OGC::imageCRS BoundingBox was not found
   }
 
+  coverage->times = domElementsTexts( docElem, "CoverageDescription.Domain.TemporalDomain.timePosition" );
+
+  QList<QDomElement> timePeriodElements = domElements( docElem, "CoverageDescription.Domain.TemporalDomain.timePeriod" );
+
+  QgsDebugMsg( QString( "%1 timePeriod found" ).arg( timePeriodElements.size() ) );
+
+  foreach ( QDomElement el, timePeriodElements )
+  {
+    QString beginPosition = domElementText( el, "beginTime" );
+    QString endPosition = domElementText( el, "endTime" );
+    QString timeResolution = domElementText( el, "timeResolution" );
+    // Format used in request
+    QString time = beginPosition + "/" + endPosition;
+    if ( !timeResolution.isEmpty() )
+    {
+      time += "/" + timeResolution;
+    }
+    coverage->times << time;
+  }
+
   // NULL / no data values
   // TODO: handle multiple fields / ranges (?)
-  foreach( QString text, domElementsTexts( docElem, "CoverageDescription.Range.Field.NullValue" ) )
+  foreach ( QString text, domElementsTexts( docElem, "CoverageDescription.Range.Field.NullValue" ) )
   {
     bool ok;
     double val = text.toDouble( &ok );

src/providers/wcs/qgswcscapabilities.h

@@ -49,6 +49,8 @@ struct QgsWcsCoverageSummary
   // Map of bounding boxes, key is CRS name (srsName), e.g. EPSG:4326
   QMap<QString, QgsRectangle> boundingBoxes;
   QgsRectangle  nativeBoundingBox;
+  // timePosition or timePeriod (beginPosition/endPosition[/timeResolution] - used in KVP request)
+  QStringList times;
   QVector<QgsWcsCoverageSummary> coverageSummary;
   // non reflecting Capabilities structure:
   bool valid;

src/providers/wcs/qgswcsprovider.cpp

@@ -357,6 +357,8 @@ bool QgsWcsProvider::parseUri( QString uriString )
 
   mIdentifier = uri.param( "identifier" );
 
+  mTime = uri.param( "time" );
+
   setFormat( uri.param( "format" ) );
 
   if ( !uri.param( "crs" ).isEmpty() )
@@ -561,6 +563,10 @@ void QgsWcsProvider::getCache( int bandNo, QgsRectangle  const & viewExtent, int
   if ( mCapabilities.version().startsWith( "1.0" ) )
   {
     setQueryItem( url, "COVERAGE", mIdentifier );
+    if ( !mTime.isEmpty() )
+    {
+      setQueryItem( url, "TIME", mTime );
+    }
     setQueryItem( url, "BBOX", bbox );
     setQueryItem( url, "CRS", crs ); // request BBOX CRS
     setQueryItem( url, "RESPONSE_CRS", crs ); // response CRS
@@ -574,6 +580,12 @@ void QgsWcsProvider::getCache( int bandNo, QgsRectangle  const & viewExtent, int
     setQueryItem( url, "IDENTIFIER", mIdentifier );
     QString crsUrn = QString( "urn:ogc:def:crs:%1::%2" ).arg( crs.split( ':' ).value( 0 ) ).arg( crs.split( ':' ).value( 1 ) );
     bbox += "," + crsUrn;
+
+    if ( !mTime.isEmpty() )
+    {
+      setQueryItem( url, "TIMESEQUENCE", mTime );
+    }
+
     setQueryItem( url, "BOUNDINGBOX", bbox );
 
     //   GridBaseCRS=urn:ogc:def:crs:SG:6.6:32618
@@ -1292,7 +1304,7 @@ QString QgsWcsProvider::metadata()
   metadata += tr( "Coverages" );
   metadata += "</th></tr>";
 
-  foreach( QgsWcsCoverageSummary c, mCapabilities.coverages() )
+  foreach ( QgsWcsCoverageSummary c, mCapabilities.coverages() )
   {
     metadata += coverageMetadata( c );
   }

src/providers/wcs/qgswcsprovider.h

@@ -251,6 +251,9 @@ class QgsWcsProvider : public QgsRasterDataProvider, QgsGdalProviderBase
     //! Identifier / coverage / layer name
     QString mIdentifier;
 
+    //! Time (temporalDomain), optional
+    QString mTime;
+
     //! Format of coverage to be used in request
     QString mFormat;
 

src/providers/wcs/qgswcssourceselect.cpp

@@ -144,6 +144,12 @@ void QgsWCSSourceSelect::addClicked( )
     uri.setParam( "format", selectedFormat() );
   }
 
+  QgsDebugMsg( "selectedTime = " +  selectedTime() );
+  if ( !selectedTime().isEmpty() )
+  {
+    uri.setParam( "time", selectedTime() );
+  }
+
   emit addRasterLayer( uri.encodedUri(), identifier, "wcs" );
 }
 
@@ -154,11 +160,9 @@ void QgsWCSSourceSelect::on_mLayersTreeWidget_itemSelectionChanged()
   QString identifier = selectedIdentifier();
   if ( identifier.isEmpty() ) { return; }
 
-  if ( mCapabilities.version().startsWith( "1.0" ) )
-  {
-    // 1.0 get additional info
-    mCapabilities.describeCoverage( identifier );
-  }
+  mCapabilities.describeCoverage( identifier );
+
+  populateTimes();
 
   populateFormats();
 
@@ -194,7 +198,7 @@ QList<QgsOWSSupportedFormat> QgsWCSSourceSelect::providerFormats()
   QList<QgsOWSSupportedFormat> formats;
 
   QMap<QString, QString> mimes = QgsWcsProvider::supportedMimes();
-  foreach( QString mime, mimes.keys() )
+  foreach ( QString mime, mimes.keys() )
   {
     QgsOWSSupportedFormat format = { mime, mimes.value( mime ) };
 
@@ -239,6 +243,20 @@ QStringList QgsWCSSourceSelect::selectedLayersCRSs()
   return c.supportedCrs;
 }
 
+QStringList QgsWCSSourceSelect::selectedLayersTimes()
+{
+  QgsDebugMsg( "entered" );
+
+  QString identifier = selectedIdentifier();
+  if ( identifier.isEmpty() ) { return QStringList(); }
+
+  QgsWcsCoverageSummary c = mCapabilities.coverage( identifier );
+  if ( !c.valid ) { return QStringList(); }
+
+  QgsDebugMsg( "times = " + c.times.join( "," ) );
+  return c.times;
+}
+
 void QgsWCSSourceSelect::enableLayersForCrs( QTreeWidgetItem * )
 {
   // TODO: I am not convinced to disable layers according to selected CRS

src/providers/wcs/qgswcssourceselect.h

@@ -78,6 +78,7 @@ class QgsWCSSourceSelect : public QgsOWSSourceSelect
     QList<QgsOWSSupportedFormat> providerFormats();
     QStringList selectedLayersFormats();
     QStringList selectedLayersCRSs();
+    QStringList selectedLayersTimes();
 };
 #endif // QGSWCSSOURCESELECT_H