initial WCS support based on GDAL

qgis · Apr 25, 2012 · 7d500ea · 7d500ea
1 parent 13bbb60
commit 7d500ea
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Showing 7 changed files with 1,491 additions and 3 deletions.
diff --git a/src/providers/gdal/CMakeLists.txt b/src/providers/gdal/CMakeLists.txt
@@ -1,9 +1,21 @@
-SET(GDAL_SRCS qgsgdalprovider.cpp qgsgdaldataitems.cpp)
-SET(GDAL_MOC_HDRS  qgsgdalprovider.h)
+SET(GDAL_SRCS 
+  qgsgdalprovider.cpp 
+  qgsgdaldataitems.cpp 
+  qgswcscapabilities.cpp 
+  qgswcssourceselect.cpp
+)
+SET(GDAL_MOC_HDRS  
+  qgsgdalprovider.h 
+  qgsgdaldataitems.h
+  qgswcscapabilities.h 
+  qgswcssourceselect.h
+)
 
 INCLUDE_DIRECTORIES (
   ../../core
   ../../core/raster
+  ../../gui
+  ${CMAKE_CURRENT_BINARY_DIR}/../../ui
   ${GDAL_INCLUDE_DIR}
 #  ${PROJ_INCLUDE_DIR}
 #  ${GEOS_INCLUDE_DIR}
@@ -14,6 +26,7 @@ ADD_LIBRARY (gdalprovider MODULE ${GDAL_SRCS} ${GDAL_MOC_SRCS})
 
 TARGET_LINK_LIBRARIES (gdalprovider
   qgis_core
+  qgis_gui
 )
 
 INSTALL(TARGETS gdalprovider

diff --git a/src/providers/gdal/qgsgdaldataitems.cpp b/src/providers/gdal/qgsgdaldataitems.cpp
@@ -1,6 +1,8 @@
 #include "qgsgdaldataitems.h"
 #include "qgsgdalprovider.h"
 #include "qgslogger.h"
+//#include "qgsowssourceselect.h"
+#include "qgswcssourceselect.h"
 
 #include <QFileInfo>
 
@@ -146,3 +148,8 @@ QGISEXTERN QgsDataItem * dataItem( QString thePath, QgsDataItem* parentItem )
   }
   return 0;
 }
+
+QGISEXTERN QgsWCSSourceSelect * selectWidget( QWidget * parent, Qt::WFlags fl )
+{
+  return new QgsWCSSourceSelect( parent, fl );
+}
diff --git a/src/providers/gdal/qgsgdalprovider.cpp b/src/providers/gdal/qgsgdalprovider.cpp
@@ -24,11 +24,13 @@
 #include "qgsapplication.h"
 #include "qgscoordinatetransform.h"
 #include "qgsdataitem.h"
+#include "qgsdatasourceuri.h"
 #include "qgsrectangle.h"
 #include "qgscoordinatereferencesystem.h"
 #include "qgsrasterbandstats.h"
 #include "qgsrasterlayer.h"
 #include "qgsrasterpyramid.h"
+#include "qgswcscapabilities.h"
 
 #include <QImage>
 #include <QSettings>
@@ -105,8 +107,33 @@ QgsGdalProvider::QgsGdalProvider( QString const & uri )
 
   mGdalDataset = NULL;
 
+  // The uri is either a file name or encoded parameters for WCS
+  QString gdalUri = uri;
+  if ( uri.contains("url=") && uri.contains("identifier=") && !QFile::exists(uri) )
+  {
+    // WCS
+    QgsDataSourceURI dsUri;
+    dsUri.setEncodedUri( uri );
+    gdalUri = "<WCS_GDAL>";
+    // prepareUri adds ? or & if necessary, GDAL fails otherwise
+    gdalUri += "<ServiceURL>" + QgsWcsCapabilities::prepareUri( dsUri.param("url") ) + "</ServiceURL>";
+    gdalUri += "<CoverageName>" + dsUri.param("identifier") + "</CoverageName>";
+    gdalUri += "<PreferredFormat>" + dsUri.param("format") + "</PreferredFormat>";
+
+    // TODO: There is no tag for CRS response.
+    // There is undocumented CRS tag, but it only overrides CRS param in requests 
+    // but BBOX is left unchanged and thus results in server error (usually).
+    gdalUri += "<GetCoverageExtra>&amp;RESPONSE_CRS=" + dsUri.param("crs") + "</GetCoverageExtra>";
+    if ( dsUri.hasParam("username") && dsUri.hasParam("password") ) 
+    {
+      gdalUri += "<UserPwd>" + dsUri.param("username") + ":" + dsUri.param("password") + "</UserPwd>";
+    }
+    gdalUri += "</WCS_GDAL>";
+    QgsDebugMsg( "WCS uri: " + gdalUri );
+  }
+
   //mGdalBaseDataset = GDALOpen( QFile::encodeName( uri ).constData(), GA_ReadOnly );
-  mGdalBaseDataset = GDALOpen( TO8F( uri ), GA_ReadOnly );
+  mGdalBaseDataset = GDALOpen( TO8F( gdalUri ), GA_ReadOnly );
 
   CPLErrorReset();
   if ( mGdalBaseDataset == NULL )
@@ -1168,6 +1195,8 @@ int QgsGdalProvider::srcDataType( int bandNo ) const
 
 int QgsGdalProvider::dataType( int bandNo ) const
 {
+  if ( mGdalDataType.size() == 0 ) return QgsRasterDataProvider::UnknownDataType;
+
   return dataTypeFormGdal( mGdalDataType[bandNo-1] );
 }