QgsRasterIdentifyResult QgsGrassRasterProvider::identify( const QgsPoint & thePoint, QgsRaster::IdentifyFormat theFormat, const QgsRectangle &theExtent, int theWidth, int theHeight, int /*theDpi*/ )
{
Q_UNUSED( theExtent );
Q_UNUSED( theWidth );
Q_UNUSED( theHeight );
QgsDebugMsg( "Entered" );
QMap<int, QVariant> results;
QMap<int, QVariant> noDataResults;
noDataResults.insert( 1, QVariant() );
QgsRasterIdentifyResult noDataResult( QgsRaster::IdentifyFormatValue, results );
if ( theFormat != QgsRaster::IdentifyFormatValue )
{
return QgsRasterIdentifyResult( QGS_ERROR( tr( "Format not supported" ) ) );
}
if ( !extent().contains( thePoint ) )
{
return noDataResult;
}
// TODO: use doubles instead of strings
// attention, value tool does his own tricks with grass identify() so it stops to refresh values outside extent or null values e.g.
bool ok;
double value = mRasterValue.value( thePoint.x(), thePoint.y(), &ok );
if ( !ok )
{
return QgsRasterIdentifyResult( QGS_ERROR( tr( "Cannot read data" ) ) );
}
// no data?
if ( qIsNaN( value ) || qgsDoubleNear( value, mNoDataValue ) )
{
return noDataResult;
}
// Apply user no data
QgsRasterRangeList myNoDataRangeList = userNoDataValues( 1 );
if ( QgsRasterRange::contains( value, myNoDataRangeList ) )
{
return noDataResult;
}
results.insert( 1, value );
return QgsRasterIdentifyResult( QgsRaster::IdentifyFormatValue, results );
}
// Default implementation for values
QgsRasterIdentifyResult QgsRasterDataProvider::identify( const QgsPointXY &point, QgsRaster::IdentifyFormat format, const QgsRectangle &boundingBox, int width, int height, int /*dpi*/ )
{
QgsDebugMsgLevel( "Entered", 4 );
QMap<int, QVariant> results;
if ( format != QgsRaster::IdentifyFormatValue || !( capabilities() & IdentifyValue ) )
{
QgsDebugMsg( "Format not supported" );
return QgsRasterIdentifyResult( ERR( tr( "Format not supported" ) ) );
}
if ( !extent().contains( point ) )
{
// Outside the raster
for ( int bandNo = 1; bandNo <= bandCount(); bandNo++ )
{
results.insert( bandNo, QVariant() );
}
return QgsRasterIdentifyResult( QgsRaster::IdentifyFormatValue, results );
}
QgsRectangle finalExtent = boundingBox;
if ( finalExtent.isEmpty() )
finalExtent = extent();
if ( width == 0 )
{
width = capabilities() & Size ? xSize() : 1000;
}
if ( height == 0 )
{
height = capabilities() & Size ? ySize() : 1000;
}
// Calculate the row / column where the point falls
double xres = ( finalExtent.width() ) / width;
double yres = ( finalExtent.height() ) / height;
int col = static_cast< int >( std::floor( ( point.x() - finalExtent.xMinimum() ) / xres ) );
int row = static_cast< int >( std::floor( ( finalExtent.yMaximum() - point.y() ) / yres ) );
double xMin = finalExtent.xMinimum() + col * xres;
double xMax = xMin + xres;
double yMax = finalExtent.yMaximum() - row * yres;
double yMin = yMax - yres;
QgsRectangle pixelExtent( xMin, yMin, xMax, yMax );
for ( int i = 1; i <= bandCount(); i++ )
{
QgsRasterBlock *myBlock = block( i, pixelExtent, 1, 1 );
if ( myBlock )
{
double value = myBlock->value( 0 );
results.insert( i, value );
delete myBlock;
}
else
{
results.insert( i, QVariant() );
}
}
return QgsRasterIdentifyResult( QgsRaster::IdentifyFormatValue, results );
}
// Default implementation for values
QgsRasterIdentifyResult QgsRasterDataProvider::identify( const QgsPoint & thePoint, QgsRaster::IdentifyFormat theFormat, const QgsRectangle &theExtent, int theWidth, int theHeight )
{
QgsDebugMsg( "Entered" );
QMap<int, QVariant> results;
if ( theFormat != QgsRaster::IdentifyFormatValue || !( capabilities() & IdentifyValue ) )
{
QgsDebugMsg( "Format not supported" );
return QgsRasterIdentifyResult( ERR( tr( "Format not supported" ) ) );
}
if ( !extent().contains( thePoint ) )
{
// Outside the raster
for ( int bandNo = 1; bandNo <= bandCount(); bandNo++ )
{
results.insert( bandNo, QVariant() );
}
return QgsRasterIdentifyResult( QgsRaster::IdentifyFormatValue, results );
}
QgsRectangle myExtent = theExtent;
if ( myExtent.isEmpty() ) myExtent = extent();
if ( theWidth == 0 )
{
theWidth = capabilities() & Size ? xSize() : 1000;
}
if ( theHeight == 0 )
{
theHeight = capabilities() & Size ? ySize() : 1000;
}
// Calculate the row / column where the point falls
double xres = ( myExtent.width() ) / theWidth;
double yres = ( myExtent.height() ) / theHeight;
int col = ( int ) floor(( thePoint.x() - myExtent.xMinimum() ) / xres );
int row = ( int ) floor(( myExtent.yMaximum() - thePoint.y() ) / yres );
double xMin = myExtent.xMinimum() + col * xres;
double xMax = xMin + xres;
double yMax = myExtent.yMaximum() - row * yres;
double yMin = yMax - yres;
QgsRectangle pixelExtent( xMin, yMin, xMax, yMax );
for ( int i = 1; i <= bandCount(); i++ )
{
QgsRasterBlock * myBlock = block( i, pixelExtent, 1, 1 );
if ( myBlock )
{
double value = myBlock->value( 0 );
results.insert( i, value );
delete myBlock;
}
else
{
results.insert( i, QVariant() );
}
}
return QgsRasterIdentifyResult( QgsRaster::IdentifyFormatValue, results );
}
QgsRasterIdentifyResult QgsAmsProvider::identify( const QgsPointXY &point, QgsRaster::IdentifyFormat format, const QgsRectangle &extent, int width, int height, int dpi )
{
// http://resources.arcgis.com/en/help/rest/apiref/identify.html
QgsDataSourceUri dataSource( dataSourceUri() );
QUrl queryUrl( dataSource.param( QStringLiteral( "url" ) ) + "/identify" );
queryUrl.addQueryItem( QStringLiteral( "f" ), QStringLiteral( "json" ) );
queryUrl.addQueryItem( QStringLiteral( "geometryType" ), QStringLiteral( "esriGeometryPoint" ) );
queryUrl.addQueryItem( QStringLiteral( "geometry" ), QStringLiteral( "{x: %1, y: %2}" ).arg( point.x(), 0, 'f' ).arg( point.y(), 0, 'f' ) );
// queryUrl.addQueryItem( "sr", mCrs.postgisSrid() );
queryUrl.addQueryItem( QStringLiteral( "layers" ), QStringLiteral( "all:%1" ).arg( dataSource.param( QStringLiteral( "layer" ) ) ) );
queryUrl.addQueryItem( QStringLiteral( "imageDisplay" ), QStringLiteral( "%1,%2,%3" ).arg( width ).arg( height ).arg( dpi ) );
queryUrl.addQueryItem( QStringLiteral( "mapExtent" ), QStringLiteral( "%1,%2,%3,%4" ).arg( extent.xMinimum(), 0, 'f' ).arg( extent.yMinimum(), 0, 'f' ).arg( extent.xMaximum(), 0, 'f' ).arg( extent.yMaximum(), 0, 'f' ) );
queryUrl.addQueryItem( QStringLiteral( "tolerance" ), QStringLiteral( "10" ) );
const QString authcfg = dataSource.param( QStringLiteral( "authcfg" ) );
const QVariantList queryResults = QgsArcGisRestUtils::queryServiceJSON( queryUrl, authcfg, mErrorTitle, mError ).value( QStringLiteral( "results" ) ).toList();
QMap<int, QVariant> entries;
if ( format == QgsRaster::IdentifyFormatText )
{
for ( const QVariant &result : queryResults )
{
const QVariantMap resultMap = result.toMap();
QVariantMap attributesMap = resultMap[QStringLiteral( "attributes" )].toMap();
QString valueStr;
for ( auto it = attributesMap.constBegin(); it != attributesMap.constEnd(); ++it )
{
valueStr += QStringLiteral( "%1 = %2\n" ).arg( it.key(), it.value().toString() );
}
entries.insert( entries.size(), valueStr );
}
}
else if ( format == QgsRaster::IdentifyFormatFeature )
{
for ( const QVariant &result : queryResults )
{
const QVariantMap resultMap = result.toMap();
QgsFields fields;
const QVariantMap attributesMap = resultMap[QStringLiteral( "attributes" )].toMap();
QgsAttributes featureAttributes;
for ( auto it = attributesMap.constBegin(); it != attributesMap.constEnd(); ++it )
{
fields.append( QgsField( it.key(), QVariant::String, QStringLiteral( "string" ) ) );
featureAttributes.append( it.value().toString() );
}
QgsCoordinateReferenceSystem crs;
std::unique_ptr< QgsAbstractGeometry > geometry = QgsArcGisRestUtils::parseEsriGeoJSON( resultMap[QStringLiteral( "geometry" )].toMap(), resultMap[QStringLiteral( "geometryType" )].toString(), false, false, &crs );
QgsFeature feature( fields );
feature.setGeometry( QgsGeometry( std::move( geometry ) ) );
feature.setAttributes( featureAttributes );
feature.setValid( true );
QgsFeatureStore store( fields, crs );
QMap<QString, QVariant> params;
params[QStringLiteral( "sublayer" )] = resultMap[QStringLiteral( "layerName" )].toString();
params[QStringLiteral( "featureType" )] = attributesMap[resultMap[QStringLiteral( "displayFieldName" )].toString()].toString();
store.setParams( params );
store.addFeature( feature );
entries.insert( entries.size(), qVariantFromValue( QList<QgsFeatureStore>() << store ) );
}
}
return QgsRasterIdentifyResult( format, entries );
}