23 const QMap<QString, QgsMapLayer *> &mapLayers = project->
mapLayers();
26 double min = std::numeric_limits<double>::quiet_NaN();
27 double max = std::numeric_limits<double>::quiet_NaN();
29 for ( QMap<QString, QgsMapLayer *>::const_iterator it = mapLayers.constBegin(); it != mapLayers.constEnd(); ++it )
31 currentLayer = it.value();
40 if ( layerRange.
lower() > std::numeric_limits< double >::lowest() )
42 if ( std::isnan( min ) || layerRange.
lower() < min )
43 min = layerRange.
lower();
46 if ( layerRange.
upper() < std::numeric_limits< double >::max() )
48 if ( std::isnan( max ) || layerRange.
upper() > max )
49 max = layerRange.
upper();
53 return QgsDoubleRange( std::isnan( min ) ? std::numeric_limits< double >::lowest() : min,
54 std::isnan( max ) ? std::numeric_limits< double >::max() : max );
59 const QMap<QString, QgsMapLayer *> &mapLayers = project->
mapLayers();
60 QList< QgsMapLayer * > layers;
61 for ( QMap<QString, QgsMapLayer *>::const_iterator it = mapLayers.constBegin(); it != mapLayers.constEnd(); ++it )
72 QSet< double > values;
76 if ( !currentLayer->elevationProperties() || !currentLayer->elevationProperties()->hasElevation() )
79 const QList< double > layerValues = currentLayer->elevationProperties()->significantZValues( currentLayer );
80 for (
double value : layerValues )
82 values.insert( value );
86 QList< double > res = qgis::setToList( values );
87 std::sort( res.begin(), res.end() );
98 switch ( layer->
type() )
104 properties->setEnabled(
true );
107 properties->setBandNumber( 1 );
@ RepresentsElevationSurface
Pixel values represent an elevation surface.
@ Group
Composite group layer. Added in QGIS 3.24.
@ Plugin
Plugin based layer.
@ TiledScene
Tiled scene layer. Added in QGIS 3.34.
@ Annotation
Contains freeform, georeferenced annotations. Added in QGIS 3.16.
@ VectorTile
Vector tile layer. Added in QGIS 3.14.
@ Mesh
Mesh layer. Added in QGIS 3.2.
@ PointCloud
Point cloud layer. Added in QGIS 3.18.
QgsRange which stores a range of double values.
bool isInfinite() const
Returns true if the range consists of all possible values.
static QList< double > significantZValuesForLayers(const QList< QgsMapLayer * > &layers)
Returns a list of significant elevation/z-values for the specified layers.
static QgsDoubleRange calculateZRangeForProject(QgsProject *project)
Calculates the elevation range for a project.
static bool enableElevationForLayer(QgsMapLayer *layer)
Automatically enables elevation for a map layer, using reasonable defaults.
static QList< double > significantZValuesForProject(QgsProject *project)
Returns a list of significant elevation/z-values for the specified project, using the values from lay...
static bool canEnableElevationForLayer(QgsMapLayer *layer)
Returns true if elevation can be enabled for a map layer.
virtual QgsDoubleRange calculateZRange(QgsMapLayer *layer) const
Attempts to calculate the overall elevation or z range for the specified layer, using the settings de...
virtual bool hasElevation() const
Returns true if the layer has an elevation or z component.
Base class for all map layer types.
virtual QgsMapLayerElevationProperties * elevationProperties()
Returns the layer's elevation properties.
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
QMap< QString, QgsMapLayer * > mapLayers(const bool validOnly=false) const
Returns a map of all registered layers by layer ID.
T lower() const
Returns the lower bound of the range.
T upper() const
Returns the upper bound of the range.
Raster layer specific subclass of QgsMapLayerElevationProperties.