Class: QgsMeshContours¶
- class qgis.analysis.QgsMeshContours¶
Bases:
sip.wrapper
Exporter of contours lines or polygons from a mesh layer.
Added in version 3.12.
QgsMeshContours(layer: Optional[QgsMeshLayer]) Constructs the mesh contours exporter. Caches the native and triangular mesh from data provider
- Parameters:
layer – mesh layer to be associated with this exporter
QgsMeshContours(a0:
QgsMeshContours
)Methods
Exports multi line string containing the contour line for particular dataset and value.
Exports multi polygons representing the areas with values in range for particular dataset
- exportLines(self, index: QgsMeshDatasetIndex, value: float, method: QgsMeshRendererScalarSettings.DataResamplingMethod, feedback: QgsFeedback | None = None) QgsGeometry ¶
Exports multi line string containing the contour line for particular dataset and value.
- Parameters:
index (QgsMeshDatasetIndex) – dataset index that is used to update the cache
value (float) – value of the contour line
method (QgsMeshRendererScalarSettings.DataResamplingMethod) – for datasets defined on faces, the method will be used to convert data to vertices
feedback (Optional[QgsFeedback] = None) – optional feedback object for progress and cancellation support
- Return type:
- Returns:
MultiLineString geometry containing contour lines
Note
not thread safe
- exportPolygons(self, index: QgsMeshDatasetIndex, min_value: float, max_value: float, method: QgsMeshRendererScalarSettings.DataResamplingMethod, feedback: QgsFeedback | None = None) QgsGeometry ¶
Exports multi polygons representing the areas with values in range for particular dataset
- Parameters:
index (QgsMeshDatasetIndex) – dataset index
min_value (float) – minimum of the value interval for contour polygon
max_value (float) – maximum of the value interval for contour polygon
method (QgsMeshRendererScalarSettings.DataResamplingMethod) – for datasets defined on faces, the method will be used to convert data to vertices
feedback (Optional[QgsFeedback] = None) – optional feedback object for progress and cancellation support
- Return type:
- Returns:
MultiPolygon geometry containing contour polygons
Note
not thread safe