Class: QgsMeshContours¶
- class qgis.analysis.QgsMeshContours¶
Bases:
sip.wrapper
Exporter of contours lines or polygons from a mesh layer.
New in version 3.12.
QgsMeshContours(layer:
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(
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) 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 (
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) 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 (
QgsFeedback
= None) – optional feedback object for progress and cancellation support
- Return type
- Returns
MultiPolygon geometry containing contour polygons
Note
not thread safe