analysis¶

QgsAlignRasterData	The `QgsAlignRasterData` class provides data structures and enums for align raster tool.
QgsAnalysis	`QgsAnalysis` is a singleton class containing various registry and other global members related to analysis classes.

Geometry Checker¶

QgsFeaturePool	A feature pool is based on a vector layer and caches features.
QgsGeometryCheck	This class implements a geometry check.
QgsGeometryCheckContext	Base configuration for geometry checks.
QgsGeometryCheckError	This represents an error reported by a geometry check.
QgsGeometryCheckErrorSingle	Wraps a `QgsSingleGeometryError` into a standard `QgsGeometryCheckError`. The single error can be obtained via singleError.
QgsGeometryCheckFactory	A factory for geometry checks.
QgsGeometryCheckRegistry	This class manages all known geometry check factories.
QgsGeometryCheckResolutionMethod	This class implements a resolution for problems detected in geometry checks.
QgsGeometryCheckerUtils	Contains utilities required for geometry checks.
QgsSingleGeometryCheck	Base class for geometry checks for a single geometry without any context of the layer or other layers in the project. Classic examples are validity checks like self-intersection.
QgsSingleGeometryCheckError	An error from a `QgsSingleGeometryCheck`.

QgsGcpGeometryTransformer	A geometry transformer which uses an underlying Ground Control Points (GCP) based transformation to modify geometries.
QgsGcpPoint	Contains properties of a ground control point (GCP).
QgsGcpTransformerInterface	An interface for Ground Control Points (GCP) based transformations.
QgsVectorWarper	Vector layer warper which warps vector layers based on a list of source and destination GCPs.
QgsVectorWarperTask	A task for warping a vector layer in a background thread.

QgsGridFileWriter	A class that does interpolation to a grid and writes the results to an ascii grid.
QgsIDWInterpolator	Inverse distance weight interpolator.
QgsInterpolator	Interface class for interpolations.
QgsInterpolatorVertexData	Interpolation data for an individual source vertex.
QgsTinInterpolator	Interpolation in a triangular irregular network

QgsMeshContours	Exporter of contours lines or polygons from a mesh layer.
QgsMeshEditingDelaunayTriangulation	Class that can be used with `QgsMeshEditor.advancedEdit()` to add triangle faces to a mesh created by a Delaunay triangulation on provided existing vertex.
QgsMeshTriangulation	Class that handles mesh creation with Delaunay constrained triangulation
QgsMeshZValueDatasetGroup	Convenient class that can be used to obtain a datasetgroup on vertices that represents the Z value of the mesh vertices

QgsGraph	Mathematical graph representation
QgsGraphAnalyzer	This class performs graph analysis, e.g. calculates shortest path between two points using different strategies with Dijkstra algorithm
QgsGraphBuilder	This class used for making the `QgsGraph` object
QgsGraphBuilderInterface	Determine interface for creating a graph. Contains the settings of the graph. `QgsGraphBuilder` and `QgsGraphDirector` both use a “builder” design pattern
QgsGraphDirector	Determine making the graph. `QgsGraphBuilder` and `QgsGraphDirector` implemented using “builder” design patter.
QgsGraphEdge	This class implements a graph edge
QgsGraphVertex	This class implements a graph vertex
QgsNetworkDistanceStrategy	Strategy for calculating edge cost based on its length. Should be used for finding shortest path between two points.
QgsNetworkSpeedStrategy	Strategy for calculating edge cost based on travel time. Should be used for finding fastest path between two points.
QgsNetworkStrategy	`QgsNetworkStrategy` defines strategy used for calculation of the edge cost. For example it can take into account travel distance, amount of time or money. Currently there are two strategies implemented in the analysis library: `QgsNetworkDistanceStrategy` and `QgsNetworkSpeedStrategy`. `QgsNetworkStrategy` implemented using “strategy” design pattern.
QgsVectorLayerDirector	Determine making the graph from vector line layer

QgsBatchGeocodeAlgorithm	A base class for batch geocoder algorithms, which takes a `QgsGeocoderInterface` object and exposes it as a Processing algorithm for batch geocoding operations.
QgsNativeAlgorithms	Native c++ processing algorithm provider.

QgsAlignRaster	`QgsAlignRaster` takes one or more raster layers and warps (resamples) them so they have the same:
QgsAspectFilter	Calculates aspect values in a window of 3x3 cells based on first order derivatives in x- and y- directions.
QgsDerivativeFilter	Adds the ability to calculate derivatives in x- and y-directions.
QgsExifTools	Contains utilities for working with EXIF tags in images.
QgsHillshadeFilter	A hillshade filter.
QgsKernelDensityEstimation	Performs Kernel Density Estimation (“heatmap”) calculations on a vector layer.
QgsNineCellFilter	Base class for raster analysis methods that work with a 3x3 cell filter and calculate the value of each cell based on the cell value and the eight neighbour cells.
QgsRasterCalcNode	Represents a node in a raster calculator.
QgsRasterCalculator	Performs raster layer calculations.
QgsRasterCalculatorEntry	Represents an individual raster layer/band number entry within a raster calculation.
QgsRasterMatrix	Represents a matrix in a raster calculator operation.
QgsRelief	Produces colored relief rasters from DEM.
QgsRuggednessFilter	Calculates the ruggedness index based on a 3x3 moving window.
QgsSlopeFilter	Calculates slope values in a window of 3x3 cells based on first order derivatives in x- and y- directions.
QgsTotalCurvatureFilter	Calculates total curvature as described by Wilson, Gallant (2000): terrain analysis.

QgsGeometrySnapper	`QgsGeometrySnapper` allows a geometry to be snapped to the geometries within a different reference layer. Vertices in the geometries will be modified to match the reference layer features within a specified snap tolerance.
QgsGeometrySnapperSingleSource	Makes sure that any two vertices of the vector layer are at least at distance given by the threshold value.
QgsInternalGeometrySnapper	`QgsInternalGeometrySnapper` allows a set of geometries to be snapped to each other. It can be used to close gaps in layers.
QgsZonalStatistics	A class that calculates raster statistics (count, sum, mean) for a polygon or multipolygon layer and appends the results as attributes.