24.2.5. Raster projections

24.2.5.1. Assign projection

Applies a coordinate system to a raster dataset.

This algorithm is derived from the GDAL edit utility.

Default menu: Raster ► Projections

Parâmetros

Etiqueta	Nome	Tipo	Descrição
Camada de entrada	INPUT_LAYER	[raster]	Camada raster de entrada
Desired CRS	SRC	[crs]	The projection (CRS) of the output layer

Saídas

Etiqueta	Nome	Tipo	Descrição
Layer with projection	SAÍDA	[raster]	The output raster layer (with the new projection information)

Python code

Algorithm ID: gdal:assignprojection

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Usando os algoritmos do processamento a partir do Terminal Python. for details on how to run processing algorithms from the Python console.

24.2.5.2. Extract projection

Extracts the projection of a raster file and writes it into a world file with extension .wld.

This algorithm is derived from the GDAL srsinfo utility.

Default menu: Raster ► Projections

Parâmetros

Etiqueta	Nome	Tipo	Descrição
Input file	INPUT_LAYER	[raster]	Input raster The raster layer has to be file based, as the algorithm uses the path to the raster file as the location of the generated .wld file. Using a non-file raster layer will lead to an error.
Create also .prj file	PRJ_FILE_CREATE	[boolean] Padrão: Falso	If this is activated a .prj file containing the projection information is also created.

Saídas

Etiqueta	Nome	Tipo	Descrição
World file	WORLD_FILE	[file]	Text file with extension .wld containing transformation parameters for the raster file.
ESRI Shapefile prj file	PRJ_FILE	[file]	Text file with .prj extension that describes the CRS. Will be None if Create also .prj file is False.

Python code

Algorithm ID: gdal:extractprojection

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Usando os algoritmos do processamento a partir do Terminal Python. for details on how to run processing algorithms from the Python console.

24.2.5.3. Warp (reproject)

Reprojects a raster layer into another Coordinate Reference System (CRS). The output file resolution and the resampling method can be chosen.

This algorithm is derived from the GDAL warp utility.

Default menu: Raster ► Projections

Parâmetros

Etiqueta	Nome	Tipo	Descrição
Camada de entrada	ENTRADA	[raster]	Input raster layer to reproject
SRC de Origem Opcional	SRC_ORIGEM	[crs]	Defines the CRS of the input raster layer
SRC Alvo Opcional	SRC_ALVO	[crs] Padrão: EPSG:4326	O SRC da camada de saída
Resampling method to use	RESAMPLING	[enumeration] Padrão: 0	Pixel value resampling method to use. Options: 0 — Nearest neighbour 1 — Bilinear 2 — Cubic 3 — Cubic spline 4 — Lanczos windowed sinc 5 — Average 6 — Mode 7 — Maximum 8 — Minimum 9 — Median 10 — First quartile 11 — Third quartile
Nodata value for output bands Opcional	NODATA	[number] Padrão: Nenhum	Sets nodata value for output bands. If not provided, then nodata values will be copied from the source dataset.
Output file resolution in target georeferenced units Opcional	TARGET_RESOLUTION	[number] Padrão: Nenhum	Defines the output file resolution of reprojection result
Opções de criação adicionais Opcional	OPÇÕES	[string] Padrão: ‘’	Para adicionar uma ou mais opções de criação que controlam o raster a ser criado (cores, tamanho do bloco, compactação de arquivos …). Por conveniência, você pode contar com perfis predefinidos (veja seção de opções do driver GDAL). For Batch Process: separate multiple options with a pipe character (|).
Tipo de dados de saída	DATA_TYPE	[enumeration] Padrão: 0	Define o formato do arquivo de raster saída. Opções: 0 — Use input layer data type 1 — Byte 2 — Int16 3 — UInt16 4 — UInt32 5 — Int32 6 — Float32 7 — Float64 8 — CInt16 9 — CInt32 10 — CFloat32 11 — CFloat64
Georeferenced extents of output file to be created Opcional	TARGET_EXTENT	[extent]	Sets the georeferenced extent of the output file to be created (in the Target CRS by default. In the CRS of the target raster extent, if specified).
CRS of the target raster extent Opcional	TARGET_EXTENT_CRS	[crs]	Specifies the CRS in which to interpret the coordinates given for the extent of the output file. This must not be confused with the target CRS of the output dataset. It is instead a convenience e.g. when knowing the output coordinates in a geodetic long/lat CRS, but wanting a result in a projected coordinate system.
Use multithreaded warping implementation	MULTITHREADING	[boolean] Padrão: Falso	Two threads will be used to process chunks of the image and perform input/output operations simultaneously. Note that the computation itself is not multithreaded.
Parâmetros adicionais da linha de comando Opcional	EXTRA	[string] Padrão: Nenhum	Add extra GDAL command line options.
Reprojetado	SAÍDA	[raster] Default: ‘[Save to temporary file]’	Especificação da camada raster de saída. Um de: Salvar como Arquivo Temporário Salvar para Arquivo… A codificação do arquivo também pode ser alterada aqui.

Saídas

Etiqueta	Nome	Tipo	Descrição
Reprojetado	SAÍDA	[raster] Default: [Save to temporary file]	Reprojected output raster layer

Python code

Algorithm ID: gdal:warpreproject

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Usando os algoritmos do processamento a partir do Terminal Python. for details on how to run processing algorithms from the Python console.