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

Parametri

Etichetă	Nume	Tipul	Descriere
Input layer	INPUT_LAYER	[raster]	Input raster layer
Desired CRS	CRS	[crs]	The projection (CRS) of the output layer

Rezultat

Etichetă	Nume	Tipul	Descriere
Layer with projection	OUTPUT	[raster]	The output raster layer (with the new projection information)

Python code

Algorithm ID: gdal:assignprojection

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

ID-ul algoritmului se afișează atunci când treceți peste algoritmul din caseta instrumentelor de procesare. Dicționarul parametrilor furnizează valorile și NUMELE parametrilor. Pentru detalii despre rularea algoritmilor de procesare din consola Python, parcurgeți Utilizarea algoritmilor de procesare din consolă.

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

Parametri

Etichetă	Nume	Tipul	Descriere
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] Default: False	If this is activated a .prj file containing the projection information is also created.

Rezultat

Etichetă	Nume	Tipul	Descriere
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})

ID-ul algoritmului se afișează atunci când treceți peste algoritmul din caseta instrumentelor de procesare. Dicționarul parametrilor furnizează valorile și NUMELE parametrilor. Pentru detalii despre rularea algoritmilor de procesare din consola Python, parcurgeți Utilizarea algoritmilor de procesare din consolă.

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

Parametri

Etichetă	Nume	Tipul	Descriere
Input layer	INPUT	[raster]	Input raster layer to reproject
Source CRS Opţional	SOURCE_CRS	[crs]	Defines the CRS of the input raster layer
Target CRS Opţional	TARGET_CRS	[crs] Default: EPSG:4326	The CRS of the output layer
Resampling method to use	RESAMPLING	[enumeration] Default: 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 Opţional	NODATA	[number] Default: None	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 Opţional	TARGET_RESOLUTION	[number] Default: None	Defines the output file resolution of reprojection result
Additional creation options Opţional	OPTIONS	[string] Default: «»	Pentru adăugarea uneia sau mai multor opțiuni de control la crearea rasterului (ex.: culori, dimensiunea blocului, compresia fișierului…). Pentru ușurință, vă puteți baza pe profiluri predefinite (consultați Secțiunea opțiunilor driver-ului GDAL). For Batch Process: separate multiple options with a pipe character (|).
Output data type	DATA_TYPE	[enumeration] Default: 0	Defines the format of the output raster file. Opţiuni: 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 Opţional	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 Opţional	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] Default: False	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.
Additional command-line parameters Opţional	EXTRA	[string] Default: None	Add extra GDAL command line options.
Reprojected	OUTPUT	[raster] Default: «[Save to temporary file]»	Specification of the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Rezultat

Etichetă	Nume	Tipul	Descriere
Reprojected	OUTPUT	[raster] Default: [Save to temporary file]	Reprojected output raster layer

Python code

Algorithm ID: gdal:warpreproject

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

ID-ul algoritmului se afișează atunci când treceți peste algoritmul din caseta instrumentelor de procesare. Dicționarul parametrilor furnizează valorile și NUMELE parametrilor. Pentru detalii despre rularea algoritmilor de procesare din consola Python, parcurgeți Utilizarea algoritmilor de procesare din consolă.