重要

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28.2.4. Raster miscellaneous

28.2.4.1. Build overviews (pyramids)

To speed up rendering time of raster layers overviews (pyramids) can be created. Overviews are lower resolution copies of the data which QGIS uses depending of the level of zoom.

This algorithm is derived from the GDAL addo utility.

Default menu: Raster ► Miscellaneous

参数

Basic parameters

标注

名称

类型

描述

输入图层

INPUT

[栅格]

Input raster layer

Remove all existing overviews

CLEAN

[boolean]

Default: False

Removes existing overviews from the raster. By default these are not removed.

Advanced parameters

标注	名称	类型	描述
Overview levels	`LEVELS`	[string] Default: '2 4 8 16'	Defines the number of overview levels calculated by the original resolution of the input raster layer. By default 4 levels will be taken into consideration.
Resampling method 可选	`RESAMPLING`	[enumeration] Default: 0	Calculates the overviews with a defined resampling method. Possible resampling methods are: 0 -- Nearest Neighbour (`nearest`) 1 -- Average (`average`) 2 -- Gaussian (`gauss`) 3 -- Cubic (4x4 kernel) (`cubic`) 4 -- Cubic B-Spline (4x4 kernel) (`cubicspline`) 5 -- Lanczos (6x6 kernel) (`lanczos`) 6 -- Average MP (`average_mp`) 7 -- Average in Mag/Phase Space (`average_magphase`) 8 -- Mode (`mode`)
Overviews format 可选	`FORMAT`	[enumeration] Default: 0	The overviews can be stored internally, or externally as GTiff or ERDAS Imagine file. By default the overviews are stored in the output raster. Possible formats methods are: 0 -- Internal (if possible) 1 -- External (GTiff .ovr) 2 -- External (ERDAS Imagine .aux)
Additional command-line parameters 可选	`EXTRA`	[string] Default: None	Add extra GDAL command line options

输出

标注	名称	类型	描述
Pyramidized	`OUTPUT`	[栅格]	Output raster layer with overviews

Python代码

Algorithm ID: gdal:overviews

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.2. Build virtual raster 

Builds a VRT (Virtual Dataset) that is a mosaic of the list of input GDAL-supported rasters. With a mosaic you can merge several raster files.

This algorithm is derived from the GDAL buildvrt utility.

Default menu: Raster ► Miscellaneous

参数

Basic parameters

标注	名称	类型	描述
Input layers	`INPUT`	[raster] [list]	GDAL-supported raster layers.
Resolution	`RESOLUTION`	[enumeration] Default: 0	The output resolution of the mosaic. By default the average resolution of the raster files will be chosen. Options: 0 --- Average (`average`) 1 --- Highest (`highest`) 2 --- Lowest (`lowest`)
Place each input file into a separate band	`SEPARATE`	[boolean] Default: False	With 'True' you can define that each raster file goes into a separated stacked band in the VRT band.
Allow projection difference	`PROJ_DIFFERENCE`	[boolean] Default: False	Allows that the output bands have different projections derived from the projection of the input raster layers.
Virtual	`OUTPUT`	[栅格] 默认: `[保存到临时文件]`	Specification of the output raster layer. One of: 保存到临时文件保存到文件…

Advanced parameters

标注	名称	类型	描述
Add alpha mask band to VRT when source raster has none	`ADD_ALPHA`	[boolean] Default: False	Adds an alpha mask band to the VRT when the source raster has none.
Override projection for the output file 可选	`ASSIGN_CRS`	[crs] Default: None	Overrides the projection for the output file. No reprojection is done.
Resampling algorithm	`RESAMPLING`	[enumeration] Default: 0	The resampling algorithm to use. Options: 0 --- Nearest Neighbour (`nearest`) 1 --- Bilinear (2x2 kernel) (`bilinear`) 2 --- Cubic (4x4 kernel) (`cubic`) 3 --- Cubic B-Spline (4x4 kernel) (`cubicspline`) 4 --- Lanczos (6x6 kernel) (`lanczos`) 5 --- Average (`average`) 6 --- Mode (`mode`)
NoData value(s) for input bands (space separated) 可选	`SRC_NODATA`	[string] Default: None	Space separated NoData value(s) for input band(s)
Additional command-line parameters	`EXTRA`	[string] Default: None	Add extra GDAL command line options

输出

标注	名称	类型	描述
Virtual	`OUTPUT`	[栅格]	Output raster layer

Python代码

Algorithm ID: gdal:buildvirtualraster

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.3. gdal2tiles 

Generates a directory with small tiles and metadata, following the OSGeo Tile Map Service Specification. See also the OpenGIS Web Map Tile Service Implementation Standard. Simple web pages with viewers based on Google Maps, OpenLayers and Leaflet are generated as well. To explore your maps on-line in the web browser, you only need to upload the generated directory onto a web server.

This algorithm also creates the necessary metadata for Google Earth (KML SuperOverlay), in case the supplied map uses EPSG:4326 projection.

ESRI world files and embedded georeferencing is used during tile generation, but you can publish a picture without proper georeferencing too.

This algorithm is derived from the GDAL gdal2tiles utility.

参数

Basic parameters

标注	名称	类型	描述
输入图层	`INPUT`	[栅格]	GDAL-supported raster layer.
Tile cutting profile	`PROFILE`	[enumeration] Default: 0	One of: 0 --- Mercator (`mercator`) 1 --- Geodetic (`geodetic`) 2 --- Raster (`raster`)
Zoom levels to render 可选	`ZOOM`	[string] Default: ''
Web viewer to generate	`VIEWER`	[enumerate] Default: 0	One of: 0 --- All (`all`) 1 --- GoogleMaps (`google`) 2 --- OpenLayers (`openlayers`) 3 --- Leaflet (`leaflet`) 4 --- None (`none`)
Title of the map 可选	`TITLE`	[string] Default: ''
Copyright of the map	`COPYRIGHT`	[string] Default: ''
Output directory	`OUTPUT`	[folder] Default: `[Save to temporary folder]`	Specify the output folder for the tiles. One of: Save to a Temporary Directory Save to Directory

Advanced parameters

标注	名称	类型	描述
Resampling method	`RESAMPLING`	[enumeration] Default: 0	The resampling algorithm to use. Options: 0 --- Average (`average`) 1 --- Nearest Neighbour (`near`) 2 --- Bilinear (2x2 kernel) (`bilinear`) 3 --- Cubic (4x4 kernel) (`cubic`) 4 --- Cubic B-Spline (4x4 kernel) (`cubicspline`) 5 --- Lanczos (6x6 kernel) (`lanczos`) 6 --- Antialias (`antialias`)
The spatial reference system used for the source input data 可选	`SOURCE_CRS`	[crs] Default: None
Transparency value to assign to the input data 可选	`NODATA`	[数字] Default: 0.0
URL address where the generated tiles are going to be published 可选	`URL`	[string] Default: ''
Google Maps API key (http://code.google.com/apis/maps/signup.html) 可选	`GOOGLE_KEY`	[string] Default: ''	Your Google maps API key.
Bing Maps API key (https://www.bingmapsportal.com/) 可选	`BING_KEY`	[string] Default: ''	Your Bing maps API key.
Generate only missing files	`RESUME`	[boolean] Default: False
Generate KML for Google Earth	`KML`	[boolean] Default: False
Avoid automatic generation of KML files for EPSG:4326	`NO_KML`	[boolean] Default: False

输出

标注	名称	类型	描述
Output directory	`OUTPUT`	[folder]	The output folder (for the tiles)

Python代码

Algorithm ID: gdal:gdal2tiles

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.4. Merge 

Merges raster files in a simple way. Here you can use a pseudocolor table from an input raster and define the output raster type. All the images must be in the same coordinate system.

This algorithm is derived from the GDAL merge utility.

Default menu: Raster ► Miscellaneous

参数

Basic parameters

标注	名称	类型	描述
Input layers	`INPUT`	[raster] [list]	Input raster layers
Grab pseudocolor table from first layer	`PCT`	[boolean] Default: False	The pseudocolor table from the first layer will be used for the coloring
Place each input file into a separate band	`SEPARATE`	[boolean] Default: False	Place each input file into a separate band
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the format of the output raster file. Options: 0 --- Byte (Eight bit unsigned integer (quint8)) 1 --- Int16 (Sixteen bit signed integer (qint16)) 2 --- UInt16 (Sixteen bit unsigned integer (quint16)) 3 --- UInt32 (Thirty two bit unsigned integer (quint32)) 4 --- Int32 (Thirty two bit signed integer (qint32)) 5 --- Float32 (Thirty two bit floating point (float)) 6 --- Float64 (Sixty four bit floating point (double)) 7 --- CInt16 (Complex Int16) 8 --- CInt32 (Complex Int32) 9 --- CFloat32 (Complex Float32) 10 --- CFloat64 (Complex Float64) 11 --- Int8 (Eight bit signed integer (qint8)) Available options depend on the GDAL version built with QGIS (see Help ► About menu)
Merged	`OUTPUT`	[栅格] 默认: `[保存到临时文件]`	Specification of the output raster layer. One of: 保存到临时文件保存到文件…

Advanced parameters

标注	名称	类型	描述
Input pixel value to treat as "NoData" 可选	`NODATA_INPUT`	[数字] Default: None	Ignores pixels from files being merged in with this pixel value
Assign specified "NoData" value to output 可选	`NODATA_OUTPUT`	[数字] Default: None	Assigns the specified NoData value to output bands.
Additional creation options 可选	`OPTIONS`	[string] Default: ''	For adding one or more creation options that control the raster to be created (colors, block size, file compression...). For convenience, you can rely on predefined profiles (see GDAL driver options section). Batch Process and Model Designer: separate multiple options with a pipe character (`\|`).
Additional command-line parameters	`EXTRA`	[string] Default: None	Add extra GDAL command line options

输出

标注	名称	类型	描述
Merged	`OUTPUT`	[栅格]	Output raster layer

Python代码

Algorithm ID: gdal:merge

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.5. Pansharpening 

Performs a pan-sharpening operation. It can create a "classic" output dataset (such as GeoTIFF), or a VRT dataset describing the pan-sharpening operation.

See GDAL Pansharpen.

参数

Basic parameters

标注

名称

类型

描述

Spectral dataset

SPECTRAL

[栅格]

Input (spectral) raster layer

Panchromatic dataset

PANCHROMATIC

[栅格]

Input (panchromatic) raster layer

Output

OUTPUT

[栅格]

默认: [保存到临时文件]

Specify the output (sharpened) raster layer. One of:

保存到临时文件
保存到文件…

Advanced parameters

标注

名称

类型

描述

Resampling algorithm

RESAMPLING

[enumeration]

Default: 2

The resampling algorithm to use. Options:

0 --- Nearest Neighbour (nearest)
1 --- Bilinear (2x2 kernel) (bilinear)
2 --- Cubic (4x4 kernel) (cubic)
3 --- Cubic B-Spline (4x4 kernel) (cubicspline)
4 --- Lanczos (6x6 kernel) (lanczos)
5 --- Average (average)

Additional creation options

可选

OPTIONS

[string]

Default: ''

For adding one or more creation options that control the raster to be created (colors, block size, file compression...). For convenience, you can rely on predefined profiles (see GDAL driver options section).

Batch Process and Model Designer: separate multiple options with a pipe character (|).

Additional command-line parameters

可选

EXTRA

[string]

Default: None

Add extra GDAL command line options

输出

标注	名称	类型	描述
Output	`OUTPUT`	[栅格]	Output (sharpened) raster layer

Python代码

Algorithm ID: gdal:pansharp

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.6. Raster calculator 

Command line raster calculator with numpy syntax. Use any basic arithmetic supported by numpy arrays, such as +, -, *, and / along with logical operators, such as >. Note that all input rasters must have the same dimensions, but no projection checking is performed.

See the GDAL Raster Calculator utility docs.

参见

Raster calculator, Raster calculator (virtual)

参数

Basic parameters

标注	名称	类型	描述
Input layer A	`INPUT_A`	[栅格]	First input raster layer (mandatory)
Number of raster band for A	`BAND_A`	[raster band]	Band for input layer A (mandatory)
Input layer B 可选	`INPUT_B`	[栅格] Default: None	Second input raster layer
Number of raster band for B 可选	`BAND_B`	[raster band]	Band for input layer B
Input layer C 可选	`INPUT_C`	[栅格] Default: None	Third input raster layer
Number of raster band for C 可选	`BAND_C`	[raster band]	Band for input layer C
Input layer D 可选	`INPUT_D`	[栅格] Default: None	Fourth input raster layer
Number of raster band for D 可选	`BAND_D`	[raster band]	Band for input layer D
Input layer E 可选	`INPUT_E`	[栅格] Default: None	Fifth input raster layer
Number of raster band for E 可选	`BAND_E`	[raster band]	Band for input layer E
Input layer F 可选	`INPUT_F`	[栅格]	Sixth input raster layer
Number of raster band for F 可选	`BAND_F`	[raster band] Default: None	Band for input layer F
*Calculation in gdalnumeric syntax using +-/ or any numpy array functions (i.e. logical_and())**	`FORMULA`	[string] Default: ''	The calculation formula. Examples: `A(A>0)` --- outputs the value of the raster A if the value of A is greater than 0. If not, outputs 0. `A(A>0 and A>B)`--- outputs the value of A if that value is bigger than 0 and bigger than the value of B. If not, outputs 0. `Alogical_or(A<=177,A>=185)` --- outputs the value of A if A <= 177 or A >= 185. If not, outputs 0. `sqrt(AA+B*B)` --- Outputs the square root of the sum of the value of A squared and the value of B squared.
Set output NoData value 可选	`NO_DATA`	[数字] Default: None	Value to use for NoData
Handling of extent differences	`EXTENT_OPT`	[enumeration] Default: 0	Determines how to handle rasters with different extents. Only available with GDAL 3.3+. Supported options are: 0 --- Ignore 1 --- Fail 2 --- Union 3 --- Intersect
Output extent 可选	`INPUT`	[extent]	Custom extent of the output raster. Only available with GDAL 3.3+. Available methods are: Calculate from layer…: uses extent of a layer loaded in the current project Calculate from layout map…: uses extent of a layout map item in the active project Calculate from bookmark…: uses extent of a saved bookmark Use map canvas extent Draw on canvas: click and drag a rectangle delimiting the area to take into account Enter the coordinates as `xmin, xmax, ymin, ymax`
Output raster type	`RTYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 --- Byte (Eight bit unsigned integer (quint8)) 1 --- Int16 (Sixteen bit signed integer (qint16)) 2 --- UInt16 (Sixteen bit unsigned integer (quint16)) 3 --- UInt32 (Thirty two bit unsigned integer (quint32)) 4 --- Int32 (Thirty two bit signed integer (qint32)) 5 --- Float32 (Thirty two bit floating point (float)) 6 --- Float64 (Sixty four bit floating point (double)) 7 --- CInt16 (Complex Int16) 8 --- CInt32 (Complex Int32) 9 --- CFloat32 (Complex Float32) 10 --- CFloat64 (Complex Float64) 11 --- Int8 (Eight bit signed integer (qint8)) Available options depend on the GDAL version built with QGIS (see Help ► About menu)
Calculated	`OUTPUT`	[栅格] 默认: `[保存到临时文件]`	Specify the output (calculated) raster layer. One of: 保存到临时文件保存到文件…

Advanced parameters

标注

名称

类型

描述

Additional creation options

可选

OPTIONS

[string]

Default: ''

For adding one or more creation options that control the raster to be created (colors, block size, file compression...). For convenience, you can rely on predefined profiles (see GDAL driver options section).

Batch Process and Model Designer: separate multiple options with a pipe character (|).

Additional command-line parameters

可选

EXTRA

[string]

Default: ''

Add extra GDAL command line options

输出

标注	名称	类型	描述
Calculated	`OUTPUT`	[栅格]	Output (calculated) raster layer

Python代码

Algorithm ID: gdal:rastercalculator

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.7. Raster information 

The gdalinfo program lists various information about a GDAL supported raster dataset.

This algorithm is derived from the GDAL info utility.

Default menu: Raster ► Miscellaneous

参数

Basic parameters

标注	名称	类型	描述
输入图层	`INPUT`	[栅格]	Input raster layer
Force computation of the actual min/max values for each band	`MIN_MAX`	[boolean] Default: False	Forces computation of the actual min/max values for each band in the dataset
Read and display image statistics (force computation if necessary)	`STATS`	[boolean] Default: False	Reads and displays image statistics. Forces computation if no statistics are stored in an image.
Suppress GCP info	`NO_GCP`	[boolean] Default: False	Suppresses ground control points list printing. It may be useful for datasets with huge amount of GCPs, such as L1B AVHRR or HDF4 MODIS which contain thousands of them.
Suppress metadata info	`NO_METADATA`	[boolean] Default: False	Suppresses metadata printing. Some datasets may contain a lot of metadata strings.
Layer information	`OUTPUT`	[html] 默认: `[保存到临时文件]`	Specify the HTML file for output. One of: 保存到临时文件保存到文件…

Advanced parameters

标注

名称

类型

描述

Additional command-line parameters

可选

EXTRA

[string]

Default: None

Add extra GDAL command line options

输出

标注	名称	类型	描述
Layer information	`OUTPUT`	[html]	The HTML file containing information about the input raster layer

Python代码

Algorithm ID: gdal:gdalinfo

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.8. Retile 

Retiles a set of input tiles. All the input tiles must be georeferenced in the same coordinate system and have a matching number of bands. Optionally pyramid levels are generated.

This algorithm is derived from the GDAL Retile utility.

参数

Basic parameters

标注	名称	类型	描述
Input files	`INPUT`	[raster] [list]	The input raster files
Tile width	`TILE_SIZE_X`	[数字] Default: 256	Width of the tiles in pixels (minimum 0)
Tile height	`TILE_SIZE_Y`	[数字] Default: 256	Height of the tiles in pixels (minimum 0)
Overlap in pixels between consecutive tiles	`OVERLAP`	[数字] Default: 0
Number of pyramid levels to build	`LEVELS`	[数字] Default: 1	Minimum: 0
Output directory	`OUTPUT`	[folder] Default: `[Save to temporary folder]`	Specify the output folder for the tiles. One of: Save to a Temporary Directory Save to Directory
CSV file containing the tile(s) georeferencing information	`OUTPUT_CSV`	[file] Default: `[Skip output]`	Specify the output file for the tiles. One of: Skip Output 保存到临时文件保存到文件…

Advanced parameters

标注	名称	类型	描述
Source coordinate reference system 可选	`SOURCE_CRS`	[crs] Default: None
Resampling method	`RESAMPLING`	[enumeration] Default: 0	The resampling algorithm to use. Options: 0 --- Nearest Neighbour (`nearest`) 1 --- Bilinear (2x2 kernel) (`bilinear`) 2 --- Cubic (4x4 kernel) (`cubic`) 3 --- Cubic B-Spline (4x4 kernel) (`cubicspline`) 4 --- Lanczos (6x6 kernel) (`lanczos`)
Column delimiter used in the CSV file 可选	`DELIMITER`	[string] Default: ';'	Delimiter to use in the CSV file containing the tile(s) georeferencing information
Additional creation options 可选	`OPTIONS`	[string] Default: ''	For adding one or more creation options that control the raster to be created (colors, block size, file compression...). For convenience, you can rely on predefined profiles (see GDAL driver options section). Batch Process and Model Designer: separate multiple options with a pipe character (`\|`).
Additional command-line parameters 可选	`EXTRA`	[string] Default: ''	Add extra GDAL command line options
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the format of the output raster file. Options: 0 --- Byte (Eight bit unsigned integer (quint8)) 1 --- Int16 (Sixteen bit signed integer (qint16)) 2 --- UInt16 (Sixteen bit unsigned integer (quint16)) 3 --- UInt32 (Thirty two bit unsigned integer (quint32)) 4 --- Int32 (Thirty two bit signed integer (qint32)) 5 --- Float32 (Thirty two bit floating point (float)) 6 --- Float64 (Sixty four bit floating point (double)) 7 --- CInt16 (Complex Int16) 8 --- CInt32 (Complex Int32) 9 --- CFloat32 (Complex Float32) 10 --- CFloat64 (Complex Float64) 11 --- Int8 (Eight bit signed integer (qint8)) Available options depend on the GDAL version built with QGIS (see Help ► About menu)
Build only the pyramids	`ONLY_PYRAMIDS`	[boolean] Default: False
Use separate directory for each tile row	`DIR_FOR_ROW`	[boolean] Default: False

输出

标注	名称	类型	描述
Output directory	`OUTPUT`	[folder]	The output folder for the tiles.
CSV file containing the tile(s) georeferencing information	`OUTPUT_CSV`	[file]	The CSV file with georeferencing information for the tiles.

Python代码

Algorithm ID: gdal:retile

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.9. Tile index 

Builds a vector layer with a record for each input raster file, an attribute containing the filename, and a polygon geometry outlining the raster. This output is suitable for use with MapServer as a raster tileindex.

This algorithm is derived from the GDAL Tile Index utility.

Default menu: Raster ► Miscellaneous

参数

Basic parameters

标注	名称	类型	描述
Input files	`LAYERS`	[raster] [list]	The input raster files. Can be multiple files.
Field name to hold the file path to the indexed rasters	`PATH_FIELD_NAME` Optional	[string] Default: 'location'	The output field name to hold the file path/location to the indexed rasters.
Store absolute path to the indexed rasters	`ABSOLUTE_PATH`	[boolean] Default: False	Set whether the absolute path to the raster files is stored in the tile index file. By default the raster filenames will be put in the file exactly as they are specified in the command.
Skip files with different projection reference	`PROJ_DIFFERENCE`	[boolean] Default: False	Only files with same projection as files already inserted in the tile index will be inserted. Default does not check projection and accepts all inputs.
Tile index	`OUTPUT`	[vector: polygon] 默认: `[保存到临时文件]`	Specify the polygon vector layer to write the index to. One of: 保存到临时文件保存到文件…

Advanced parameters

标注

名称

类型

描述

Transform geometries to the given CRS

可选

TARGET_CRS

[crs]

Geometries of input files will be transformed to the specified target coordinate reference system. Default creates simple rectangular polygons in the same coordinate reference system as the input rasters.

The name of the field to store the SRS of each tile

可选

CRS_FIELD_NAME

[string]

The name of the field to store the SRS of each tile

The format in which the CRS of each tile must be written

CRS_FORMAT

[enumeration]

Default: 0

Format for the CRS. One of:

0 -- Auto (AUTO)
1 -- Well-known text (WKT)
2 -- EPSG (EPSG)
3 -- Proj.4 (PROJ)

输出

标注	名称	类型	描述
Tile index	`OUTPUT`	[vector: polygon]	The polygon vector layer with the tile index.

Python代码

Algorithm ID: gdal:tileindex

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

28.2.4.10. Viewshed 

Calculates a viewshed raster from an input raster DEM using method defined in Wang2000 for a user defined point.

参数

Basic parameters

标注	名称	类型	描述
输入图层	`INPUT`	[栅格]	Input elevation raster layer
Band number	`BAND`	[raster band] Default: 1	The number of the band to use as elevation
Observer location	`OBSERVER`	[point]	The location of the observer
Observer height	`OBSERVER_HEIGHT`	[数字] 默认值：1.0	The altitude of the observer, in the DEM units
Target height	`TARGET_HEIGHT`	[数字] 默认值：1.0	The altitude of the target element, in the DEM units
Maximum distance from observer to compute visibility	`MAX_DISTANCE`	[数字] Default: 100.0	Maximum distance from observer to compute visibility, in the DEM units
Output	`OUTPUT`	[栅格] 默认: `[保存到临时文件]`	Output raster layer. One of: 保存到临时文件保存到文件…

Advanced parameters

标注

名称

类型

描述

Additional creation options

可选

OPTIONS

[string]

Default: ''

For adding one or more creation options that control the raster to be created (colors, block size, file compression...). For convenience, you can rely on predefined profiles (see GDAL driver options section).

Batch Process and Model Designer: separate multiple options with a pipe character (|).

Additional command-line parameters

EXTRA

[string]

Default: None

Add extra GDAL command line options

输出

标注	名称	类型	描述
Output	`OUTPUT`	[栅格]	The raster layer displaying the viewshed.

Python代码

Algorithm ID: gdal:viewshed

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

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。