Análise Raster¶

Aspecto
Cor do relevo
Preencher sem dados
Grid (Data metrics)
Grid (IDW with nearest neighbor searching)
Grid (Inverse distance to a power)
Grid (Linear)
Grid (média móvel)
Grid (Nearest neighbor)
Sombreados
Near black
Proximity (raster distance)
Roughness
Sieve
Declives (ângulos)
Terrain Ruggedness Index (TRI)
Topographic Position Index (TPI)

Aspecto ¶

Gera um mapa de aspecto de qualquer elevação raster suportada pelo GDAL. Aspecto é a direção da bússola que um declive enfrenta. Os píxels terão um valor de 0-360° medidos em graus a partir do norte indicando o azimute. No hemisfério norte, o lado norte dos declives é frequentemente sombreado (pequeno azimute de 0-90°), enquanto o lado sul recebe mais radiação solar (azimute maior de 180-270°).

This algorithm is derived from the GDAL DEM utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input elevation raster layer
Band number	`BAND`	[raster band] Default: 1	The number of the band to use as elevation
Return trigonometric angle instead of azimuth	`TRIG_ANGLE`	[boolean] Default: False	Activating the trigonometric angle results in different categories: 0° (East), 90° (North), 180° (West), 270° (South).
Return 0 for flat instead of -9999	`ZERO_FLAT`	[boolean] Default: False	Ativando esta opção será inserido um valor 0 para o valor -9999 em áreas planas.
Compute edges	`COMPUTE_EDGES`	[boolean] Default: False	Generates edges from the elevation raster
Use Zevenbergen&Thorne formula instead of the Horn’s one	`ZEVENBERGEN`	[boolean] Default: False	Activates Zevenbergen&Thorne formula for smooth landscapes
Additional creation options Opcional	`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).
Aspect	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Aspect	`OUTPUT`	[raster]	Output raster with angle values in degrees

Cor do relevo ¶

Gera um mapa de relevo colorido a partir de qualquer elevação raster suportada pelo GDAL. Os relevos coloridos podem ser usados particularmente para retratar elevações. A saída do algoritmo produz uma imagem raster de 4 bandas com valores calculados a partir da elevação e um arquivo de configuração de cor baseado em texto. Por padrão, as cores entre os valores de elevação fornecidos são combinadas suavemente e o resultado é uma boa imagem raster com elevação colorida.

This algorithm is derived from the GDAL DEM utility .

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input elevation raster layer
Band number	`BAND`	[raster band] Default: 1	The number of the band to use as elevation
Compute edges	`COMPUTE_EDGES`	[boolean] Default: False	Generates edges from the elevation raster
Color configuration file	`COLOR_TABLE`	[file]	A text-based color configuration file
Matching mode	`MATCH_MODE`	[enumeration] Default: 2	One of: 0 — Use strict color matching 1 — Use closest RGBA quadruples 2 — Use smoothly blended colours
Additional creation options Opcional	`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).
Color relief	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Color relief	`OUTPUT`	[raster]	A 4-band output raster

Preencher sem dados ¶

Preencha as regiões de raster com sem valores de dados por interpolação das bordas. Os valores para as regiões sem dados são calculados pelos valores de píxels ao redor usando ponderação pelo inverso da distância. Após a interpolação uma suavização dos resultados ocorre. A entrada pode ser qualquer camada raster suportada pelo GDAL. Esse algoritmo é geralmente adequado para interpolar regiões ausentes de rasters de variação bastante contínua (como modelos de elevação por exemplo). Também é adequado para preencher pequenos buracos e rachaduras em imagens com variações mais irregulares (como fotos aéreas). Geralmente não é tão bom em interpolar um raster de dados pontuais esparsos.

This algorithm is derived from the GDAL fillnodata utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input raster layer
Band number	`BAND`	[raster band] Default: 1	A banda para operar. Sem valores de dados deve ser representado pelo valor 0.
Maximum distance (in pixels) to search out for values to interpolate	`DISTANCE`	[number] Default: 10	The number of pixels to search in all directions to find values to interpolate from
Number of smoothing iterations to run after the interpolation	`ITERATIONS`	[number] Default: 0	O número de filtros 3x3 passa a ser executado (0 ou mais) para suavizar os resultados da interpolação.
Do not use default validity mask for the input band	`NO_MASK`	[boolean] Default: False	Activates the user-defined validity mask
Validity mask	`MASK_LAYER`	[raster]	A raster layer that defines the areas to fill.
Filled	`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.

Saídas¶

Label	Nome	Type	Descrição
Filled	`OUTPUT`	[raster]	Output raster

Grid (Data metrics)¶

Computes some data metrics using the specified window and output grid geometry.

This algorithm is derived from the GDAL grid utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Ver também

GDAL grid tutorial

Parâmetros¶

Label	Nome	Type	Descrição
Point layer	`INPUT`	[vector: point]	Input point vector layer
Data metric to use	`METRIC`	[enumeration] Default: 0	One of: 0 — Minimum, minimum value found in grid node search ellipse 1 — Maximum, maximum value found in grid node search ellipse 2 — Range, a difference between the minimum and maximum values found in grid node search ellipse 3 — Count, a number of data points found in grid node search ellipse 4 — Average distance, an average distance between the grid node (center of the search ellipse) and all of the data points found in grid node search ellipse 5 — Average distance between points, an average distance between the data points found in grid node search ellipse. The distance between each pair of points within ellipse is calculated and average of all distances is set as a grid node value
The first radius of search ellipse	`RADIUS_1`	[number] Default: 0.0	The first radius (X axis if rotation angle is 0) of the search ellipse
The second radius of search ellipse	`RADIUS_2`	[number] Default: 0.0	The second radius (Y axis if rotation angle is 0) of the search ellipse
Angle of search ellipse rotation in degrees (counter clockwise)	`ANGLE`	[number] Default: 0.0	Ângulo de rotação da elipse em graus. A elipse é rotacionada no sentido horário.
Minimum number of data points to use	`MIN_POINTS`	[number] Default: 0.0	Número mínimo de pontos de dados para calcular a média. Se a quantia de pontos encontrada é baixa o nó da grid é considerado vazio e será preenchido com o marcador SEM DADOS.
Nodata	`NODATA`	[number] Default: 0.0	No data marker to fill empty points
Z value from field Opcional	`Z_FIELD`	[tablefield: numeric]	Field for the interpolation
Additional creation options Opcional	`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).
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 — Byte 1 — Int16 2 — UInt16 3 — UInt32 4 — Int32 5 — Float32 6 — Float64 7 — CInt16 8 — CInt32 9 — CFloat32 10 — CFloat64
Interpolated (data metrics)	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer with interpolated values. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Interpolated (data metrics)	`OUTPUT`	[raster]	Output raster with interpolated values

Grid (IDW with nearest neighbor searching)¶

Computes the Inverse Distance to a Power gridding combined to the nearest neighbor method. Ideal when a maximum number of data points to use is required.

This algorithm is derived from the GDAL grid utility .

Ver também

GDAL grid tutorial

Parâmetros¶

Label	Nome	Type	Descrição
Point layer	`INPUT`	[vector: point]	Input point vector layer
Weighting power	`POWER`	[number] Default: 2.0	Weighting power
Smoothing	`SMOOTHING`	[number] Default: 0.0	Smoothing parameter
The radius of the search circle	`RADIUS`	[number] Default: 1.0	The radius of the search circle
Maximum number of data points to use	`MAX_POINTS`	[number] Default: 12	Do not search for more points than this number.
Minimum number of data points to use	`MIN_POINTS`	[number] Default: 0	Número mínimo de pontos de dados para calcular a média. Se a quantia de pontos encontrada é baixa o nó da grid é considerado vazio e será preenchido com o marcador SEM DADOS.
Nodata	`NODATA`	[number] Default: 0.0	No data marker to fill empty points
Z value from field Opcional	`Z_FIELD`	[tablefield: numeric]	Field for the interpolation
Additional creation options Opcional	`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).
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 — Byte 1 — Int16 2 — UInt16 3 — UInt32 4 — Int32 5 — Float32 6 — Float64 7 — CInt16 8 — CInt32 9 — CFloat32 10 — CFloat64
Interpolated (IDW with NN search)	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer with interpolated values. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Interpolated (IDW with NN search)	`OUTPUT`	[raster]	Output raster with interpolated values

Grid (Inverse distance to a power)¶

The Inverse Distance to a Power gridding method is a weighted average interpolator.

You should supply the input arrays with the scattered data values including coordinates of every data point and output grid geometry. The function will compute interpolated value for the given position in output grid.

This algorithm is derived from the GDAL grid utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Ver também

GDAL grid tutorial

Parâmetros¶

Label	Nome	Type	Descrição
Point layer	`INPUT`	[vector: point]	Input point vector layer
Weighting power	`POWER`	[number] Default: 2.0	Weighting power
Smothing	`SMOOTHING`	[number] Default: 0.0	Smoothing parameter
The first radius of search ellipse	`RADIUS_1`	[number] Default: 0.0	The first radius (X axis if rotation angle is 0) of the search ellipse
The second radius of search ellipse	`RADIUS_2`	[number] Default: 0.0	The second radius (Y axis if rotation angle is 0) of the search ellipse
Angle of search ellipse rotation in degrees (counter clockwise)	`ANGLE`	[number] Default: 0.0	Ângulo de rotação da elipse em graus. A elipse é rotacionada no sentido horário.
Maximum number of data points to use	`MAX_POINTS`	[number] Default: 0	Do not search for more points than this number.
Minimum number of data points to use	`MIN_POINTS`	[number] Default: 0	Número mínimo de pontos de dados para calcular a média. Se a quantia de pontos encontrada é baixa o nó da grid é considerado vazio e será preenchido com o marcador SEM DADOS.
Nodata	`NODATA`	[number] Default: 0.0	No data marker to fill empty points
Z value from field Opcional	`Z_FIELD`	[tablefield: numeric]	Field for the interpolation
Additional creation options Opcional	`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).
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 — Byte 1 — Int16 2 — UInt16 3 — UInt32 4 — Int32 5 — Float32 6 — Float64 7 — CInt16 8 — CInt32 9 — CFloat32 10 — CFloat64
Interpolated (IDW)	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer with interpolated values. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Interpolated (IDW)	`OUTPUT`	[raster]	Output raster with interpolated values

Grid (Linear)¶

The Linear method perform linear interpolation by computing a Delaunay triangulation of the point cloud, finding in which triangle of the triangulation the point is, and by doing linear interpolation from its barycentric coordinates within the triangle. If the point is not in any triangle, depending on the radius, the algorithm will use the value of the nearest point or the NODATA value.

This algorithm is derived from the GDAL grid utility .

Parâmetros¶

Label	Nome	Type	Descrição
Point layer	`INPUT`	[vector: point]	Input point vector layer
Search distance	`RADIUS`	[number] Default: -1.0	In case the point to be interpolated does not fit into a triangle of the Delaunay triangulation, use that maximum distance to search a nearest neighbour, or use nodata otherwise. If set to `-1`, the search distance is infinite. If set to `0`, no data value will be used.
Nodata	`NODATA`	[number] Default: 0.0	No data marker to fill empty points
Z value from field Opcional	`Z_FIELD`	[tablefield: numeric]	Field for the interpolation
Additional creation options Opcional	`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).
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 — Byte 1 — Int16 2 — UInt16 3 — UInt32 4 — Int32 5 — Float32 6 — Float64 7 — CInt16 8 — CInt32 9 — CFloat32 10 — CFloat64
Interpolated (Linear)	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer with interpolated values. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Interpolated (Linear)	`OUTPUT`	[raster]	Output raster with interpolated values

Grid (média móvel)¶

A média móvel é um algoritmo simples que calcula a média de dados. Ele usa uma janela móvel de formato elíptico para procurar valores e calcular a média de todos os pontos de dados dentro da janela. A elipse de pesquisa pode ser rotacionada por um ângulo especificado, o centro da elipse localizado no nó da grid. Além disso, o número mínimo de pontos de dados para a média pode ser definido, se não houver pontos suficientes na janela, o nó da grid é considerado vazio e será preenchido com o valor SEM DADOS especificado.

This algorithm is derived from the GDAL grid utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Ver também

GDAL grid tutorial

Parâmetros¶

Label	Nome	Type	Descrição
Point layer	`INPUT`	[vector: point]	Input point vector layer
The first radius of search ellipse	`RADIUS_1`	[number] Default: 0.0	The first radius (X axis if rotation angle is 0) of the search ellipse
The second radius of search ellipse	`RADIUS_2`	[number] Default: 0.0	The second radius (Y axis if rotation angle is 0) of the search ellipse
Angle of search ellipse rotation in degrees (counter clockwise)	`ANGLE`	[number] Default: 0.0	Ângulo de rotação da elipse em graus. A elipse é rotacionada no sentido horário.
Minimum number of data points to use	`MIN_POINTS`	[number] Default: 0.0	Número mínimo de pontos de dados para calcular a média. Se a quantia de pontos encontrada é baixa o nó da grid é considerado vazio e será preenchido com o marcador SEM DADOS.
Nodata	`NODATA`	[number] Default: 0.0	No data marker to fill empty points
Z value from field Opcional	`Z_FIELD`	[tablefield: numeric]	Field for the interpolation
Additional creation options Opcional	`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).
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 — Byte 1 — Int16 2 — UInt16 3 — UInt32 4 — Int32 5 — Float32 6 — Float64 7 — CInt16 8 — CInt32 9 — CFloat32 10 — CFloat64
Interpolated (moving average)	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Interpolated (moving average)	`OUTPUT`	[raster]	Output raster with interpolated values

Grid (Nearest neighbor)¶

The Nearest Neighbor method doesn’t perform any interpolation or smoothing, it just takes the value of nearest point found in grid node search ellipse and returns it as a result. If there are no points found, the specified NODATA value will be returned.

This algorithm is derived from the GDAL grid utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Ver também

GDAL grid tutorial

Parâmetros¶

Label	Nome	Type	Descrição
Point layer	`INPUT`	[vector: point]	Input point vector layer
The first radius of search ellipse	`RADIUS_1`	[number] Default: 0.0	The first radius (X axis if rotation angle is 0) of the search ellipse
The second radius of search ellipse	`RADIUS_2`	[number] Default: 0.0	The second radius (Y axis if rotation angle is 0) of the search ellipse
Angle of search ellipse rotation in degrees (counter clockwise)	`ANGLE`	[number] Default: 0.0	Ângulo de rotação da elipse em graus. A elipse é rotacionada no sentido horário.
Nodata	`NODATA`	[number] Default: 0.0	No data marker to fill empty points
Z value from field Opcional	`Z_FIELD`	[tablefield: numeric]	Field for the interpolation
Additional creation options Opcional	`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).
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 — Byte 1 — Int16 2 — UInt16 3 — UInt32 4 — Int32 5 — Float32 6 — Float64 7 — CInt16 8 — CInt32 9 — CFloat32 10 — CFloat64
Interpolated (Nearest neighbour)	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer with interpolated values. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Interpolated (Nearest neighbour)	`OUTPUT`	[raster]	Output raster with interpolated values

Sombreados ¶

Outputs a raster with a nice shaded relief effect. It’s very useful for visualizing the terrain. You can optionally specify the azimuth and altitude of the light source, a vertical exaggeration factor and a scaling factor to account for differences between vertical and horizontal units.

This algorithm is derived from the GDAL DEM utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input Elevation raster layer
Band number	`BAND`	[raster band] Default: 1	Band containing the elevation information
Z factor (vertical exaggeration)	`Z_FACTOR`	[number] Default: 1.0	The factor exaggerates the height of the output elevation raster
Scale (ratio of vert. units to horiz.)	`SCALE`	[number] Default: 1.0	The ratio of vertical units to horizontal units
Azimuth of the light	`AZIMUTH`	[number] Default: 315.0	Defines the azimuth of the light shining on the elevation raster in degrees. If it comes from the top of the raster the value is 0, if it comes from the east it is 90 a.s.o.
Altitude of the light	`ALTITUDE`	[number] Default: 45.0	Defines the altitude of the light, in degrees. 90 if the light comes from above the elevation raster, 0 if it is raking light.
Compute edges	`COMPUTE_EDGES`	[boolean] Default: False	Generates edges from the elevation raster
Use Zevenbergen&Thorne formula (instead of the Horn’s one)	`ZEVENBERGEN`	[boolean] Default: False	Activates Zevenbergen&Thorne formula for smooth landscapes
Combined shading	`COMBINED`	[boolean] Default: False
Multidirectional shading	`MULTIDIRECTIONAL`	[boolean] Default: False
Additional creation options Opcional	`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).
Hillshade	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer with interpolated values. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Hillshade	`OUTPUT`	[raster]	Output raster with interpolated values

Near black ¶

Converts nearly black/white borders to black.

This algorithm will scan an image and try to set all pixels that are nearly or exactly black, white or one or more custom colors around the collar to black or white. This is often used to “fix up” lossy compressed airphotos so that color pixels can be treated as transparent when mosaicking.

This algorithm is derived from the GDAL nearblack utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input Elevation raster layer
How far from black (white)	`NEAR`	[number] Default: 15	Select how far from black, white or custom colors the pixel values can be and still considered near black, white or custom color.
Search for nearly white pixels instead of nearly black	`WHITE`	[boolean] Default: False	Search for nearly white (255) pixels instead of nearly black pixels
Additional creation options Opcional	`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).
Nearblack	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Nearblack	`OUTPUT`	[raster]	Output raster

Proximity (raster distance)¶

Generates a raster proximity map indicating the distance from the center of each pixel to the center of the nearest pixel identified as a target pixel. Target pixels are those in the source raster for which the raster pixel value is in the set of target pixel values.

This algorithm is derived from the GDAL proximity utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input Elevation raster layer
Band number	`BAND`	[raster band] Default: 1	Band containing the elevation information
A list of pixel values in the source image to be considered target pixels Opcional	`VALUES`	[string] Default: ‘’	A list of target pixel values in the source image to be considered target pixels. If not specified, all non-zero pixels will be considered target pixels.
Distance units	`UNITS`	[enumeration] Default: 1	Indicate whether distances generated should be in pixel or georeferenced coordinates. One of: 0 — Georeferenced coordinates 1 — Pixel coordinates
The maximum distance to be generated Opcional	`MAX_DISTANCE`	[number] Default: 0.0	The maximum distance to be generated. The nodata value will be used for pixels beyond this distance. If a nodata value is not provided, the output band will be queried for its nodata value. If the output band does not have a nodata value, then the value 65535 will be used. Distance is interpreted according to the value of Distance units.
Value to be applied to all pixels that are within the maxdist of target pixels Opcional	`REPLACE`	[number] Default: 0.0	Specify a value to be applied to all pixels that are closer than the maximum distance from target pixels (including the target pixels) instead of a distance value.
Nodata value to use for the destination proximity raster Opcional	`NODATA`	[number] Default: 0.0	Specify the nodata value to use for the output raster
Output data type	`DATA_TYPE`	[enumeration] Default: 5	Defines the data type of the output raster file. Options: 0 — Byte 1 — Int16 2 — UInt16 3 — UInt32 4 — Int32 5 — Float32 6 — Float64 7 — CInt16 8 — CInt32 9 — CFloat32 10 — CFloat64
Additional creation options Opcional	`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).
Proximity map	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Proximity map	`OUTPUT`	[raster]	Output raster

Roughness ¶

Outputs a single-band raster with values computed from the elevation. Roughness is the degree of irregularity of the surface. It’s calculated by the largest inter-cell difference of a central pixel and its surrounding cell. The determination of the roughness plays a role in the analysis of terrain elevation data, it’s useful for calculations of the river morphology, in climatology and physical geography in general.

This algorithm is derived from the GDAL DEM utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input elevation raster layer
Band number	`BAND`	[raster band] Default: 1	The number of the band to use as elevation
Compute edges	`COMPUTE_EDGES`	[boolean] Default: False	Generates edges from the elevation raster
Additional creation options Opcional	`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).
Roughness	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Roughness	`OUTPUT`	[raster]	Single-band output roughness raster. The value -9999 is used as nodata value.

Sieve ¶

Removes raster polygons smaller than a provided threshold size (in pixels) and replaces them with the pixel value of the largest neighbour polygon. It is useful if you have a large amount of small areas on your raster map.

This algorithm is derived from the GDAL sieve utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input elevation raster layer
Threshold	`THRESHOLD`	[number] Default: 10	Only raster polygons smaller than this size will be removed
Use 8-connectedness	`EIGHT_CONNECTEDNESS`	[boolean] Default: False	Use eight connectedness instead of four connectedness
Do not use the default validity mask for the input band	`NO_MASK`	[boolean] Default: False
Validity mask Opcional	`MASK_LAYER`	[raster]	Validity mask to use instead of the default
Sieved	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Sieved	`OUTPUT`	[raster]	Output raster layer.

Declives (ângulos)¶

Generates a slope map from any GDAL-supported elevation raster. Slope is the angle of inclination to the horizontal. You have the option of specifying the type of slope value you want: degrees or percent slope.

This algorithm is derived from the GDAL DEM utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input Elevation raster layer
Band number	`BAND`	[raster band] Default: 1	Band containing the elevation information
Ratio of vertical units to horizontal	`SCALE`	[number] Default: 1.0	The ratio of vertical units to horizontal units
Slope expressed as percent (instead of degrees)	`AS_PERCENT`	[boolean] Default: False	Express slope as percent instead of degrees
Compute edges	`COMPUTE_EDGES`	[boolean] Default: False	Generates edges from the elevation raster
Use Zevenbergen&Thorne formula (instead of the Horn’s one)	`ZEVENBERGEN`	[boolean] Default: False	Activates Zevenbergen&Thorne formula for smooth landscapes
Additional creation options Opcional	`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).
Slope	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Slope	`OUTPUT`	[raster]	Output raster

Terrain Ruggedness Index (TRI)¶

Outputs a single-band raster with values computed from the elevation. TRI stands for Terrain Ruggedness Index, which is defined as the mean difference between a central pixel and its surrounding cells.

This algorithm is derived from the GDAL DEM utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input elevation raster layer
Band number	`BAND`	[raster band] Default: 1	The number of the band to use as elevation
Compute edges	`COMPUTE_EDGES`	[boolean] Default: False	Generates edges from the elevation raster
Additional creation options Opcional	`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).
Terrain Ruggedness Index	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Terrain Ruggedness Index	`OUTPUT`	[raster]	Output ruggedness raster. The value -9999 is used as nodata value.

Topographic Position Index (TPI)¶

Outputs a single-band raster with values computed from the elevation. TPI stands for Topographic Position Index, which is defined as the difference between a central pixel and the mean of its surrounding cells.

This algorithm is derived from the GDAL DEM utility .

“Menu padrão”: seleção menu: ‘Raster –> Análise’

Parâmetros¶

Label	Nome	Type	Descrição
Input layer	`INPUT`	[raster]	Input elevation raster layer
Band number	`BAND`	[raster band] Default: 1	The number of the band to use for elevation values
Compute edges	`COMPUTE_EDGES`	[boolean] Default: False	Generates edges from the elevation raster
Additional creation options Opcional	`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).
Terrain Ruggedness Index	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specify the output raster layer. One of: Save to a Temporary File Save to File… The file encoding can also be changed here.

Saídas¶

Label	Nome	Type	Descrição
Terrain Ruggedness Index	`OUTPUT`	[raster]	Output raster.