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Generates an aspect map from any GDAL-supported elevation raster. Aspect is the compass direction that a slope faces. The pixels will have a value from 0-360° measured in degrees from north indicating the azimuth. On the northern hemisphere, the north side of slopes is often shaded (small azimuth from 0°-90°), while the southern side receives more solar radiation (higher azimuth from 180°-270°). The algorithm is derived from the GDAL DEM utility .
The number of a band containing elevation values.
Predeterminado: 1
Genera un raster de pendiente a partir del raster de elevación.
Predeterminado: False
Activates Zevenbergen&Thorne formula for smooth landscapes.
Predeterminado: False
Activating the trigonometric angle results in different categories: 0° (=East), 90° (North), 180° (=West), 270° (=South).
Predeterminado: False
Activating this option will insert a 0-value for the value -9999 on flat areas.
Predeterminado: False
processing.runalg('gdalogr:aspect', input, band, compute_edges, zevenbergen, trig_angle, zero_flat, output)
Generates a color relief map from any GDAL-supported elevation raster. Color reliefs can particularly be used to depict elevations. The Algorithm outputs a 4-band raster with values computed from the elevation and a text-based color configuration file. By default, the colors between the given elevation values are blended smoothly and the result is a nice colorized elevation raster. The algorithm is derived from the GDAL DEM utility .
The number of a band containing elevation values.
Predeterminado: 1
Genera un raster de pendiente a partir del raster de elevación.
Predeterminado: False
The “0,0,0,0” RGBA mode results in color interpolation whereas the Exact color and Nearest color modes avoid interpolation of values that don’t match an index of the color configuration file.
Opciones:
1 — Color exacto
2 — Color más cercano
Predeterminado: 0
processing.runalg('gdalogr:colorrelief', input, band, compute_edges, color_table, match_mode, output)
Fill raster regions with no data values by interpolation from edges. The values for the no-data regions are calculated by the sourrounding pixel values using inverse distance weighting. After the interpolation a smoothing of the results takes placce. Input can be any GDAL-supported raster layer. This algorithm is generally suitable for interpolating missing regions of fairly continuously varying rasters (such as elevation models for instance). It is also suitable for filling small holes and cracks in more irregularly varying images (like airphotos). It is generally not so great for interpolating a raster from sparse point data. The algorithm is derived from the GDAL fillnodata utility .
Capa ráster.
The number of pixels to search in all directions to interpolate from.
Predeterminado: 100
The number of 3x3 filter passes to run (0 or more) to smoothen the results of the interpolation.
Predeterminado: 0
The band to operate on. Nodata values must be represented by the value 0.
Predeterminado: 1
Opcional
Una máscara que define cuáles áreas serán llenadas.
Activates the user-defined validity mask.
Predeterminado: False
Entregar ráster en cualquier formato soportado por GDAL.
processing.runalg('gdalogr:fillnodata', input, distance, iterations, band, mask, no_default_mask, output)
The Moving Average is a simple data averaging algorithm. It uses a moving window of elliptic form to search values and averages all data points within the window. Search ellipse can be rotated by specified angle, the center of ellipse located at the grid node. Also the minimum number of data points to average can be set, if there are not enough points in window, the grid node considered empty and will be filled with specified NODATA value.
Capa vector punto
The first radius (X axis if rotation angle is 0) of search ellipse.
Por defecto: 0.0
The second radius (Y axis if rotation angle is 0) of search ellipse.
Por defecto: 0.0
Minimum number of data points to average. If less amount of points found the grid node considered empty and will be filled with NODATA marker.
Por defecto: 0.0
Angle of ellipse rotation in degrees. Ellipse rotated counter clockwise.
Por defecto: 0.0
Sin marcador de datos para llenar puntos vacíos.
Por defecto: 0.0
Tipo de archivo ráster
Opciones:
5 — Flotante32
Predeterminado: 5
processing.runalg('gdalogr:gridaverage', input, z_field, radius_1, radius_2, min_points, angle, nodata, rtype, output)
Este algoritmo calcula algunas métricas de datos usando la ventana y geometría de grid de salida especificadas.
Capa vector punto
Lista de métricas disponibles:
Opciones:
Predeterminado: 0
The first radius (X axis if rotation angle is 0) of search ellipse. Set this parameter to zero to use whole point array
Por defecto: 0.0
The second radius (Y axis if rotation angle is 0) of search ellipse. Set this parameter to zero to use whole point array
Por defecto: 0.0
Minimum number of data points to use. If less amount of points found the grid node considered empty and will be filled with NODATA marker.
This is only used if search ellipse is set (both radii are non-zero)
Por defecto: 0.0
Angle of search ellipse rotation in degrees (counter clockwise)
Por defecto: 0.0
NODATA marker to fill empty points
Por defecto: 0.0
Tipo de archivo ráster
Opciones:
5 — Flotante32
Predeterminado: 5
Archivo ráster interpolado
processing.runalg('gdalogr:griddatametrics', input, z_field, metric, radius_1, radius_2, min_points, angle, nodata, rtype, output)
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.
Capa vector punto
Capa para la interpolación (Opcional).
Poder de peso
Predeterminado: 2.0
Smoothing parameter
Por defecto: 0.0
The first radius (X axis if rotation angle is 0) of search ellipse
Por defecto: 0.0
The second radius (Y axis if rotation angle is 0) of search ellipse
Por defecto: 0.0
Maximum number of data points to use.
Do not search for more points than this number. If less amount of points found the grid node considered empty and will be filled with NODATA marker
Por defecto: 0.0
Minimum number of data points to use.
If less amount of points found the grid node considered empty and will be filled with NODATA marker
Por defecto: 0.0
Angle of ellipse rotation in degrees.
Ellipse rotated counter clockwise.
Por defecto: 0.0
No data marker to fill empty points
Por defecto: 0.0
Tipo de archivo ráster
Opciones:
5 — Flotante32
Predeterminado: 5
Archivo ráster interpolado
processing.runalg('gdalogr:gridinvdist', input, z_field, power, smothing, radius_1, radius_2, max_points, min_points, angle, nodata, rtype, output)
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.
Capa vector punto
Capa para la interpolación (Opcional).
The first radius (X axis if rotation angle is 0) of search ellipse.
Por defecto: 0.0
The second radius (Y axis if rotation angle is 0) of search ellipse.
Por defecto: 0.0
Angle of ellipse rotation in degrees. Ellipse rotated counter clockwise.
Por defecto: 0.0
Sin marcador de datos para llenar puntos vacíos.
Por defecto: 0.0
Tipo de archivo ráster
Opciones:
5 — Flotante32
Predeterminado: 5
Archivo ráster interpolado
processing.runalg('gdalogr:gridnearestneighbor', input, z_field, radius_1, radius_2, angle, nodata, rtype, output)
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. The algorithm is derived from the GDAL DEM utility .
Band containing the elevation information.
Predeterminado: 1
Genera un raster de pendiente a partir del raster de elevación.
Predeterminado: False
Activates Zevenbergen&Thorne formula for smooth landscapes.
Predeterminado: False
The factor exaggerates the height of the output elevation raster.
Por defecto: 1.0
The ratio of vertical units to horizontal units.
Por defecto: 1.0
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. .
Por defecto: 315.0
Defines the altitude of the light, in degrees. 90 if the light comes from above the elevation raster, 0 if it is raking light.
Por defecto: 45.0
Ráster de salida.
processing.runalg('gdalogr:hillshade', input, band, compute_edges, zevenbergen, z_factor, scale, azimuth, altitude, output)
Convert nearly black/white borders to black.
This utility 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
Select how far from black, white or custom colors the pixel values can be and still considered near black, white or custom color
Predeterminado: 15
Search for nearly white (255) pixels instead of nearly black pixels
Predeterminado: False
processing.runalg('gdalogr:nearblack', input, near, white, output)
The proximity algorithm 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.
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.
Por defecto: (no establecer)
Indicate whether distances generated should be in pixel or georeferenced coordinates.
Opciones:
Predeterminado: 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 in pixels unless distunits GEO is specified
Predeterminado: -1
Specify a nodata value to use for the destination proximity raster
Predeterminado: -1
Specify a value to be applied to all pixels that are within the -maxdist of target pixels (including the target pixels) instead of a distance value
Predeterminado: -1
Tipo de archivo ráster
Opciones:
5 — Flotante32
Predeterminado: 5
processing.runalg('gdalogr:proximity', input, values, units, max_dist, nodata, buf_val, rtype, output)
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. The algorithm is derived from the GDAL DEM utility .
The number of a band containing elevation values.
Predeterminado: 1
Genera un raster de pendiente a partir del raster de elevación.
Predeterminado: False
processing.runalg('gdalogr:roughness', input, band, compute_edges, output)
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. The algorithm is derived from the GDAL sieve utility .
Capa ráster.
Only raster polygons smaller than this size will be removed.
Predeterminado: 2
Either four connectedness or eight connectedness should be used when determining.
Opciones:
Predeterminado: 0
Capa ráster de salida.
processing.runalg('gdalogr:sieve', input, threshold, connections, output)
Generate 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. The algorithm is derived from the GDAL DEM utility .
The number of a band containing elevation values.
Predeterminado: 1
Genera un raster de pendiente a partir del raster de elevación.
Predeterminado: False
Activates Zevenbergen&Thorne formula for smooth landscapes.
Predeterminado: False
You have the option to use slope expressed as degrees.
Predeterminado: False
The ratio of vertical units to horizontal units.
Por defecto: 1.0
ráster de salida de 32-bit decimal.
processing.runalg('gdalogr:slope', input, band, compute_edges, zevenbergen, as_percent, scale, output)
This command 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
The number of a band containing elevation values
Predeterminado: 1
Generates edges from the elevation raster
Predeterminado: False
processing.runalg('gdalogr:tpitopographicpositionindex', input, band, compute_edges, output)
This command 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
The number of a band containing elevation values
Predeterminado: 1
Generates edges from the elevation raster
Predeterminado: False
archivo ráster TRI
processing.runalg('gdalogr:triterrainruggednessindex', input, band, compute_edges, output)