Ráster¶

Descripción¶

Calculate hypsometric curves for features of polygon layer and save them as CSV file for further processing.

Parametros¶

DEM to analyze [raster]

DEM to use for calculating altitudes.

Boundary layer [vector: polygon]

Polygonal vector layer with boundaries of areas used to calculate hypsometric curves.

Paso [number]

Distance between curves.

Por defecto: 100.0

Use % of area instead of absolute value [boolean]

Write area percentage to “Area” field of the CSV file instead of absolute area value.

Predeterminado: False

Salidas¶

Directorio de salida [directory]

Directory where output will be saved. For each feature from input vector layer CSV file with area and altitude values will be created.

File name consists of prefix hystogram_ followed by layer name and feature ID.

Uso de la consola¶

processing.runalg('qgis:hypsometriccurves', input_dem, boundary_layer, step, use_percentage, output_directory)

Ver también¶

Descripción¶

Calculates basic statistics of the raster layer.

Parametros¶

Capa de entrada [raster]

Ráster a analizar.

Salidas¶

Estadísticas [html]

Resultados de análisis en formato HTML.

Valor mínimo [number]

Minimum cell value.

Maximum value [number]

Maximum cell value.

Suma [number]

Sum of all cells values.

Valor medio [number]

Mean cell value.

valid cells count [number]

Number of cells with data.

Cuenta de celdas sin datos [number]

Number of NODATA cells.

Desviación estandar [number]

Standard deviation of cells values.

Uso de la consola¶

processing.runalg('qgis:rasterlayerstatistics', input, output_html_file)

Ver también¶

Descripción¶

Calculates some statistics values for pixels of input raster inside certain zones, defined as polygon layer.

Following values calculated for each zone:

• mínimo

• máximo

• suma

• Número

• media

• desviación estándar

• número de valores únicos

• intervalo

• varianza

Parametros¶

Capa ráster [raster]

Ráster a analizar.

Raster band [number]

Number of raster band to analyze.

Predeterminado: 1

Vector layer containing zones [vector: polygon]

Layer with zones boundaries.

Output column prefix [string]

Prefijo para campos salida.

Predeterminado: _

Cargar todo el ráster en memoria [boolean]

Determines if raster band will be loaded in memory (True) or readed by chunks (False). Useful only when disk IO or raster scanning inefficiencies are your limiting factor.

Por defecto: True

Salidas¶

Capa de salida [vector]

The resulting layer. Basically this is same layer as zones layer with new columns containing statistics added.

Uso de la consola¶

processing.runalg('qgis:zonalstatistics', input_raster, raster_band, input_vector, column_prefix, global_extent, output_layer)

Ver también¶