Outdated version of the documentation. Find the latest one here.

GDAL Verschiedenes

Virtuelles Raster generieren

Beschreibung

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. The algorithm is derived from the GDAL buildvrt utility .

Parameter

Eingabelayer [multipleinput: rasters]

Von GDAL-unterstütztes Raster.

Auflösung [selection]

The output resolution of the mosaic. By default the average resolution of th raster files will be chosen.

Optionen:

  • 0 — average
  • 1 — highest
  • 2 — lowest

Vorgabe: 0

Layerstapel [boolean]

With ‘False’ you can define that each raster file goes into a separated stacked band in the VRT band.

Vorgabe: True

Unterschiedliche Projektionen zulassen [boolean]

Allows that the output bands have different projections derived from the projection of the input raster layers.

Vorgabe: False

Ausgaben

Ausgaberaster [raster]

Ausgaberasterdatei.

Verwendung der Konsole

processing.runalg('gdalogr:buildvirtualraster', input, resolution, separate, proj_difference, output)

Siehe auch

Verschmelzen

Beschreibung

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. The algorithm is derived from the GDAL merge utility .

Parameter

Eingabelayer [multipleinput: rasters]

Eingaberasterlayer.

Pseudofarbtabelle aus erstem Bild entnehmen [boolean]

The pseudocolor table from the first layer will be used for the coloring.

Vorgabe: False

Layerstapel [boolean]

If ‘True’ is chosen each input file will be placed into a separate stacked band.

Vorgabe: False

Ausgaberastertyp [selection]

Defines the output raster type. By default this will be ‘Float23’.

Optionen:

  • 0 — Byte
  • 1 — Int16
  • 2 — UInt16
  • 3 — UInt32
  • 4 — Int32
  • 5 — Float32
  • 6 — Float64
  • 7 — CInt16
  • 8 — CInt32
  • 9 — CFloat32
  • 10 — CFloat64

Vorgabe: 5

Ausgaben

Ausgaberaster [raster]

Ausgaberasterlayer

Verwendung der Konsole

processing.runalg('gdalogr:merge', input, pct, separate, rtype, output)

Siehe auch

Übersichten erzeugen (Pyramiden)

Beschreibung

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. The algorithm is derived from the GDAL addo utility .

Parameter

Eingabelayer [raster]

Eingaberasterlayer.

Übersichtsebenen [string]

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.

Vorgabe: 2 4 8 16

Alle Übersichten entfernen [boolean]

Removes existing overviews from the raster. By default these aren’t removed.

Vorgabe: False

Abtastmethode [selection]

Calculates the overviews with a defined resampling method.

Optionen:

  • 0 — nearest
  • 1 — average
  • 2 — gauss
  • 3 — cubic
  • 4 — average_mp
  • 5 — average_magphase
  • 6 — mode

Vorgabe: 0

Übersichtsformat [selection]

The overviews can be stored internally, or externally as GTiff or ERDAS Imagine file. By default the overviews are stored in the output raster.

Optionen:

  • 0 — Intern (wenn möglich)

  • 1 — Extern (GTiff .ovr)

  • 2 — Extern (ERDAS Imagine .aux)

Vorgabe: 0

Ausgaben

Ausgaberaster [raster]

Ausgaberasterlayer mit Übersichten.

Verwendung der Konsole

processing.runalg('gdalogr:overviews', input, levels, clean, resampling_method, format)

Siehe auch

Information

Beschreibung

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

Parameter

Eingabelayer [raster]
Raster layer in input
Paßpunktinformation unterdrücken [boolean]

Suppress 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.

Vorgabe: False

Paßpunktinformation unterdrücken [boolean]

Suppress metadata printing. Some datasets may contain a lot of metadata strings.

Vorgabe: False

Ausgaben

Layerinformation [html]
Raster information in output

Verwendung der Konsole

processing.runalg('gdalorg:rasterinfo', input, nogcp, nometadata, output)

Siehe auch

GDAL Info

Kachelindex

Beschreibung

This tool builds a shapefile 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.

Parameter

Eingabelayer [multipleinput: rasters]
The input raster files. Can be multiple files.
Kachelindexfeld [string]

Optional.

The output field name to hold the file path/location to the indexed rasters.

Vorgabe: location

Dateien mit anderer Projektion überspringen [boolean]

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.

Vorgabe: False

Ausgaben

Ausgabelayer [vector]
The name of the output file to create/append to. The default shapefile will be created if it doesn’t already exist, otherwise it will append to the existing file.

Verwendung der Konsole

processing.runalg('gdalogr:tileindex', input, field_name, proj_difference, output)

Siehe auch