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openeo-addons

openEO related GRASS GIS addons (see https://github.com/Open-EO/openeo-grassgis-driver)

Installation

mkdir -p /src/grass_plugins/openeo-addons
grass --tmp-location EPSG:4326 --exec g.extension url=/src/grass_plugins/openeo-addons/r.scaleminmax extension=r.scaleminmax
grass --tmp-location EPSG:4326 --exec g.extension url=/src/grass_plugins/openeo-addons/t.rast.resample extension=t.rast.resample

Overview

  • g.region.bbox: sets the region from a bounding box and CRS for that bbox
  • r.scaleminmax: rescales a raster map to new min, max values
  • t.rast.bandcalc: performs spatio-temporal mapcalc expressions using different bands in a given STRDS
  • t.rast.filterbands: extract selected bands from a given STRDS
  • t.rast.hants: applies HANTS to a space time raster dataset
  • t.rast.mask: Mask a STRDS with another STRDS
  • t.rast.ndvi: calculates NDVI from a given STRDS
  • t.rast.oeapply: Preserve semantic labels in t.rast.mapcalc
  • t.rast.renamelabels: Rename semantic labels in a given STRDS
  • t.rast.resample: applies a resampling method to each map in a space time raster dataset
  • t.rast.udf: applies a user defined function (UDF) to aggregate a time series into a single output raster map
  • t.rast2strds: creates a new strds from an existing raster and an existing strds
  • v.in.geojson: imports a GeoJSON object

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t.rast.ndvi: Allow user to specify nir and red band names

Currently, t.rast.ndvi tries to find out the band names for nir and red automatically:

red_band = None
nir_band = None
if sensor_abbr is not None:
if sensor_abbr == "L5":
red_band = "L5_3"
nir_band = "L5_4"
elif sensor_abbr == "L7":
red_band = "L7_3"
nir_band = "L7_4"
elif sensor_abbr == "L8":
red_band = "L8_4"
nir_band = "L8_5"
elif sensor_abbr == "S2":
red_band = "S2_4"
nir_band = "S2_8"
if red_band is None:
grass.warning("Assuming 'red' and 'nir as band names in %s" % _input)
red_band = "red"
nir_band = "nir"

As we have now flexible band names in GRASS GIS available and to support the ndvi process of openEO, it would be good to have the band names as input parameters. This could then be passed directly from the openEO process graph:
https://github.com/Open-EO/openeo-grassgis-driver/blob/81595797ab5d1df1953a99eb61c2531375ab7146/src/openeo_grass_gis_driver/actinia_processing/ndvi_process.py#L96-L107

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