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GRASS GIS in the cloud: actinia geoprocessing

Office Desk

"bring algorithm to the data"

exploit GRASS GIS
functionality via
HTTP REST API

GRaaS
GRASS as a Service



REST API on top
GET /locations 
{
  "locations": [
    "latlong_wgs84",
    "ECAD",
    "nc_spm_08"
  ],
  "status": "success"
}
GET /locations/nc_spm_08/mapsets 
...
"process_log": [
  {
    "executable": "g.mapsets",
    "id": "1",
    "parameter": [
      "separator=newline",
      "-l"
    ],
    "return_code": 0,
    "run_time": 0.10045695304870605,
    "stderr": [
      "Available mapsets:",
      ""
    ],
    "stdout": "PERMANENT\nlandsat\nmodis_lst\n"
  }
],
"process_results": [
  "PERMANENT",
  "landsat",
  "modis_lst"
],
...
GET /locations/nc_spm_08/mapsets/PERMANENT/raster_layers 
...
"process_results": [
  "aspect",
  "basin_50K",
  "boundary_county_500m",
  "elev_lid792_1m",
  "elev_ned_30m",
  "elev_srtm_30m",
  "elev_state_500m",
  "elevation",
  "elevation_shade",
  "towns",
  ...
  "urban",
  "zipcodes",
  "zipcodes_dbl"
],
...
GET /locations/nc_spm_08/mapsets/PERMANENT/raster_layers/elevation/render
User defined processing
  • ephemeral
  • persistent
Create custom process chains by chaining the processing tools provided by actinia:
  • GRASS modules
  • importer/exporter
  • python scripts
  • cmd (GDAL, PROJ, snappy)
  • ...
POST /locations/nc_spm_08/processing_async_export
POST /locations/nc_spm_08/mapsets/my_new_mapset/processing_async

{
    "list": [
      {
        "module": "r.slope.aspect",
        "id": "r_slope_aspect_1",
        "inputs": [
          {
            "param": "elevation",
            "value": "elev_ned_30m@PERMANENT"
          }
        ],
        "outputs": [
          {
            "export": {
              "format": "GTiff",
              "type": "raster"
            },
            "param": "slope",
            "value": "elev_ned_30m_slope"
          }
        ],
        "flags": "a"
      }
    ],
    "version": "1"
}

1) --> curl -X POST -u myuser:mypassword -d @${PROCESS_CHAIN} \
    -H 'Content-Type: application/json' \
    https://actinia.mundialis.de/api/v3/locations/nc_spm_08/processing_async_export

JSON with status <-- 2)


3) --> poll status


JSON with resource URLs <-- 4)


5) --> GET resources from URLs

"bring algorithm to the data"
  • via predefined functionalities
  • via Importer (/Exporter)
e.g. Sentinel data (S-1 and S-2) processing with single band access
  • Download from ESA API hub
  • from local storage (as provided by DIAS platforms)
  • Amazon AWS
  • Google Cloud Storages
  • ...
curl -X POST -u myuser:mypassword -d @${PROCESS_CHAIN} \
    -H 'Content-Type: application/json' \
    https://actinia.mundialis.de/api/v3/sentinel2_process/ndvi/
    S2B_MSIL1C_20190630T090559_N0207_R050_T35TMK_20190630T113444
## More features - ace (actinia command execution via GRASS GIS) - advanced usage with GRASS addons - openEO support - openeo-grassgis-driver converts processing requests (process graphs) into actinia jobs. The openEO core API (https://openeo.org; H2020 project) is a standardized interface supporting multiple backends. - STAC support - Keycloak integration - Process chain templating - ...
## Outlook - enhanced STAC support - combined usage of tiling- and parallel plugin - automatisation of actinia worker startup - more sophisticated job queues and message queues in general - restructure in smaller pieces / microservices - OGC API processes ? - ...

Thank You!
Questions?

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