Actinia — The GRASS GIS REST API

Actinia is an open source REST API for scalable, distributed, high performance processing of geographical data that uses GRASS GIS for computational tasks.

It provides a REST API to process satellite images, time series of satellite images, arbitrary raster data with geographical relations and vector data.

The REST interface allows to access, manage and manipulate the GRASS GIS database via HTTP GET, PUT, POST and DELETE requests and to process raster, vector and time series data located in a persistent GRASS GIS database. Actinia allows the processing of cloud based data, for example all Landsat 4-8 scenes as well as all Sentinel2A scenes in an ephemeral databases. The computational results of ephemeral processing are available via object storage as GeoTIFF files.

The full API documentation is available here: https://actinia.mundialis.de/api_docs/

Examples

Data management

• List all locations that are available in the actinia persistent database:

curl -X GET "https://actinia.mundialis.de/api/v1/locations" -H "authorization: Basic …"

• List all mapsets in the location LL:

curl -X GET "https://actinia.mundialis.de/api/v1/locations/LL/mapsets" -H "authorization: Basic …"

• List all space-time raster datasets (STRDS) in location LL and mapset Sentinel_timeseries:

curl -X GET "https://actinia.mundialis.de/api/v1/locations/LL/mapsets/Sentinel_timeseries/strds" -H "authorization: Basic …"

• List all raster map layers of the STRDS:

curl -X GET "https://actinia.mundialis.de/api/v1/locations/LL/mapsets/Sentinel_timeseries/strds/S2A_B04/raster_layers" -H "authorization: Basic …"

Landsat and Sentinel2A NDVI computation

• Compute the NDVI of the top of athmosphere (TOAR) corrected Landsat4 scene LC80440342016259LGN00:

curl -X POST "https://actinia.mundialis.de/api/v1/landsat_process/LC80440342016259LGN00/TOAR/NDVI" -H "authorization: Basic …"

• NDVI computation of Sentinel2A scene S2A_MSIL1C_20170212T104141_N0204_R008_T31TGJ_20170212T104138:

curl -X POST "https://actinia.mundialis.de/api/v1/sentinel2_process/ndvi/S2A_MSIL1C_20170212T104141_N0204_R008_T31TGJ_20170212T104138" -H "authorization: Basic …"

The results of the asynchronous computations are available as GeoTIFF file in a cloud storage for download.