Eric
Water bodies detection Application Package deployment and execution on a Platform¶
Eric deploys the application package on a Platform
Application Package deployment¶
Eric get Alice's Application Package latest release from releases
Eric uses curl to submit a POST request to an OGC API Processes endpoint to deploy the Application Package with:
curl --location --request POST 'https://myades.com/eric/wps3/processes' \
--header 'Content-Type: application/json' \
--data-raw '{
"executionUnit": {
"href": "https://github.com/Terradue/ogc-eo-application-package-hands-on/releases/download/1.1.6/app-water-bodies.1.1.6.cwl#water_bodies",
"type": "application/cwl"
}
}'
The output is:
{
"id": "water_bodies-1_1_6",
"title": "Water bodies detection based on NDWI and otsu threshold",
"description": "Water bodies detection based on NDWI and otsu threshold",
"mutable": true,
"version": "1.1.6",
"outputTransmission": [
"value",
"reference"
],
"jobControlOptions": [
"async-execute"
],
"links": [
{
"rel": "http://www.opengis.net/def/rel/ogc/1.0/execute",
"type": "application/json",
"title": "Execute End Point",
"href": "/eric/wps3/processes/water_bodies-1_1_6/execution"
}
]
}
The platform exposes an OGC API Processes processing service. Eric can check the newly deployed OCG API Processes process description:
curl --location --request GET 'http://myades.com/eoepca/wps3/processes/water_bodies-1_1_6' \
--header 'Content-Type: application/json'
The output newly deployed OCG API Processes process description:
{
"id": "water_bodies-1_1_6",
"title": "Water bodies detection based on NDWI and otsu threshold",
"description": "Water bodies detection based on NDWI and otsu threshold",
"mutable": true,
"version": "1.1.6",
"outputTransmission": [
"value",
"reference"
],
"jobControlOptions": [
"async-execute"
],
"links": [
{
"rel": "http://www.opengis.net/def/rel/ogc/1.0/execute",
"type": "application/json",
"title": "Execute End Point",
"href": "/eoepca/wps3/processes/water_bodies-1_1_6/execution"
}
],
"inputs": {
"aoi": {
"title": "area of interest",
"description": "area of interest as a bounding box",
"schema": {
"type": "string",
"default": "Any value"
}
},
"epsg": {
"title": "EPSG code",
"description": "EPSG code",
"schema": {
"type": "string",
"default": "Any value"
}
},
"stac_items": {
"title": "Sentinel-2 STAC items",
"description": "list of Sentinel-2 COG STAC items",
"maxOccurs": 999,
"schema": {
"type": "string",
"default": "Any value"
}
}
},
"outputs": {
"wf_outputs": {
"title": "wf_outputs",
"extended-schema": {
"oneOf": [
{
"allOf": [
{
"$ref": "http://zoo-project.org/dl/link.json"
},
{
"type": "object",
"properties": {
"type": {
"enum": [
"application/json"
]
}
}
}
]
},
{
"type": "object",
"required": [
"value"
],
"properties": {
"value": {
"oneOf": [
{
"type": "object"
}
]
}
}
}
]
},
"schema": {
"oneOf": [
{
"type": "object"
}
]
}
}
}
}
Process execution¶
Eric uses the input dataset with two Sentinel-2 acquisitions:
| Acquisitions | ||
|---|---|---|
| Date | 2021-07-13 | 2022-05-24 |
| URL | S2B_10TFK_20210713_0_L2A | S2A_10TFK_20220524_0_L2A |
| Quicklook |  |
|
Eric uses curl to submit an execution request:
curl --location --request POST 'http://myades.com/eoepca/wps3/processes/water_bodies-1_1_6/execution' \
--header 'Content-Type: application/json' \
--header 'Prefer: respond-async' \
--data-raw '{
"inputs": {
"stac_items": [
"https://earth-search.aws.element84.com/v0/collections/sentinel-s2-l2a-cogs/items/S2B_10TFK_20210713_0_L2A",
"https://earth-search.aws.element84.com/v0/collections/sentinel-s2-l2a-cogs/items/S2A_10TFK_20220524_0_L2A"
],
"aoi": "-121.399,39.834,-120.74,40.472",
"epsg": "EPSG:4326"
}
}'
The response includes a Location header with the url to the get status call of the job:
Location: /eric/wps3/jobs/f2a94e0e-967c-11ed-9857-623b8349c04f
Using the above location header url, Eric monitors the status the submitted job.
curl --location --request GET 'http://myades.com/eric/wps3/jobs/f2a94e0e-967c-11ed-9857-623b8349c04f'
The output is:
{
"progress": 50,
"jobID": "f2a94e0e-967c-11ed-9857-623b8349c04f",
"status": "running",
"message": "running",
"links": [
{
"title": "Status location",
"rel": "status",
"type": "application/json",
"href": "/eric/wps3/jobs/f2a94e0e-967c-11ed-9857-623b8349c04f"
}
]
}
Once the job is completed, Eric uses curl to check the result:
curl --location --request GET 'http://myades.com/eric/wps3/jobs/f2a94e0e-967c-11ed-9857-623b8349c04f/results' \
The output is:
{
"s3_catalog_output": "s3://processing-results/wf-f2a94e0e-967c-11ed-9857-623b8349c04f/catalog.json",
}