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Pattern 3

Application Package Pattern 3¶

The CWL includes:

scatter on an input parameter of type Directory[]
one output parameter of type Directory

This scenario typically takes as input a stack of acquisitions, applies an aggregation algorithm and produces a result

Implementation: detect water bodies taking as input a list of Landsat-8/9 acquisitions producing a STAC Catalog with n STAC Items

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Inputs¶

Id	Type	Label	Doc
`aoi`	`string`	area of interest	area of interest as a bounding box
`epsg`	`string`	EPSG code	EPSG code
`bands`	`string[]`	bands used for the NDWI	bands used for the NDWI
`items`	`Directory[]`	Landsat-8/9 acquisition reference	Landsat-8/9 acquisition reference

Steps¶

Id	Runs	Label	Doc
`step`	`#clt`	None	None

Outputs¶

Id	Type	Label	Doc
`water_bodies`	`Directory[]`	Water bodies detected	Water bodies detected based on the NDWI and otsu threshold

Data flow management¶

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Workflow components diagram¶

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Inputs¶

Id	Type	Label	Doc
`aoi`	`string`	area of interest - pattern-3/aoi	area of interest as a bounding box - This parameter is derived from pattern-3/aoi
`epsg`	`string`	EPSG code - pattern-3/epsg	EPSG code - This parameter is derived from pattern-3/epsg
`bands`	`string[]`	bands used for the NDWI - pattern-3/bands	bands used for the NDWI - This parameter is derived from pattern-3/bands
`another_input`	`string`	Another Input - my-asthonishing-stage-in-directory/another_input	An additional input for demonstration purposes - This parameter is derived from my-asthonishing-stage-in-directory/another_input
`items`	`https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI[]`	Landsat-8/9 acquisition reference - pattern-3/items	Landsat-8/9 acquisition reference - This parameter is derived from pattern-3/items
`s3_bucket`	`string`	my-super-stage-out/s3_bucket	This parameter is derived from: my-super-stage-out/s3_bucket
`sub_path`	`string`	my-super-stage-out/sub_path	This parameter is derived from: my-super-stage-out/sub_path
`aws_access_key_id`	`string`	my-super-stage-out/aws_access_key_id	This parameter is derived from: my-super-stage-out/aws_access_key_id
`aws_secret_access_key`	`string`	my-super-stage-out/aws_secret_access_key	This parameter is derived from: my-super-stage-out/aws_secret_access_key
`region_name`	`string`	my-super-stage-out/region_name	This parameter is derived from: my-super-stage-out/region_name
`endpoint_url`	`string`	my-super-stage-out/endpoint_url	This parameter is derived from: my-super-stage-out/endpoint_url

Steps¶

Id	Runs	Label	Doc
`directory_stage_in_0`	`#my-asthonishing-stage-in-directory`	None	None
`app`	`#pattern-3`	None	None
`stage_out_0`	`#my-super-stage-out`	None	None

Outputs¶

Id	Type	Label	Doc
`water_bodies`	`https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI[]`	Water bodies detected	Water bodies detected based on the NDWI and otsu threshold

Execution¶

Inputs¶

{
  "aoi": "-118.985,38.432,-118.183,38.938",
  "epsg": "EPSG:4326",
  "bands": [
    "green",
    "nir08"
  ],
  "items": [
    {
      "class": "https://raw.githubusercontent.com/eoap/schemas/main/url.yaml#URL",
      "value": "https://planetarycomputer.microsoft.com/api/stac/v1/collections/landsat-c2-l2/items/LC08_L2SP_042033_20231007_02_T1"
    },
    {
      "class": "https://raw.githubusercontent.com/eoap/schemas/main/url.yaml#URL",
      "value": "https://planetarycomputer.microsoft.com/api/stac/v1/collections/landsat-c2-l2/items/LC09_L2SP_042033_20231015_02_T1"
    }
  ]
}

Outputs¶

{
    "water_bodies": [
        {
            "value": "s3://my-bucket/my/sub/path-j6hxyq/catalog.json",
            "type": "https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI"
        },
        {
            "value": "s3://my-bucket/my/sub/path-rqscc8/catalog.json",
            "type": "https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI"
        }
    ]
}