pattern-2

Repository: https://github.com/eoap/application-package-patterns

Version: 2.0.0

License: {'@type': 's:CreativeWork', 's:identifier': 'Apache-2.0', 's:name': 'Apache License 2.0', 's:url': 'https://spdx.org/licenses/Apache-2.0.html'}

Author: Lois Lane (lois.lane@meoga.com)

Author: Clark Kent (clark.kent@meoga.com)

Water bodies detection based on NDWI and the otsu threshold

Water bodies detection based on NDWI and otsu threshold applied to a pair of Landsat-8/9 acquisitions

Inputs

Name	Type	Description
aoi	`#BBox`	area of interest as a bounding box
epsg	`#CRS`	EPSG code
bands	`#SpectralBand[]`	bands used for the NDWI
item_1	`Directory`	Landsat-8/9 acquisition reference
item_2	`Directory`	Landsat-8/9 acquisition reference

Outputs

Name	Type	Description
water_bodies	`Directory`	Water bodies detected based on the NDWI and otsu threshold

Type `https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI`

name: https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI
type: record
fields:
- name: value
  type: string

Type `#BBox`

name: '#BBox'
type: record
fields:
- name: bbox
  type:
    type: array
    items: double
- name: crs
  type: string

Type `#SpectralBand`

name: '#SpectralBand'
type: enum
symbols:
- red
- green
- blue
- nir
- nir08
- swir16
- swir22

Type `#CRS`

name: '#CRS'
type: enum
symbols:
- '4326'
- '3857'
- '32610'
- '32611'
- native

Type `#VegetationIndex`

name: '#VegetationIndex'
type: enum
symbols:
- ndvi
- ndwi
- none

clt

application-package-patterns: clt.

Inputs

Name	Type	Description
item_1	`Directory`	item 1.
item_2	`Directory`	item 2.
aoi	`#BBox`	aoi.
epsg	`#CRS`	epsg.
band	`[{'type': 'array', 'items': '#SpectralBand', 'inputBinding': {'prefix': '--band'}}]`	band.

Outputs

Name	Type	Description
stac-catalog	`Directory`	stac catalog.

Type `https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI`

name: https://raw.githubusercontent.com/eoap/schemas/main/string_format.yaml#URI
type: record
fields:
- name: value
  type: string

Type `#BBox`

name: '#BBox'
type: record
fields:
- name: bbox
  type:
    type: array
    items: double
- name: crs
  type: string

Type `#SpectralBand`

name: '#SpectralBand'
type: enum
symbols:
- red
- green
- blue
- nir
- nir08
- swir16
- swir22

Type `#CRS`

name: '#CRS'
type: enum
symbols:
- '4326'
- '3857'
- '32610'
- '32611'
- native

Type `#VegetationIndex`

name: '#VegetationIndex'
type: enum
symbols:
- ndvi
- ndwi
- none

Run the wrapped pattern

The application uses local File/Directory ports. eoap-cwlwrap converts these to typed URI references and composes the locked mastering staging artifacts, using immutable GHCR container digests. Configure PATTERNS_S3_ENDPOINT for your S3 service.

python scripts/run-acceptance.py --case pattern-2

The typed application inputs are:

{
  "aoi": {
    "bbox": [
      -118.985,
      38.432,
      -118.183,
      38.938
    ],
    "crs": "CRS84"
  },
  "epsg": "4326",
  "bands": [
    "green",
    "nir08"
  ],
  "item_1": {
    "value": "https://planetarycomputer.microsoft.com/api/stac/v1/collections/landsat-c2-l2/items/LC08_L2SP_042033_20231007_02_T1"
  },
  "item_2": {
    "value": "https://planetarycomputer.microsoft.com/api/stac/v1/collections/landsat-c2-l2/items/LC09_L2SP_042033_20231015_02_T1"
  }
}

The acceptance runner adds S3 credentials, bucket and a unique publication prefix. It verifies returned STAC links and georeferenced raster assets against the actual area of interest.