Annotation

Other than the original MaskRCNN the ROIs are not determined by the pixel coordinates but by geographical coordinates. To annotate ROIs with a specific disease, a GeoJson has to be defined with the respective coordinates. Each annotation has to be in a separate file. They are going to be collected in a FeatureCollection while querying for Sentinel products. The files are saved in datasets.

The ROI Polygon is wrapped in a Feature with additional properties:

Property	Definition
disease	Id (as integer > 0) of the disease. The id needs to be included in datasets/crop-disease/diseases.json as key value pair. Key is the id and value is the name of the disease.
date	Date of the record, formated like yyyyMMdd, yyyy-MM-ddThh:mm:ss.SSSZ (ISO-8601) or yyyy-MM-ddThh:mm:ssZ
incubation	possible time of incubation of the disease - will be used to determine a time frame to look for sentinel products ((date - incubation) to date), formated like DAY(S) (or HOUR(S), MONTH(S), etc.) where n is an integer >= 0

As written in RFC 7946 all GeoJson coordinates use WGS84. It doesn't need to be specified, since the crs member was removed from the GeoJson schema.

Example GeoJson:

{
  "type": "Feature",
  "properties": {
    "disease": 1,
    "incubation": "7DAYS",
    "date": "2018-07-12T13:00:00Z",
    "description": "Foliar diseases 2018"
  },
  "geometry": {
    "type": "Polygon",
    "coordinates": [
      [
        [
          11.17271184667937,
          44.5741222915042
        ],
        [
          11.17327573819044,
          44.57500270977919
        ],
        [
          11.17314419840545,
          44.57503617927283
        ],
        [
          11.17262296000765,
          44.5741695802758
        ],
        [
          11.17271184667937,
          44.5741222915042
        ]
      ]
    ]
  }
}