Oil Spill root element for a generic Oil Spill observation or prediction Oil Spill feature description Unique identifier of the Oil Spill event. For predicted Oil Spills this refers to the observed Oil Spill originating the prediction. Observation origin The center of the Oil Spill expressed as a gml:pos in lat/lon coordinates This is an array of geometries (to allow for the description of many slicks in the same oil spill). In case of just one slick, this element will be made of a single gml geometry element. Any valid gml geoemtry element could be used but preferred structure is: gml:Polygon/gml:exterior/gml:LinearRing/gml:posList Extension attributes of individual slicks has to be specified exploiting the optional element gml:metaDataProperty of gml:Polygon. Specifically the gml:metaDataProperty element is expected to host a csn:extension element. The date and time of the observation/prediction expressed in ISO8601 format (e.g. '2003-04-01T13:01:02' ) Who provided the observation/prediction Extension parameters of the Oil Spill Region and country classification Approximate distance from nearest coastline. Valid keywords for free-text search The unique identifier of the original EO image(s) used to identify the Oil Spill The probability/confidence that this is a real Oil Spill. Expressed as a number in the [0,1] range. Referring to the A/B classification used in the CSNDC, 0 stands for 'B' and 1 stands for 'A' Oil type and age information References (as URI) to auxiliary data , images, etc. The csn:auxiliaryData element contains an open structure to accomodate any additional file including oil spill clip images. For a clip image, the ./csn:dataKey element is set to ' OS_CLIP_IMAGE' and the ./csn:dataReference element is set to the file name of the clip image file. Possible sources for the OS In Situ validation information Sea and wind information associated to the oil spill Events that can be put in relation with this one Extension and shape parameters associated with the Oil Spill Area of the Oil Spill expressed as m2. Length of the Oil Spil expressed as m Width of the Oil Spil expressed as m Shape of slick aligned with track Orientation of the Oil Spil Volume of the Oil Spill in m3 Thickness of the Oil Spill in mm Composition and age parameters associated with the Oil Spill Composition of the Oil Sub type of Oil Age of Oil in days Array of auxiliary data related to the Oil Spill (for example images) Auxiliary data related to the Oil Spill. E.g. the link to an image or other file Key/identifier of a specific auxiliary data URI references to auxiliary data Descripton of auxiliary data Source of the observed spill EO Image identifier in which the spill is observed EO Sensor Type Array of ad-hoc analysis metadata. Container for ad-hoc analysis information. The 'parameter' describes the name of the attribute/parameter. For example, Shape_characteristics, Contrast_characteristics, Edge_characteristics... Container for ad-hoc analysys information. The 'value' describes the value of the attribute (see 'parameter'). Container for ad-hoc analysys information. The 'description' describes in human readable text the meaning and the unit of measure of the attribute (see 'parameter'). This is optional. A number from 0 to 1 to specify the relative (percentage) importance of the parameter in determining the classification of the Oil Spill. This is optional. In Situ validation specifying if Oil Spill presence has been verified In Situ validation body: who actually verified the OS presence Free text for notes and observations In Situ validation specifying if Oil Spill presence has been verified in facts Observation origin of the Oil Spill. It could be EXPECTED meaning that the presence of the Oil Spill is expected as part of a test dataset or insitu independent observation, or DETECTED meaning that the presence of the Oil Spill has been actually detected by the original EO image classification. It is predicted when it comes from a DTOS prediction service. Wind condition associated to the area of the spill Wind intensity expressed in meters/second Wind direction expressed as [0,360] deegree value where 0=360=Geographical North, clockwise. Following the nautical habit, this is intended as the direction from which the wind is flowing. Sea condition associated to the area of spill Height of the waves expressed in meters Length of the waves expressed in meters Direction of the waves expressed as [0,360] deegree value where 0=360=Geographical North, clockwise Intensity of the current expressed in meters/second Direction of the current expressed as [0,360] deegree value where 0=360=Geographical North, clockwise. Following the nautical habit, this is intended as the direction toward which the current is flowing. Value of Oil Spill spatial area quantity. Uses the AreaType with the restriction that the unit of measure referenced by uom must be square meters Linear length of spill's perimeter. Uses the LengthType with the restriction that the unit of measure referenced by uom must be meters Orientation of Oil Spill Classification of OS location in terms of countries Country Other events to be put in relation with this one Relative importance of a parameter in determining the oil spill classification. It is the percentage weight of the parameter in classifying the oil spill expressed as a number in the 0 (not used) to 1 (most important) range.