Feature inheritance

[IanMayo]

EnvironmentTypes: land, surface, subsurface, air
FeatureTypes

CoreFeatureProperties {
dataType
}

SpatialFeatureProperties extends CoreFeatureProperties{
visible: boolean
}

LineFeatureProperties extends SpatialFeatureProperties {
lineColor: string
}

TrackFeatureProperties extends LineFeatureProperties {
name: string
shortName?: string
environment: EnvironmentTypes
timestamps: [string]
labelVisible?:[boolean]
markerVisible?: [boolean]
labelFormat?: [string | null]
}

PointFeatureProperties extends SpatialFeatureProperties {
color: string
symbol: string
time?: string
startTime?: string
endTime?: string
}

Track extends Feature {
properties: TrackFeatureProperties
}