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Interface GeoJsonCodecConstructorOptions

Constructor options for GeoJsonCodec.

Hierarchy

  • GeoJsonCodecConstructorOptions

Overview

Properties

Optional generateIDs

generateIDs: boolean | null

When true, the codec will always generate IDs during the decoding step for all the Features. When the Feature has already an ID, the existing ID will be replaced by a generated one. Feature IDs are provided by the GeoJsonCodecConstructorOptions.idProvider mechanism or otherwise they are auto-generated by the internal ID generator.
When false, the codec will never generate IDs. The codec will throw an error whenever a Feature without ID is encountered.
When the flag is not set, or is set to null, the codec will generate IDs only for those Features that are without IDs.

Optional idProvider

idProvider: FeatureIDProvider

Defines a custom callback function to provide IDs for decoded features that come without IDs. The mechanism takes into account the GeoJsonCodecConstructorOptions.generateIDs property. This callback is invoked by LuciadRIA with a decoded feature for which the ID should be returned. When the provided ID is invalid then the feature ID will be auto-generated.

Note: Having features in LuciadRIA with stable IDs that do not change on each query request is important for the performance sake. For example when features do not have intrinsic IDs on each query request then instead of adding/removing only relevant features, all the existing features are removed, and all the new ones are added.

// GeoJsonCodec will use IDs from a feature property.
const codec = new GeoJsonCodec({ idProvider: (feature: Feature) => feature.properties.id });
since

2021.0

Optional mode3D

mode3D: boolean

Setting this property to true will encode Shape instances as 3D GeoJSON geometry and decode GeoJSON geometries as 3D Shapes: if LuciadRIA Point instances have no z coordinate, 0 will be included as a third value in a GeoJSON position. if GeoJSON positions have a third value, it will be set as the z-coordinate in the LuciadRIA Point. By default this is false.

Optional swapAxes

swapAxes: string[]

Indicates whether the codec should swap x and y axes for the specified reference identifier(s) when decoding or encoding features in the GeoJSON format. Normally axes should always be in x,y[,z] order when in GeoJSON, but not all servers follow this rule (depending on the reference system).

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