OptionalspatialThe spatial reference can be defined using a well-known ID (WKID) or well-known text (WKT).
OptionalxmaxA numeric value indicating the top-right X-coordinate of an extent envelope.
OptionalxminA numeric value indicating the bottom-left X-coordinate of an extent envelope.
OptionalymaxA numeric value indicating the top-right Y-coordinate of an extent envelope.
OptionalyminA numeric value indicating the bottom-left Y-coordinate of an extent envelope.
This object defines the bounding geometry given the lower-left and upper-right corners of the bounding box. A spatial reference is also required. See https://developers.arcgis.com/web-map-specification/objects/envelope_geometry/ https://developers.arcgis.com/web-map-specification/objects/extent/ https://developers.arcgis.com/web-scene-specification/objects/extent/.