可選opt_options: GMLOptionsOptional configuration object.
Abstract base class; normally only used for creating subclasses and not instantiated in apps. Feature base format for reading and writing data in the GML format. This class cannot be instantiated, it contains only base content that is shared with versioned format classes ol.format.GML2 and ol.format.GML3.
Classdesc
Abstract base class; normally only used for creating subclasses and not instantiated in apps. Feature base format for reading and writing data in the GML format. This class cannot be instantiated, it contains only base content that is shared with versioned format classes ol.format.GML2 and ol.format.GML3.
參數: opt_options
Optional configuration object.