Optionalalias?: string[]Optionalepsg?: string | numberEPSG of the projection, for example: "EPSG:4326" if not specified, uses the framework projection
Optionalprefix?: stringan alternate prefix to use for custom projection
Optionalproj4?: stringdefinition of the projection. See for example: http://spatialreference.org/ref/epsg/4326/proj4/ proj4
Optionaltype?: string
aliases to define