This dictionary specifies the standard values for ObjectPointType, specified in the Image geopositioning metadata GML 3.2 application schema. This ObjectPointType is the type of an object point. In addition, this dictionary specifies definition URNs in the "ogc" URN namespace for these type values. ObjectPointType Point with measured position in one or more images, used to geoposition those images. tiePoint Point with known object position used to geoposition one or more images. controlPont Point with known object position measured image position(s), used to check the geopositioning of one or more images. checkPoint