Model-based image understanding applications such as Model Supported Exploitation require accurate model-to-image registration Manual photogrammetric control of imagery is currently a time consuming process. For areas which are exploited repeatedly, a database of control features can be built and automatically registered to new images of the scene. To minimize the effort involved in creating the registration control feature database, it is highly desirable to use the same features on images of all sensor types (EO, IR, and SAR). This paper discusses the registration of features constructed on EO imagery to SAR imagery.