The role of the airborne ground mapping radar has been dramatically changing over the last several years due to great technological strides in the science of radar design. Great improvements have been made in both the accuracy and resolution of radar systems primarily due to the influence of high speed digital signal processing and the development of synthetic aperature radar design. As a result of the many improvements to both radar system performance and flexibility, the role played by radar systems is also expanding. As advanced radar become part of aircraft avionics systems, the requirement for high fidelity training systems immediately follows. Changes to existing digital radar landmass (DRLMS) specifications will therefore be required. In order to meet the training requirements for advanced high resolution systems both enhanced revisions of current DRLMS systems and alternative technologies may be required.