Some of the key components of any Planetary Spatial Data Infrastructure (PDSI) are the data products that end-users wish to discover, access, and interrogate. One precursor to the implementation of a PSDI is a knowledge inventory that catalogs what products are available, from which data producers, and at what initially understood data qualities. We present a knowledge inventory of foundational PSDI data products: geodetic coordinate reference frames, elevation or topography, and orthoimages or orthomosaics. Additionally, we catalog the available gravity models that serve as critical data for the assessment of spatial location, spatial accuracy, and ultimately spatial efficacy. We strengthen our previously published definitions of foundational data products to assist in solidifying a common vocabulary that will improve communication about these essential data products.

任何行星空间数据基础架构（PDSI）的一些关键组件都是最终用户希望发现，访问和询问的数据产品。实施PSDI的先驱是知识清单，其中列出了哪些产品可用，哪些数据生产者以及最初了解的数据质量。我们提供了基础PSDI数据产品的知识清单：大地坐标参考系，高程或地形以及正射影像或正马赛克。此外，我们对可用的重力模型进行了分类，这些重力模型用作评估空间位置，空间准确性以及最终空间效能的关键数据。