This paper presents the development of a soil-environmental data superstructure for the U.S. in context of a coherent Meta Soil Carbon Model. The Meta Soil Model provides a formalized approach to create digital soil realizations grounded in various philosophical worldviews and is described in detail in part I. We assembled a wide suite of environmental covariates from a variety of sources representing potential soil forming factors in consistent format at the finest spatial resolution available across the U.S. A total of 250+geospatial environmental variables were acquired and many were mosaicked from tiles. These include 700+spatial layers representing different time periods of environmental variables. In addition we created/retrieved various regional and national spatially-explicit soil carbon datasets. Soil and environmental data were harmonized to prepare digital modeling to create a multiplicity of soil realizations (maps and models) including those that meet the specifications of the Global Soil Map project.