The presence of spatial indices was also checked. The presence of a BND file was verified. The presence and location of TICS were checked. Chain-node topology present. There are several appropriate dangling arcs.
Boundary values are appropriate for map projection and map units.
See process steps for March, 1998. There are no attribute values outside the appropriate domains. This data include all Indian Treaty boundary lines in Illinois as depicted on the source maps. Horizontal positional accuracy is spot verified by manual overlay of source and hard-copy plots. Arcs within line-width of source maps are deemed acceptable.