![]() ![]() The data were originally developed, however, in a custom Lambert Conformal Conic projection and were distributed in that coordinate system for several years. As of 2003, the data are typically distributed in geographic coordinates (longitude and latitude), decimal degrees, and the North American Datum (NAD) of 1983, and this is the default spatial reference of the ArcSDE feature dataset in which the data are stored. Polygon attributes identify meridian, township, range. Line attributes identify state, township and range boundaries, principal meridians, and base lines. This dataset contains townships from the Illinois Public Land Survey System in line and polygon form. What legal disclaimers am I supposed to read?.What's the catalog number I need to order this data set?.Are there legal restrictions on access or use of the data?.How can someone get a copy of the data set?. ![]() How consistent are the relationships among the data, including topology?.Where are the gaps in the data? What is missing?.How accurate are the heights or depths?.How accurate are the geographic locations?.How well have the observations been checked?.How reliable are the data what problems remain in the data set?.What similar or related data should the user be aware of?.How were the data generated, processed, and modified?.From what previous works were the data drawn?.To whom should users address questions about the data?. ![]()
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