Example: biology
Public Land Survey System Plss Data
Found 2 free book(s)
What is Spatial History? - Stanford University
web.stanford.eduJan 10, 2002 · Figure 3 | Public Land Survey System. The Public Land Survey System (PLSS), as instituted by the Land Ordinance of 1785, organizes and divides American public lands into a rectangular system of 6-mile by 6-mile township/range squares which are further subdivided into 1-mile by 1-mile sections, numbered one through thirty-six.
US Topo Map Symbols - EDRnet
edrnet.comFeature data is incorporated from national Geographic Information System (GIS) databases under the stewardship of USGS data programs. The US Topo map is intended for conventional map users, not for advanced GIS analysis. However, most of the data sources used are in the public domain and may be downloaded for free from The National Map