Intro to GPS & GIS -SIU - TOPS Class -38°47’41”N 89°59’46”W -Elevation 557 ft.  

After GPS and GIS, this item showed up along the banks of the Mississippi River. If you want to knw what it is, email us :)

After GPS and GIS, this item showed up along the banks of the Mississippi River. If you want to knw what it is, email us :)


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