Arcs and polygon topology have been added for the Danby quad in southwestern Illinois, increasing the number of quadrangles to 1072. Two attribute values have been corrected. There was a value in the item USGS that contained a dash rather than a dot. This was corrected to conform with the correct format for this field. This is an alphanumeric combination of degrees north and west with a row column index applied to each 1 degree by 1 degree area.
Values are in decimal degrees.
Q15 - Indicates if arc is also a boundary for a 15 minute quad. 0 - arc is not a 15 min. 0 - arc is not a 30 x 60 min. DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose.