Building a New Authoritative GIS Boundary File for Indiana
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Authoritative GIS Boundary File for Indiana 2013 Indiana GIS Conference Steven J. Hook, GISP GIS Coordinator, Noble County Government 101 N Orange St, Albion, IN 46701 Office: 260-636-1293, Ext. 5201 Cell: 260-564-0802 [email protected] Noble County, IN
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Building a New Authoritative GIS Boundary File for Indiana. Noble County, IN. 2013 Indiana GIS Conference. Steven J. Hook, GISP GIS Coordinator, Noble County Government 101 N Orange St, Albion, IN 46701 Office: 260-636-1293, Ext. 5201 Cell: 260-564-0802 [email protected]. - PowerPoint PPT Presentation
Transcript of Building a New Authoritative GIS Boundary File for Indiana
Building a New Authoritative GIS
Boundary File for Indiana
2013 Indiana GIS Conference
Steven J. Hook, GISPGIS Coordinator, Noble County Government101 N Orange St, Albion, IN 46701Office: 260-636-1293, Ext. 5201Cell: [email protected]
Noble County, IN
Noble County, IN – 2013 Indiana GIS Conference Slide 2
Determine Legal Description for County Boundary
• Indiana Acts 1935, 20th Session, General Assembly – County formed, effective June 1, 1835, using 4 Super Corners.
• June 11, 1859 – Alteration by County Commissioner’s report. Noble Co. lost to Whitley Co. using 4 additional corners.
Noble County, IN – 2013 Indiana GIS Conference Slide 3
Noble County Super Corners Identified
Noble County, IN – 2013 Indiana GIS Conference Slide 4
Identifying Section Corners along County Boundary
• Request placed with the Noble County Surveyor’s Office
208 section corners revisited in December 2012 GPS state plane coordinates generated by Surveyor’s Office
staff
• Contacted neighboring Counties for section corner information – Allen, DeKalb, Elkhart, and Kosciusko
• Section Corners fall mostly along Township and Range lines
Standard Corners along South and East County lines Closing Corners along North and West County lines Exception for Corners within Washington Twp.
• Look for anomalies along boundary – Indian Treaty Boundary
• Determine section corner ownership, corresponding grid point name, and attribute values
Noble County, IN – 2013 Indiana GIS Conference Slide 5
Section Corner Accuracy
Point Quality
#0 High Quality Field Location (153)
#0 Calculated - interpreted between points (22)
#0 Ortho-photo interpretation (32)
#0 Location plotted to unknown accuracy (1)
Noble County, IN – 2013 Indiana GIS Conference Slide 6
Anomaly along boundary – Indian Treaty Boundary
Noble County, IN – 2013 Indiana GIS Conference Slide 7
Determine Section Corner Ownership and Corresponding Grid Point Name
IGS Grid Points
Section Corner Ownership#0 LAGRANGE
#0 NOBLE
Noble County, IN – 2013 Indiana GIS Conference Slide 8
Determine Section Corner’s Corresponding Grid Point Name
Section Corner Ownership#0 NOBLE
Noble County, IN – 2013 Indiana GIS Conference Slide 9
Fill in 36 Section Corner Attribute Values
Noble County, IN – 2013 Indiana GIS Conference Slide 10
Future GIS Work related to Updated County Boundary
• Create new County Boundary polygon
• Share with the State our updated County Boundary
• Update various GIS layers affected by new section corner locations
• Continue to work with neighboring counties to update our closing corners between their closing corners.
