Professional Organizations

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• State of Ohio Engineers and Surveyors Board

• Professional Land Surveyors of Ohio (PLSO)

• National Society of Professional Surveyors (NSPS)

Map Services

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• United State Fish & Wildlife Service National Wetlands Inventory
• United States Geological Survey (USGS) EarthExplorer
• United States Geological Survey (USGS) National Map Viewer
• Bureau of Land Management (BLM) Public Land Survey System
• Federal Emergency Management Agency (FEMA) Flood Map Service Center
• National Geodetic Survey (NGS) Data Explorer
• Ohio Department of Natural Resources (ODNR) Interactive Maps
• Ohio Department of Transportation (ODOT) Maps
• Ohio Geographically Referenced Information Program (OGRIP) Ohio Statewide Imagery Program (OSIP) Data Downloads
• Public Utilities Commission of Ohio (PUCO) Maps
  

Tools

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• National Geodetic Survey (NGS) Online Positioning User Service (OPUS)
  
• National Geodetic Survey (NGS) State Plane Coordinates Utilities
  
• National Geodetic Survey (NGS) VERTCON: North American Vertical Datum Conversion

Ohio Research

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• Ohio County Auditors Directory
  
• Ohio County Engineers Directory
  
• Ohio County Recorders Directory
  
• Ohio Department of Transportation (ODOT) District Map and Contact Information