U.S. Geological Survey (USGS) - Digital Line Graph (DLG) - Hydrography

• Themes: water related map features
• Scale: 1:100,000
• Basic Unit: USGS 8-digit Hydrological Unit (Watershed)
• Date:?
• Major Layers:
  • Watershed Boundary (1:250,000)
  • Stream Network
  • Permanent Streams
  • Intermittent Streams
  • Drains and Ditches
  • Lakes and Ponds
  • Marsh

Michigan Resource Inventory System (MIRIS) - County Base Maps

• Themes: base maps
• Scale: 1:24,000
• Basic Unit: County
• Date:1978-1980
• Major Layers:
  • County Boundary
  • Township Boundary
  • Section Lines
  • Township-Range-Section (TRS)
  • Highways
  • County Roads
  • Two Tracks
  • Streets
  • Permanent Streams
  • Intermittent Streams and Drains
  • Lakes and Ponds
  • Great Lakes Shorelines