Fly Dane Projects

Fly Dane 2017 data acquisition got under way in April 2017. Ayres Associates was selected as the vendor and partner for this project.

The 2017 acquired updated aerial imagery and terrain data for all of Dane County.

Imagery

• Developed 6-inch resolution, 4-band, color imagery
• FGDC compliant metadata

Terrain

• Acquired a new county-wide LiDAR based terrain model
• Met Quality Level 2 specifications with a nominal point spacing of 0.7 meters
• Classified LAS point cloud
• Derivative bare earth and first return terrain surfaces
• Derivative contour smoothing, cartographically pleasing 1-foot contours
• Derivative 2-D, countywide forest canopy polygon dataset
• FGDC compliant metadata

Partner Buy-Ups

• Provided contract flexibility for partners to select enhanced products
  • 3-inch resolution, 4-band color imagery
  • Planimetrics – edge of curb, edge of pavement, back of sidewalk, etc.
• No enhanced products were requested by partners

The Fly Dane Partnership undertook a 2014 orthophotography project. A project planning workgroup was formed with representation from the county and regional Fly Dane partners. This project marked a change in the acquisition timeline and that the partnership moved from a 5-year cycle to a 3-year cycle. This proposal was reviewed by the partnership and approved by the Dane County Land Information Council.

The 2014 project acquired updated aerial imagery and terrain data for all of Dane County.

Imagery

• Developed 6-inch resolution, 4-band, true color imagery countywide
• Imagery registered to the 2019 digital terrain surface

Additional Products

The imagery was used to update the county street centerline and building footprint databases.

A project planning workgroup was formed with representation from the county, municipal and regional Fly Dane partners. The proposal was reviewed by the partnership and approved by the Dane County Land Information Office Committee. Fly Dane Partners took funding proposal back for local budget discussions.

The initial plan was for a two year project that would consisted of a 2009 LiDAR base terrain project and then a 2010 color orthoimagery project.

Terrain - 2009

• Developed a new county-wide LiDAR based terrain model
• Developed bare earth and classified DEM
• Developed 2’ contours county-wide
• Created supporting reports and documentation

Imagery - 2010

• Developed 6-inch resolution color imagery in areas specified by partners. This may result in more or less 6-inch coverage than previous Fly Dane projects
• Developed a derived 1-foot resolution black/white imagery countywide
• Developed a derived 6-inch resolution black/white imagery in areas specified by partners
• Developed 5-meter county-wide image

Additional Products

• Continued to provide contract flexibility for partners to pay for add-on’s
• Potential add-ons:
  • Building footprint update
  • 3-inch resolution color imagery
  • 1-foot contours
  • Planimetrics – edge of curb, edge of pavement, back of sidewalk, etc.