Boyd Shearer

• Senior Lecturer, UKy Geography 🔗
• Assistant Director, Ky DGI (yesterday) 🔗
• outrageGIS mapping 🔗

KyFromAbove

• KY Aerial Photo & Elev Data Prog (KYAPED)
• started in 2010 and ongoing.
• Multiple funding partners 🔗
• common goal: statewide, open data.

Data & vintages

• DEMs 🔗 from Lidar 🔗
  • Phase 1: 2010-2017
  • Phase 2: 2019-2024
  • Phase 3: 2023...
• Photography 🔗
  • Phase 1: 2012-2014
  • Phase 2: 2019-2022
  • Phase 3: 2022-2024

Resolution

• Highest resolution open data for Ky.
• 2-ft DEMs and 3-in photography
• Gives neighborhood context.

What about change?

• Point cloud has above ground features
• from two different vintages.
• change = Pt2 - Pt1
• But how to visualize?

Colorization

• RGB attribute in point cloud
• normally aerial photography.
• +change and -change
• Increase and decrease.

Two points

• Intersecting point clouds
• Pt2 and Pt1
• shown in same view.

ArcPy notebook 🔗