H-GAC Area Lidar Building Collection Arthur Crawford Esri Living - - PowerPoint PPT Presentation

H-GAC Area Lidar Building Collection

Arthur Crawford Esri Living Atlas Basemap Product Engineer

Status Map:

• Green:
• Delivered or ready for

delivery

• Orange:
• In progress (buildings

extracted, not divided by parcels or reviewed)

• Red:
• Building Rasters

completed, extraction not started.

Flood Control Area

Jagged angles from non 90 or 45 degree angles. Fixed 7,800 in Harris County.

Some jaggedness exists in the buildings that was not part of the 7800 identified for review. This is caused by the straightning of the features and we are working on ways to fix it with development of new tools in the future.

Some of the issues: Misclassification of Lidar as buildings (dense trees) Small building areas like this were not fixed.

Arthur Crawford

Demo: Galveston Buildings – Parcel issues

Generate 2D building polygons from the LiDAR and perform automated correction techniques.

• Phases
• Data Evaluation and Tool calibration
• Pilot testing – ensuring building data can be derived correctly from data
• Add area: Flood control area
• Phase 1 Harris County – Delivered with 1.5 million buildings
• Phase 2 Cambers County – Will be delivered this week.
• Phase 2 Galveston County – Delayed due to issues with parcels alignment to lidar buildings
• Phase 3 Work through remaining counties – smallest to largest in size. Estimated delivery:
• Liberty – 2 weeks
• Walker – 3 weeks
• Matagorda – 4 weeks
• Galveston – 5 weeks (Issue is parcels do not match buildings, Parcel ID cannot be applied)
• Brazoria and Jefferson – 6 weeks (Issue is parcels do not match buildings, Parcel ID cannot be applied)
• Waller and Austin – 7 weeks
• Montgomery – 9 weeks (Parcels appear to match fairly well)
• Orange County – 10 weeks
• Fort Bend – 11 weeks

Steps beyond 2D building footprints, using lidar to create a 3D world.

acrawford@esri.com 636-949-6620 ext. 8565