Connecticut Building Viewer

This application includes 2D buildings, 3D buildings, and imagery are provided from the State of Connecticut by Dewberry. Data is derived from the 2023 Lidar capture. 3D Buildings: The statewide 3D building data was merged into a single multipart feature class, processed in ArcGIS to create a scene layer package, and published to ArcGIS Online. 2D Buildings: Connecticut Statewide Building footprints were created during the CT Statewide GIS Services lidar project. Building footprints are reviewed against lidar intensity imagery to verify completeness of capture. Ground Conditions: Lidar data was collected in Spring 2023 under leaf-off conditions, with no snow cover and rivers at or below normal flow levels. To meet task order requirements and ASPRS vertical accuracy standards, Dewberry established 38 ground control points used to calibrate the lidar to known ground positions across the project area. An additional 247 independent accuracy checkpoints—145 in Bare Earth and Urban land cover types (NVA points) and 102 in Tall Grass and Brushland/Low Trees categories (VVA points)—were used to evaluate vertical accuracy. These independent checkpoints were not used in calibration or post-processing. 2D Buildings (Link) 3D Buildings (Link) Imagery (Link)