Vermont 2023 statewide QL1PROJECT period: JUN 26, 2023 through june 30, 2025PROJECT abstract:state of vermont, vermont agency of transportation is proposing a collaborative project to acquire QL1…

Vermont 2023 statewide QL1PROJECT period: JUN 26, 2023 through june 30, 2025PROJECT abstract:state of vermont, vermont agency of transportation is proposing a collaborative project to acquire QL1 inland topographic lidar for 9,649 square miles comprising the entire state of vermont. Vermont successfully participated in 3DEP from 2013 - 2017 and completed statewide QL2 lidar in 2017, which has been a tremendous asset to a growing number of users. Currently, vermont s data is an average of 8 years old and large portions of the dataset are out of date. Led by the vermont center for geographic information (vcgi) and the agency of transportation, vermont will build on the success of past partnerships to meet the growing need for more recent elevation data at a higher spatial resolution. Unlike previous efforts, the 2023 lidar acquisition will collect lidar for the entire state in a single year. Doing so will reduce costs through the economies of scale and reduce the amount of administrative overhead needed to manage the high number of deliverables that are associated with multi-year efforts. The new and improved elevation data will support activities across all sectors of vermont s strategic plan and core functions throughout government - including public safety, environmental protection, water quality, watershed management, geology, transportation planning, forest and wildlife management, local planning, and floodplain management, and more. The vermont lidar plan highlights some of the impactful work that is reliant upon the QL2 lidar data, provides a justification for a new state wide QL1 acquisition, and outlines the maintenance and distribution plan for the resulting products. All lidar related products will be added to the USGS 3DEP collection and will become part of the vermont lidar programs list of curated elevation assets where they will be made publicly available through the national map and the vermont open geodata portal respectively as web services, direct downloads, interactive map viewers, and customized web mapping applications.vcgi proposes a collaborative project to collect 9,649 square miles of QL1 lidar data in a single season for the entire state of vermont. Presently, large portions of vermont s QL2 lidar dataset are out of date ( 8 years) and stakeholders have expressed a desire to obtain more recent elevation data at a higher resolution. Vermont has a history of engaging with partners to acquire lidar data and this project will leverage the relationships built from past experiences. The resulting QL1 lidar products will be made publicly available through the national map, USGS entwine, and the vermont open geodata portal as streamable services, direct downloads, in interactive map viewers, and in customized web mapping applications where they can serve an abundance of end user needs. Vcgi intends to contract with sanborn, INC. To collect and process the lidar data to meet the USGS 3DEP lidar base specifications requirements for QL1 data. The following are understood to be the basic requirements for this project:1) acquisition and post-processing: national geospatial program lidar base specification 2022, revision a at QL1 with an anps of 0.35 meters. 2) spatial accuracy: rmsez 10 CM NVA at the 95-percent confidence level 19.6 CM VVA at the 95TH percentile 30 CM.3) hydro-flattening: national geospatial program lidar base specification 2022, revision a. 4) classification scheme: national geospatial program lidar base specification 2022, revision a. 5)field testing: non-vegetated vertical accuracy (NVA) and vegetated vertical accuracy (VVA) check points required. Deliverables:1. Classified point CLOUD2. Bare earth surface (raster DEM)3. BREAKLINES4. Intensity IMAGES5. Maximum height surface RASTERS6. Swath separation IMAGES7. Swath POLYGONS8. Ground SURVEY9. Lidar mapping REPORT10. METADATA11. Project pilot