High-density LiDAR to Meet Southwest Florida Water Management District’s Specifications for Diverse Applications in Florida
Dense vegetation in Florida presents many challenges to conventional aerial laser topographic mapping. When those normal challenges are further stressed by additional multi-use requirements, high-density mapping presents itself as a reasonable solution. For this cooperatively funded project involving the Southwest Florida Water Management District (SWFWMD), the Hillsborough County Board of County Commissioners (BOCC), and the City of Tampa (COT), to accommodate the diverse requirements of several agencies and interests, Dewberry was selected to identify a LiDAR sensor and conduct the mission in the Winter of 2017.
To satisfy the multiple needs, including, but not limited to; (1) Hydrologic and Hydraulic Modeling (SWFWMD), (2) infrastructure maintenance (BOCC), and (3) urban forestry (COT), Dewberry proposed using a novel approach using a new LiDAR sensor, the Riegl VQ-1560i. After securing the use of the VQ-1560i directly from Riegl Inc., Dewberry planned and executed a mission to obtain an Aggregate Nominal Point Density to exceed 20 points/square meter. To accomplish this density, the flight plan called for a 60% overlap along 210 flightlines over a total flight length of 12,000 km to map the county (Hillsborough County = 3200 sq. km.)
This presentation discusses the flight acquisition and data processing considerations to meet the SWFWMD specifications as well as issues encountered during this project. The benefits and caveats of dense LiDAR mapping in challenging environments will also be discussed.