Topographic Lidar Survey of the Alabama, Mississippi, and Southeast Louisiana Barrier Islands, from September 5 to October 11, 2012 -- Bare Earth Digital Elevation Models

• Main Author: U.S. Geological Survey
• Format: Dataset
• Language: unknown
• Published: USGS Science Data Catalog 2013
• Subjects: model; remote sensing; elevation data; lidar; Digital Elevation Model; DEM; topography; hydrology; laser altimetry; bare earth; LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION; OCEAN > COASTAL PROCESSES > BARRIER ISLANDS; COASTAL PROCESSES > BEACHES; DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR; LIDAR > LIGHT DETECTION AND RANGING; distributions; bathymetry and elevation; altimetry; topographic mapping; LIDAR; digital elevation models; Alabama; Mississippi; Louisiana; Gulf of Mexico; Barrier Islands; Gulf of Mexico Barrier Islands; Raccoon Island; Trinity Island; Isles Dernieres; Timbalier Island; East Timbalier Island; Port Fourchon; Elmers Island; Grand Isle; Grand Terre Island; Bastian Island; Pelican Island; Stake Island; Grand Gosier Island; Breton Island; Chandeleur Islands; Cat Island; Ship Island; Horn Island; Petit Bois Island; Dauphin Island; United States; Bois Island
• Online Access: https://search.dataone.org/view/f1f83c76-ae85-4156-aebc-9d65db4d4af6

A topographic lidar survey was conducted from September 5 to October 11, 2012, for the barrier islands of Alabama, Mississippi and southeast Louisiana, including the coast near Port Fourchon. Most of the data were collected September 5-10, 2012, with a reflight conducted on October 11, 2012, to increase point density in some areas. The data were collected at a nominal pulse space of 1-meter (m) and processed to identify bare earth elevations. Bare earth Digital Elevation Models(DEMs) were generated based on these data. Aero-Metric, Inc., was contracted by the U.S. Geological Survey (USGS) to collect and process the lidar data. The bare earth DEMs are 32-bit floating point ERDAS Imagine (IMG) files with a horizontal spatial resolution of 1-m by 1-m. They are projected to UTM zone 15N or 16N NAD83 meters. Their vertical datum is NAVD88 (GEOID12) meters. The DEMs are organized on a 2-kilometer (km) by 2-km tiling scheme that covers the entire survey area. These lidar data are available to Federal, State and local governments, emergency-response officials, resource managers, and the general public.