This article discussed the use of geospatial data such as elevation data to estimate flooding in New Orleans. Light detection and ranging (lidar) remote sensing is a tool that is used to map this area. This data was used in response to Katrina to analyze inundation. Lidar data was collected in 2002 by the Louisiana Oil Spill Coordinator’s Office and made publicly available.
The data recorded in 2002 was valuable after Katrina to map the extent of flooding throughout New Orleans. The lidar elevation data was used to estimate the volume of floodwater in order to predict the amount of time required to remove it. The depths were relative to the elevation of water that was recorded by a gage on Lake Pontchartrain.
The application of topographic data with gage data for mapping was very useful when information was needed. Elevation data is valuable to assess flooding in cities and may aid in planning and reconstruction of infrastructure in the future.
Gesch, Dean. "Topography-based analysis of Hurricane Katrina inundation of New Orleans." Science and the Storms: the USGS Response to the Hurricanes of (2005): 53-56.