1. Use of GIS Analysis in Historic Preservation Disaster Response

2. Introduction New Orleans scenario –Widespread flooding –Large areas not immediately accessible –Condition of individual facilities unknown, therefore number and type of experts needed unknown as well

3. Goal Use GIS to assist in recovery efforts when historic assets, such as museums and historic sites, are impacted by a widespread flood disaster.

4. Goal Determine the likelihood that a facility has been flooded Prioritize recovery efforts by facility Estimate time when access to facilities would be feasible Provide a route to each facility avoiding streets blocked by flood waters or debris

5. Objectives Obtain digital data for water level and elevation Obtain or create point files showing the location of museums & historic sites Determine level of water at each location Categorize flood risk at each location to facilitate effective use of resources

6. Data USGS SDTS DEM files for Orleans Parish –1:24,000 –12 quadrangles to cover parish –Used mosaic tool to create one elevation raster –Publicly available at www.geocomm.com

7. Data TIGER street file –Publicly available from US Census Bureau –Based on USGS 1:100,000 topo maps Historic Sites shape file –Publicly available from the Louisiana Register of Historic Places

8. Data Water level raster –Source: FEMA –Not yet available to the general public –Created from LIDAR data

9. Data Parish boundary –US Geological Survey shape file –Contained all counties in the US –Created Orleans Parish shape file by selection –Publicly available at www.nationalatlas.gov

10. Data Museums file –Obtained list from www.neworleansmuseums.com www.neworleansmuseums.com –Entered addresses into a table –Created shape file using an address locator

11. Analysis Clipped all vector files using parish boundary file Created Museum feature class using Projected all files to Louisiana State Plane Created a geodatabase and imported all files

12. Analysis Used Zonal Statistics to determine elevation at locations of historic sites and museums Used Zonal Statistics to determine water depth at locations of historic sites and museums Joined elevation and water level tables to historic site and museum files

13. Analysis Queries to select historic sites and museums where water level was above ground level Output consists of 3 categories: –Green (water level =< ground level) –Yellow (water level up to 2 feet above ground level) –Red (water level > 2 feet above ground level

14. Analysis 24 Museums –14 with no flooding – 7 with flooding up to 2 feet – 3 with flooding over 2 feet

15. Analysis 101 Historic Sites101 Historic Sites –12 with no flooding –86 with flooding up to 2 feet –4 with flooding over 2 feet

18. Conclusion Improvements –Shape file of buildings –Transportation network –Incorporate GPS –Continually re-adjust based on water level