1. Western Fisheries Research Center Central Coast GIS Users Group Meeting November 10, 2010 Justin A. Saarinen, GISP USGS Geographer Western Fisheries Research Center Newport Duty Station jsaarinen@usgs.gov Development of the Best Available Seamless Intertidal DEM for the Yaquina River Estuary from Multiple Sources

2. Western Fisheries Research Center Attempting to better understand the threats of sea-level rise to ecosystem services in PNW estuaries. Implementing a sea-level affecting marshes model (SLAMM) methodology. DEM is a critical parameter for SLAMM. PROJECT CHALLENGE:

3. Western Fisheries Research Center STUDY AREA

4. Western Fisheries Research Center Existing elevation sources and models BEST AVAILABLE DATA

5. Western Fisheries Research Center NEDLiDAR

6. Western Fisheries Research Center Three Options: Terrain dataset in Geodatabase as recommended by ESRI Triangular Irregular Network (TIN) with mass points and breaklines as recommended by ASPRS DEM merge procedure performed by USGS EROS for the NED

7. Western Fisheries Research Center NEDLiDAR Triangular Irregular Network (TIN) Digital Elevation Model Technologies and Applications: The DEM Users Manual, 2nd Edition. Maune, D., editor. Bethesda, Maryland, American Society for Photogrammetry and Remote Sensing, p. 99-118.

8. Western Fisheries Research Center Terrain Feature Dataset http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=An_overview_of_terrain_datasets

9. Western Fisheries Research Center Gesch, D., and Wilson, R., 2002, Development of a seamless multisource topographic/ bathymetric elevation model of Tampa Bay: Marine Technology Society Journal, v. 35, no. 4, p. 58-64. DEM Merge: Resample and Mosaic NED 10 mx 10mLiDAR 1m x 1mMixed 1mx1m

10. Western Fisheries Research Center DEM Merge: Resample NED 10m x 10mNED 1m x 1m

11. Western Fisheries Research Center DEM Merge: Mosaic Generate Empty Raster with dimension (rows, columns, cell size) + Rectify Inputs to dimensions + Replace Null Values with a tag (9999)

12. Western Fisheries Research Center DEM Merge: Mosaic NED3mx DEMxdu9 NED3m

13. Western Fisheries Research Center What’s Next? Accuracy Assessment

14. Western Fisheries Research Center Year 20002100 1-meter SLR