I recently downloaded a GeoTIFF 1 arc second from the USGS National Map Viewer. I added the raster to ArcScene and attempted to visualize the data in 3D. I set the Base Height to Floating on a Custon Surface, changed the Resolution to that of the Original Surface (3612 rows and columns; 0.000278 cell size). However, when it's done processing, my DEM just looks a mess; there are giant spikes all through the data. I've tried downloading DEMS from other areas and repeating the process but I get the same result.
What am I doing wrong? I suspect perhaps there are Null values but I'm not sure. Any help would be greatly appreciated.