NED data in GridFloat format

This is the same NED data except in Grid float format. These files are twice as big as the BIL format. They will run a bit slower for generating network backgrounds.

Downloading

The files are named by the North West corner having the following syntax:

 NXXWYYY.zip
  
 where XX = the latiude in degrees and YYY = longitude in degrees 

The files are available in two resolutions:

1" GridFloat files (covers North America):

ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/1/GridFloat/

1/3" GridFloat files (covers the USA):

ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/13/GridFloat/

Using with Pathloss 5

Once the files have been downloaded use the following proceedure to set up with Pathloss 5

Unzip the files to a common directory. Each ZIP file will contain 22 files, a FLT file and 21 supplemental files. When unzipping multiple archives to the common directory, you may be prompted to overwrite some existing files, this is noraml and you should select yes. Do not modify or delete any of the other files.

Once unzipped you should have a directory tree similar to the following: