How can a user get updates of the NED?
The Data Source Index map shows areas which have been updated for all resolution of the NED collectively and is viewable at the NED – Data Source Index. Spatial metadata shapefiles showing these areas of updates for each resolution are also available to download from the NED Metadata download page. Once the customer identifies a specific area of interest has been updated the data can be reacquired through the USGS National Map Seamless Server or through a bulk data delivery request. Email: bulkdatainfo@usgs.gov for information.