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Accumulation Extension
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Download & Installation instructions
NHDPlusV2 data is distributed by the major drainage areas of the United States.
Within a Drainage Area, the NHDPlusV2 Accumulation Extension components are packaged into compressed
files by Vector Processing Unit (VPU).
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| NHDPlusV2 Distribution Filename Key |
NHDPlusV2nn_<dd>_<VPUid>_componentname_<vv>
or
NHDPlusV2nn_<dd>_<VPUid>_<RPUid>_componentname_<vv> |
| where: |
| V2nn is Version (2) and subversion (nn) of the NHDPlusV2 data model |
| dd is the drainage area identifier |
| VPUid is the VPU identifier |
| RPUid is the RPU identifier |
| Componentname is the name of the NHDPlusV2 component contained in the file |
| vv is the data content version, 01, 02, ... for the component |
Additional information about the NHDPlusV2 content and distribution format
can be found in the "NHDPlusV2 User Guide" |
HTTP
Download
| FTP
Download
| File
Name
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Right click on the icon representing your desired download method in the table below and choose "save file to disk."
(or)
You may connect to the NHDPlus FTP site (ftp://ftp.horizon-systems.com)
with an FTP client. FTP clients are generally faster than file transfer through a browser.
Installation instructions:
NHDPlusV2 data is distributed in compressed files created by 7-Zip
(compression software) with a ".7z" extension. While 7-Zip can create
files in standard Zip format, the NHDPlusV2 data is stored in a special
7-Zip format which creates even smaller compressed files.
This helps preserve disk space and shorten download times.
7-Zip, and other zipping utilities that support ".7z" files, may be used
to uncompress the NHDPlusV2 data. 7-Zip is a free utility available at:
http://www.7-zip.org/download.html.
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