NHDPlus Texas Data (Vector Processing Unit 12)
![Map of Texas (Vector Processing Unit 12)](/sites/static/files/styles/large/public/2015-01/vpu12.png)
Each major drainage area of the United States contains a suite of NHDPlusV2 data. Within a drainage area, the NHDPlusV2 data components are packaged into compressed files either by Vector Processing Unit (VPU) or Raster Processing Unit (RPU). A drainage area is composed of one or more VPUs and a VPU is composed of one or more RPUs.
Drainage Area ID | TX |
---|---|
VPU | 12 |
RPUs | 12a, 12b, 12c, 12d |
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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" (182 pp, 4.3 MB, About PDF)