Network topology and mainstem identifiers for the High Resolution National Hydrography Dataset (NHD) based initial 3D Hydrography Program Network
Description
This dataset contains the initial 3D Hydrography Program (3DHP) flow network topology which is based on the
final High Resolution National Hydrography Dataset (NHD) and a set of mainstem river identifiers based on
on the Medium resolution NHDPlus Version 2 (NHDPlusV2). The 3DHP flow network topology and mainstem identifiers contained
in this data release add two key pieces of information to the flow table of the National Hydrography Dataset:
1) at every junction, one and only one main upstream and downstream connection have been
identified
2) every "in network" flowline has been assigned a mainstem identifier that places it into a
hierarchy of rivers and drainage basins.
For description of 1 and 2 and additional background, see supplemental information.
Files included:
- HU6_mainstem_outlets.geojson
Outlet locations of six-digit hydrologic units along mainstem network.
- nhd_3dhp_conus_mainstems.zip
Zipped csv table containing NHD CONUS permanent identifiers and mainstem URIs.
- nhd_3dhp_conus_flownetwork.zip
Zipped csv table containing from / to NHD permanent identifiers (from flowline to flowline) and upmain / downmain attributes.
- nhd_3dhp_conus_vpu_membership.zip
Zipped csv table containing NHD permanent identifiers and which VPU they belong in.
- nhd_3dhp_oconus_mainstems.zip
Zipped csv table containing NHD oconus permanent identifiers and mainstem URIs.
- nhd_3dhp_oconus_flownetwork.zip
Zipped csv table containing from / to NHD oconus permanent identifiers (from flowline to flowline) and upmain / downmain attributes.
-3dhp_flownetwork.zip
Zipped csv table containing from / to 3DHP identifiers (from flowline to flowline) and upmain / downmain attributes.
- nhd_3dhp_nonnetwork_mainstems.zip
Zipped csv table containing mainstem ids for features not included in the NHD flowtable.
- nhd_final_registry.zip
Zipped csv table containing all expected flowlines from the final NHD -- excludes geometry.
- nhd_reachcode_mainstem.zip
Zipped csv table containing a mapping between mainstem identifiers and NHD reachcodes.
- nhd_3dhp_region_connections.zip
Zipped csv table containing connections between vector processing unit regions defined by
four digit hydrologic unit.
- nhd_3dhp_mainstem_summary.zip
Zipped csv table containing summary information about mainstems contained in nhd_3dhp_conus_mainstems.zip
and nhd_3dhp_oconus_mainstems.zip.
Resources
| Name |
Format |
Description |
Link |
|
55 |
The metadata original format |
https://data.usgs.gov/datacatalog/metadata/USGS.650cba99d34e823a0273a790.xml |
|
55 |
Landing page for access to the data |
https://doi.org/10.5066/P94H0DAG |
Tags
- environment
- usgs-650cba99d34e823a0273a790