Network topology and mainstem identifiers for the High Resolution National Hydrography Dataset (NHD) based initial 3D Hydrography Program Network
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 …