US Migrating
type: Agent

Digital Data
type: Distribution
access URL: https://doi.org/10.5066/F7765D7V
media type: application/http
description: Landing page for access to the data
format: XML
issued: 2022-07-28T21:39:12.066678
modified: 2025-11-23T00:00:01.594773

Original Metadata
type: Distribution
access URL: https://data.usgs.gov/datacatalog/metadata/USGS.5728f609e4b0b13d3918aa0e.xml
media type: text/xml
description: The metadata original format
format: XML
issued: 2022-07-28T21:39:12.066671
modified: 2025-11-23T00:00:01.594326

https://data.amerigeoss.org/dataset/80717ba0-61ad-4a14-8ca8-cf94cf072aa7
type: Dataset
contact point: Organization
  fn: Michael E. Wieczorek
keyword: amerigeo
keyword: national
keyword: 1990-population-density
keyword: amerigeoss
keyword: geoss
keyword: north-america
keyword: nhdplus
keyword: geo
keyword: nawqa
keyword: united-states
keyword: catchment
keyword: ckan
keyword: sparrow
keyword: inlandwaters
keyword: usgs-5728f609e4b0b13d3918aa0e
theme: {geospatial}
description: This tabular data set represents population density, persons per square kilometer from 1990 Census block level data, processed by James Falcone (USGS, 2016), compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMID. The source data for population density was produced by the U.S. Geological Survey (Falcone, 2016). Units are persons per square kilometer. Reach catchment information characterizes data at the local scale. Reach catchments accumulated upstream through the river network characterizes cumulative upstream conditions. Network-accumulated values are computed using two methods, 1) divergence-routed and 2) total cumulative drainage area. Both approaches use a modified routing database to navigate the NHDPlus reach network to aggregate (accumulate) the metrics derived from the reach catchment scale. (Schwarz and Wieczorek, 2018).
issued: 2025-11-23T00:00:01.603959
modified: 20200821
spatial: Location
title: Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Population Density from U.S. Block-Level Population Density Rasters for 1990