Web Resources

The National Map Viewer

The National Map is a collaborative effort among the USGS and other Federal, State, and local partners to improve and deliver topographic information for the Nation.

USGS - National Map Viewer

Spatial Reference 

A great website for getting a coordinate system for your project

spatialreference.org

National Land Cover Database

The National Land Cover Database (NLCD) provides nationwide data on land cover and land cover change at a 30m resolution with a 16-class legend based on a modified Anderson Level II classification system. NLCD 2019 represents the latest evolution of NLCD land cover products focused on providing innovative land cover and land cover change data for the Nation.

www.mrlc.gov/data

USGS Land Cover

USGS provides land cover data for the United States in raster or vector (shapefile) format.

https://water.usgs.gov/GIS/dsdl/ds240/index.html

Roughness Characteristics of Natural Channels

Color photographs and data are provided for 50 stream channels for which Manning's roughness coefficients have been determined.

Determination of Roughness Coefficients for Streams in Colorado

This report investigates Manning's roughness coefficients for steep streams.