National Geospatial Program

Data and Tools

Here you will find publications, reports and articles produced by National Geospatial Program (NGP) scientists. For a comprehensive listing of all NGP publications please click on each of the pubs listed below.

Filter Total Items: 16
Date published: April 12, 2016

The National Map Small-Scale Collection

The National Map offers a collection of small-scale datasets, most of which are at 1:1,000,000. The National Map publishes two data collections at one million-scale: one for Global Map users and one for National Map users. In terms of vector geometry, the lines, points, and areas in these data collections are identical. The difference is in the attributes assigned to these features.

Date published: April 7, 2016

The National Map Data Download and Visualization Access

The National Map, managed by the USGS National Geospatial Program (NGP), provides free visualization, inspection, and download access to our most current US Topo and Historical Topographic Map products as well as GIS data for our primary data themes including: Elevation, Orthoimagery, Hydrography, Geographic Names, Boundaries, Transportation, Structures, and Land Cover. 

Date published: January 1, 2016

Data validating computation of boundary roughness from QL2 lidar derived digital elevation models for 2D hydraulic modeling applications--Pyhton Script and Toolbox

Calibration of hydraulic models require careful selection of input parameters to provide the best possible modeling outcome. Currently the selection of hydraulic resistance or 'n' values for these models is a subjective process potentially exposing models to critical review . A process is needed to objectively estimate n-values so everyone responsible for model calibration arrives at the...

Date published: January 1, 2016

Data validating computation of boundary roughness from QL2 lidar derived digital elevation models for 2D hydraulic modeling applications--Supplemental Table 1

Calibration of hydraulic models require careful selection of input parameters to provide the best possible modeling outcome. Currently the selection of hydraulic resistance or 'n' values for these models is a subjective process potentially exposing models to critical review . A process is needed to objectively estimate n-values so everyone responsible for model calibration arrives at the...