United States Interagency Elevation Inventory (USIEI)

A nationwide listing of known publicly available high-accuracy topographic and bathymetric source elevation data for the United States and its territories. The inventory provides a single resource for information about all known completed and in-progress broad-area public domain elevation data. The information provided for each elevation dataset includes many attributes such as vertical accuracy, point spacing, and date of collection. A direct link to access the data or information about the contact organization is also available through the inventory.

The United States Interagency Elevation Inventory raises awareness of and increases access to existing elevation data, thereby reducing data duplication efforts. It helps to identify data gaps and informs and encourages collaboration on future data collection efforts. The inventory displays data set boundaries and provides information about the elevation data but does not host the data itself. If available, links to access the data, metadata, and reports are included.

The inventory viewer uses map services from multiple sources to provide information both topography and bathymetry. Map services from NOAA NCEI display the footprints and attribute information for the NOAA Hydrographic Surveys, Multibeam Bathymetry, and Trackline Surveys. A map service from USACE provides the USACE Hydrographic Surveys. Map services from NOAA Office for Coastal Management provide the bulk of the topographic and bathymetric lidar information. The NOAA NCEI and USACE service are updated regularly as new data in ingested.

The data supporting the NOAA OCM hosted services are maintained by a partnership of federal agencies and supports the federal elevation theme. The agencies include NOAA, the U.S. Geological Survey, the Federal Emergency Management Agency, the U.S. Department of Agriculture, the U.S. Forest Service, the National Park Service and the U.S. Army Corps of Engineers. This service is updated quarterly through an active process of data discovery and validation.

High resolution, high accuracy datasets are often publicly available, but scattered in many places. This tool serves as a central index for available topographic and bathymetric data sets, provides information about the data sets, and directs the user to further information.

The following data layers are updated quarterly: topographic lidar, topobathy shoreline lidar, IfSAR data, and bathymetric lidar.

The NOAA hydrographic surveys, the multibeam and trackline surveys are dynamically updated via services that are available from the NOAA National Centers for Environmental Information (NCEI).

NOAA Hydrographic Surveys

https://gis.ngdc.noaa.gov/arcgis/rest/services/web_mercator/nos_hydro_dynamic/MapServer

Multibeam Bathymtery

https://gis.ngdc.noaa.gov/arcgis/rest/services/web_mercator/multibeam_dynamic/MapServer

Trackline Surveys

https://gis.ngdc.noaa.gov/arcgis/rest/services/web_mercator/trackline_combined_dynamic/MapServer

The US Army Corps of Engineers (USACE) hydrographic surveys are dynamically updated via a service that is available from the USACE.

https://services7.arcgis.com/n1YM8pTrFmm7L4hs/arcgis/rest/services/eHydro_Survey_Data/FeatureServer

Where possible, 29 attributes are provided for topography and up to 10 attributes are provided for bathymetry to give users a better idea of data set quality. The attributes for topography and bathymetry are listed below.

Topography Attributes

Data Set Type, Data Set Name, Collection Date, Status, Collection Year, Data Access, Metadata Access, Additional Resources, 3D Point Viewer, Entwine Point Tiles, Record Owner, For More Information Contact, Web Service Link, 3D Elevation Program (3DEP) Quality Level, Meets 3DEP, Reason Data Does/Does Not Meet 3DEP, Meets 3DEP - Lidar Point Cloud (LPC), Vertical Accuracy, Horizontal Accuracy, Point Spacing, Vertical Datum, Horizontal Datum, Products Available, Restrictions, Notes, Point Classes, Contract Spec, Data Collected Leaf On/Off, Alternate Name

Bathymetry Attributes

NOAA Hydrographic Surveys - Data Set Name, Collection Date, Status, Collection Year, Data Access, Record Owner, Ship Name

USACE Hydrographic Surveys - Data Set Name, Collection Date, Status, Collection Year, Data Access, Survey Plot Sheet, Record Owner, Survey ID, District

Multibeam Bathymetry - Data Set Name, Collection Date, Status, Collection Year, Data Access, Record Owner, Ship Name, Chief Scientist, Instrument, Notes

Trackline Bathymetry - Data Set Name, Collection Date, Status, Collection Year, Data Access, Record Owner, Ship Name, Chief Scientist

Intended use of this information is not for navigational purposes. Acquire metadata for additional information on each data set and verification of accuracy of inventory content. Any conclusions drawn from the analysis of this information are not the responsibility of the National Oceanic and Atmospheric Administration (NOAA), the U.S. Geological Survey (USGS), the Federal Emergency Management Agency (FEMA), the U.S. Department of Agriculture (USDA), the U.S. Forest Service (USFS), the U.S. Army Corps of Engineers (USACE), the National Park Service (NPS), the NOAA National Centers for Environmental Information (NCEI), the NOAA Office for Coastal Management or their partners.

Online Resource

None

None

Map services are used to access information about public domain elevation data sets.