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Report for H13423 Locality: Approaches to Chesapeake Bay Sublocality: 48 NM SE of Cape Henry State(s) or Region(s): Virginia Start Date: 2021-06-27 End Date: 2021-06-30 These data are not to be used for navigation. For navigation please refer to NOS Nautical Charts. Download times vary depending on file size and data transfer rates. Download All Products for H13423
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Survey Products

Descriptive Report and Metadata Documents

NOAA/NOS Descriptive Reports and Metadata Documents
Products listed in these reports may not reflect final products available through NCEI.
H13423_DR.pdf	5.38MB	The document may be read using a free Adobe Reader.
H13423_DR.xml	32.7KB	Descriptive Report in XML format. May be opened using a web browser or text viewer.
NOAA/NOS ISO metadata record
H13423 View / Download H13423.xml		Usually presented as an XML document, which captures the basic characteristics of HSMDB metadata verified from H10000 (1982) to the present as well as F00200 (1965) to the present.

Bathymetry

Survey products may use different units, datums or projections than the associated survey. Please consult product-specific metadata for additional details.
Variable Resolution Bathymetric Attributed Grid
H13423_MB_VR_MLLW.bag	98.63MB	The Variable Resolution BAG format is a gridded, multi-dimensional, multi-resolution bathymetric data file (see Open Navigation Surface). Currently supported with open source GDAL. The BAGXYZ files are ascii representations of the BAG data in XYZ format, but do not include uncertainty.
H13423_MB_VR_Ellipsoid.bag	98.63MB	The Variable Resolution BAG format is a gridded, multi-dimensional, multi-resolution bathymetric data file (see Open Navigation Surface). Currently supported with open source GDAL. The BAGXYZ files are ascii representations of the BAG data in XYZ format, but do not include uncertainty.

Images

GeoImagePDF
H13423_GeoImage.pdf	28.91MB	NOAA/NOS Layered GeoSpatial Image PDF File. Created by NOS to include chart and survey layers in a georeferenced pdf format.
NOAA/NOS sidescan sonar mosaic in TIFF format
H13423_SSSAB_1m_455kHz_1of1.tiff	117.60MB	NOAA/NOS TIFF sidescan sonar mosaic survey image. The mosaic may be viewed with a standard image viewer.
NOAA/NOS multibeam acoustic backscatter mosaic in TIFF format
The multibeam acoustic backscatter mosaic is readable with various applications such as the free CARIS Easy View, or ESRI ArcGIS geospatial visualization software.
H13423_MBAB_2m_300kHz_1of1.tif	18.73MB	NOAA/NOS TIFF multibeam acoustic backscatter mosaic survey image.

Bottom Samples and Tide Documents

Bottom Sample Data
NOAA/NOS bottom sample listing in IMLGS (pre-1989)
Link to H13423 in IMLGS (pre-1989 samples)		Search NOAA/NOS seabed samples submitted to IMLGS through NMNH (pre-1989). Modern survey bottom samples are not currently viewable on a map service.
NOAA/NOS bottom sample document in PDF or ASC format
H13423_BottomSamples.ascii	0.8KB	NOAA/NOS bottom sample document in PDF or ASC format.
Zip file containing bottom sample images and a shapefile of their locations
H13423_BottomSamples_shp_images.zip	3.13MB	Images may be viewed as standalone products or the shapefile can also be used to display where the images were taken.
NOAA/NOS Tide Note in PDF Format
H13423_tn.pdf	126.6KB	This document may be read using a free Adobe Reader.

Project Documents

Project Sketch in JPEG format
H13423_ProjectSketch.jpg	73.9KB	Project sketch image with highlighted survey area.
Data Acquisition and Processing Report in PDF format
OPR-D304-TJ-21_DAPR.pdf	45.86MB	This document may be read using a free Adobe Reader.

Survey Metadata

Survey Summary

Locality Sublocality State or Region Approaches to Chesapeake Bay 48 NM SE of Cape Henry Virginia

Start Date End Date Approval Date 2021-06-27 2021-06-30 2021-07-29

Project Number Project Name Purpose OPR-D304-TJ-21

Source of Original Data and License Information

License Information These data were produced by NOAA and are in the public domain within the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0-1.0). View the license deed. View the legal code.

Reference System Information

Vertical Datum Horizontal Datum Projection Scale Mean Lower Low Water North American Datum 1983 Projected UTM 18 40000

Affected Products

ENCs RNCs US3DE01M

Junction Surveys H13417 H13416 H13393

Survey Equipment

Vessel(s) Chief(s) of Party NOAA Ship THOMAS JEFFERSON Briana W. Hillstrom, CDR/NOAA

Manufacturer Model Instrument Type AML Oceanographic MVP-X Conductivity, Temperature, and Depth Sensor AML Oceanographic MVP100 Conductivity, Temperature, and Depth Sensor Valeport Thru-Hull SVS Sound Speed System Kongsberg Maritime EM 2040 MBES Klein Marine Systems System 5000 SSS Applanix POS MV 320 v5 Positioning and Attitude System

Source Data at NCEI

Data in Archive Size (in GB) Date Archived Data Types Surveyed Raw and Processed 295.484 2021-12-30 20:32:16.0 BACKSCATTER, BATHYMETRY