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Office of National Marine Sanctuaries, 2024: Olympic Coast National Marine Sanctuary - mos110_0204c.tif - Multibeam backscatter mosaic from survey area 110_0204c,

Item Identification

Title: Olympic Coast National Marine Sanctuary - mos110_0204c.tif - Multibeam backscatter mosaic from survey area 110_0204c
Short Name: mos110_0204c
Status: Completed
Publication Date: 2007-12-31

A multibeam backscatter image (0-35 m water depths) mosaiced from hydrographic data collected during a August/September 2003seafloor survey. A Reson 8101 multibeam echosounder (240 kHz) was hull mounted to NOAAS Rainier survey launch to acquire the sonar data. A Applanix POS/MV was used to compensate for vessel motion and a Seabird SVP 19 plus was used to measure sound speed. Navigation and line planning were accomplished using Hypack software using a CSI wireless DPGS. Sonar packets, motion sensor, and navigation data were logged in Isis Sonar as XTF files. Backscatter was normalized and mosaiced using software developed by the University of New Brunswick Ocean Mapping Group.


The data can be used with geographic information systems (GIS) software to display various seafloor characteristics. These data are intended for science researchers, students, policy makers, and the general public.




Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
ISO 19115 Topic Category
NOS Data Explorer Topic Category Environmental Monitoring
None Coastal Geology
None Isis
None Marine Geology
None Multibeam Backscatter
None Remote Sensing Image
None Reson

Spatial Keywords

Thesaurus Keyword
None Cake Rock
None Carroll Island
None Lapush
None Olympic Coast
None Sealion Rock
None Washington

Physical Location

Organization: Office of National Marine Sanctuaries
City: Silver Spring
State/Province: MD

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: remote-sensing image
Distribution Liability:

Please recognize the Olympic Coast national marine sanctuary (OCNMS) as the source of these data. The Olympic Coast National Marine Sanctuary nor any of their employees, make any warranty, express or implied, including the warranties of merchantability and fitness for a particular purpose, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights. Original data elements may have been compiled from various sources. Spatial information may not meet National Mapping Accuracy Standards. This information may be updated, corrected, or otherwise modified without notification. For additional information about this data contact the Olympic Coast national marine sanctuary.

Data Set Credit: Steven S. Intelmann

Support Roles

Data Steward

CC ID: 499723
Date Effective From: 2007-12-31
Date Effective To:
Contact (Position): OCNMS GIS Coordinator
Address: 115 East Railroad Ave Suite 301
Port Angeles, WA 98362
Email Address:


CC ID: 499725
Date Effective From: 2007-12-31
Date Effective To:
Contact (Position): OCNMS GIS Coordinator
Address: 115 East Railroad Ave Suite 301
Port Angeles, WA 98362
Email Address:

Metadata Contact

CC ID: 499726
Date Effective From: 2007-12-31
Date Effective To:
Contact (Position): OCNMS GIS Coordinator
Address: 115 East Railroad Ave Suite 301
Port Angeles, WA 98362
Email Address:

Point of Contact

CC ID: 499724
Date Effective From: 2007-12-31
Date Effective To:
Contact (Position): OCNMS GIS Coordinator
Address: 115 East Railroad Ave Suite 301
Port Angeles, WA 98362
Email Address:


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 499729
W° Bound: -124.723726
E° Bound: -124.636953
N° Bound: 47.991864
S° Bound: 47.888594

Extent Group 1 / Time Frame 1

CC ID: 499728
Time Frame Type: Discrete
Start: 2003-08-15

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Grid Representation 1

CC ID: 587555
Dimension Count: 3
Cell Geometry: Point
Transformation Parameters Available?: No

Axis Dimension 1

Dimension Type: Row
Size: 11347

Axis Dimension 2

Dimension Type: Column
Size: 6236

Axis Dimension 3

Dimension Type: Vertical
Size: 1

Access Information

Security Class: Unclassified
Data Access Constraints:


Data Use Constraints:

Please recognize OCNMS as the source of this information. Not to be used for navigation.



CC ID: 499721
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 499748
Activity Date/Time: 2008-06-15

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 499747
Activity Date/Time: 2017-04-05

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 587553
Activity Date/Time: 2017-09-13

Partial upload of Spatial Info section only.

Activity Log 4

CC ID: 718899
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Technical Environment


Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog

Data Quality

Horizontal Positional Accuracy:

Accuracy of the horizontal coordinates is on the order of 10-30m based on the uncertainty in position of side scan sonar towfish relative to ships DGPS position. Horizontal layback is more accurate than lateral offsets since any lateral offset in the towfish position (due to side currents) is unaccounted for in the layback calculations.

Completeness Report:


Conceptual Consistency:

Not Tested


Process Steps

Process Step 1

CC ID: 499694

Sonar packets, attitude and position data logged in Isis Sonar.

Process Step 2

CC ID: 499695

XTF conversion to Caris HDCS format.

Process Step 3

CC ID: 499696

Swath editing and subset editing of multibeam bathymetry data in Caris Hips

Process Step 4

CC ID: 499697

Build PFM dataset in Fledermaus by importing Caris HDCS libraries.

Process Step 5

CC ID: 499698

Area-based editing of multibeam bathymetry in Fledermaus

Process Step 6

CC ID: 499699

Dump PFM edits of multibeam bathymetry back into the Caris HDCS libraries.

Process Step 7

CC ID: 499700

Using Caris Hips, export day, time, profile, and beam for all rejected soundings for each line file as individual text files.

Process Step 8

CC ID: 499701

Unravel the XTFs to OMG format to create merged files specific to sonar (ie 8101).

Process Step 9

CC ID: 499702

Filter soundings on Reson quality Flags

Process Step 10

CC ID: 499703

Load HDCS rejected flags for previous Caris export process.

Process Step 11

CC ID: 499704

Convert XTF navigation to OMG format.

Process Step 12

CC ID: 499705

Copy vessel configuration for each survey line.

Process Step 13

CC ID: 499706

Reduce bathy data by merging orientation and raytrace using svp data.

Process Step 14

CC ID: 499707

Invert heave data -- XTF opposite of OMG convention.

Process Step 15

CC ID: 499708

Compile decimated navigation data for quick viewing.

Process Step 16

CC ID: 499709

Thin navigation removing redundant points.

Process Step 17

CC ID: 499710

Merge navigation into bathymetry.

Process Step 18

CC ID: 499711

Make DTM and sun illuminate.

Process Step 19

CC ID: 499712

Compute angular response curve estimates from backscatter by using a rolling bin of 100 pings. DTM is used for grazing angle estimation.

Process Step 20

CC ID: 499713

Generate calibrated backscatter for ri theta, snippets, and side scan packets specific to sonar type(ie 8101 or 8125) using rolling beam pattern

Process Step 21

CC ID: 499714

Fill lone pixels (cosmetics)

Process Step 22

CC ID: 499715

Mosaic lines using autoseam option (splits adjacent lines and sews seam) and auto_dg (down samples to mosaic resolution to avoid aliasing.

Process Step 23

CC ID: 499716

Calculate histogram and apply stretch to DN values.

Process Step 24

CC ID: 499717

Export mosaic from OMG as pgm file.

Process Step 25

CC ID: 499718

Convert PGM file to TIF file using linux XV utility.

Process Step 26

CC ID: 499719

Create tif world file from mosaic bounds file.

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity mos110_0204c.tif.vat

Catalog Details

Catalog Item ID: 40083
GUID: gov.noaa.nmfs.inport:40083
Metadata Record Created By: Tyler Christensen
Metadata Record Created: 2017-04-05 14:27+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:10+0000
Metadata Record Published: 2018-02-08
Owner Org: ONMS
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-02-08
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-02-08