Marine Geoscience Seismic Data SystemAccess for education and research

Field Data Center (LDEO)

Marine Seismic Data Center (UTIG)

April 2007

Scope and Goals

• preserve U.S. academic digital seismic reflection data and supporting information

• help investigators share project data and products• help define and unify seismic-related metadata

April 2007

Seismic System Components

• Field Seismic Data Center (LDEO)– serves digital field data

• R/V Ewing 57 cruises 1990-2005• R/V Langseth (operational September, 2007)

• Marine Seismic Data Center (UTIG)– serves digital processed products

• stacks, migrations, SCS, UTIG OBS, 3D, chirp, etc.

– serves older (mostly UTIG) field data from 85 cruises– serves other types of seismic data not otherwise being

preserved

April 2007

Marine Seismic Data Center (MSDC)• Collect and serve

– acquisition and processing info

– SEG-Y binary data– create trace geographic positions, line-by-line– create annotated raster images

Cruise-organized metadata

April 2007

MSDC Metadata

Follow FGDC and developing ontologies for marine and seismic data. Developing interop with MGDS (with REST) tests metadata structure and convergence.

April 2007

MSDCAcquiring Metadata and Data

• Reluctance of some investigators to contribute processed data

• Addressed these concerns by:– pushing citation information with downloads

– sharing usage information with data providers

– allowing for access restriction• though metadata is all visible

• ultimate arbitrator is project funding agency

April 2007

MSDC Cumulative Contents

Year ending CruisesProcessed

SEGY FilesField SEGY

Files

2001 1,193 14,697

2002 4,798 16,028

2003 5,171 16,049

2004 6,007 16,148

2005 6,966 16,149

2006 161 8,109 17,068

Apr 2007 173 8,383 17,068

April 2007

MSDC Registration• Countries (62):

– 40% U.S.

– 6% United Kingdom

– 4% Canada, India

– 3% Germany, Australia, Brazil

• Enterprise:– 71% Academic & Government

– 20% Commercial

– 7% Personal

– 2% Undeclared

April 2007

MSDC User Activity

Year endingNew registered

users File transfers*

2001 25+

2002 65+

2003 130 1,116

2004 116 2,388

2005 138 4,507

2006 160 4,962

Apr 2007 76 (+41) 3,030

*=SEGY, navigation and large images +estimated

April 2007

MSDC Tool Set• view and select SEG-Y, images, navigation

- map-based search

- metadata-based search

- Google Earth formatted files

• external access to metadata- xml metadata service in development

- map services support (www.ig.utexas.edu:8080/geoserver/wms)

• custom seismic images• automated download cart

April 2007

Custom Images

• create custom images with window selection, aspect ratio, filtering and amplitude control.

• produces gif and pdf files.

April 2007

Selection and Downloading

• Selection is done from maps, lists and captions.

• Automated system with intervention only when restricted data sets are requested.

• Contributors are supplied monthly with information on downloads to help overcome reluctance to contribute and share data.

April 2007

Comprehensive Discovery?

April 2007

MARGINS: Costa Rica Discovery

April 2007

MARGINS: Costa Rica Evaluation

April 2007

MARGINS: Costa Rica Discovery

April 2007

Data Discovery• creating comprehensive catalogs for users will:

– simplify search– map-based discovery more valuable to users for some data, such as

seismics• both catalogs and maps provide paths to more information and data

• challenge--the comprehensive part– for example, U.S. seismic data

• just in the U.S. there are (more than) 6 institutions with seismic data• because funding and individual and institutional priorities vary widely,

some will never participate

– efficient mapping method issues• WMS/WFS large files, slow (unless windowed or decimated)• Google Earth virtual globe (maybe, but commercial product limitations)

– well-known educational and cross-generational browser– data provider controls information in the placemark, has complete ‘ownership’ control