NASA Home Page Goddard Space Flight Center Home Page
NASA Logo - Goddard Space Flight Center   + Visit NASA.gov
a directory of Earth science data and services Global Change Master Directory Web site
header 2 bullet Links bullet FAQ bullet Contact Us bullet Site Map
Home Data Sets Data Services Learn about GCMD_legacy's portal collaborations. Add new dataset or dataservice records to GCMD_legacy What's New Participate Calendar About GCMD_legacy
 
Record Search Query: ServiceParameters>METADATA HANDLING>DATA DISCOVERY

Vertex: ASF’s Data Portal
Entry ID: ASF_Vertex
[ Get Service ]
[ Update this Record ]


Summary
Abstract: ASF has developed and deployed a user interface to highlight the contents of the pre-processed ASF SAR Datapool. Vertex is an intuitive user interface that facilitates the search for and visualization of ASF Datapool assets, delivery of relevant metadata about those assets, and facilitates the bulk delivery of those ASF data. Vertex is designed to familiarize users with SAR data without requiring any prior knowledge of SAR platforms, beam modes or processing parameters.

Vertex is a one page user interface comprised of functional modals for quick data visualization and access. Required search parameters are limited to a geographic region of interest (Figure 1) or a defined granule list supplied by the user. Initial searching is, by default, all SAR platforms with data archived at ASF, thus maximizing the visibility of all platforms in the ASF archive to all users.

Vertex search returns provide thumbnail imagery of all SAR products, with the exception of RADARSAT-1, and basic metadata for all search results. Within the search results list, you can click anywhere in a given returned cell and access the product profile page (Figure 2) for that particular granule which contains a low resolution browse image, expanded metadata from the return cell, as well as the ability to add processed products to your Download Queue, all without having to be a NASA approved scientist. By scrolling through the search return list, frames are highlighted on the map as you scroll over the returned cells allowing the researcher to gain geographic orientation for any individual granule. Historically, ASF search interfaces have imposed a 1000 granule limitation on search returns which has proven unsatisfactory for many users. In response, Vertex has no numerical limitations such as this, and narrowing the field of search returns relevant to a given scientific question is aided by a suite of platform specific post-search filters.

All satellite borne sensors have a suite of post-search filters specific to orbits, flight directions, off-nadir angles or paths. A textual filter called the “Find” box appears in the top right corner of every search, and allows textual filtering for parameters of interest (Figure 3).

All ASF DAAC users with an approved proposal have full access to download SAR data through Vertex, either as individual granules or via a bulk delivery method available through the download queue. The login modal supports established users’ ability to log in to Vertex with their existing DAAC user ID and password. The registration button within the login modal provides the information on how to acquire a NASA approved account, which grants access to restricted data from the ASF Datapool for download.

The download queue is a great way to manage valuable search results. Either through the profile page or via the return cell itself, a user can add an item directly to the download queue (Figure 4), as well as remove items without having to open the download queue specifically, though removal of granules form the download queue is also an option. The contents of the download queue can be delivered via one of the bulk download clients for the Metalink file format, available through the queue and the ASF bulk download informational page, as a csv file with direct download links, or as a kml file additional for visualization in Google Earth. All data delivered through Vertex is http accessible as zip files for approved users.

Additional features of Vertex include an integrated feedback mechanism, accessible by selecting the Feedback button at the top of the Vertex page. Through this feedback mechanism, users are able to submit feedback directly to the Vertex Google Group, a forum monitored by all members of the ASF staff that are directly working to improve the user experience through Vertex, and which is directly accessible via e-mail at: asf-vertex@googlegroups.com . Of course, users are always welcome to provide feedback via e-mail to uso@asf.alsaka.edu or via phone at 907-474-6166

Related URL
Link: GET SERVICE
Description: Access the ASF’s Data Portal.
Service Citation
Originators: Alaska Satellite Facility
Title: Vertex: ASF’s Data Portal
Release_Date: 2012
Provider: Alaska Satellite Facility
URL: http://www.asf.alaska.edu/program/sdc/vertex
ISO Topic Category
ELEVATION
GEOSCIENTIFIC INFORMATION
IMAGERY/BASE MAPS/EARTH COVER
Access Constraints
There are no constraints for access to the portal.

All ASF DAAC users with an approved proposal have full access to download SAR data through Vertex, either as individual granules or via a bulk delivery method available through the download queue. The login modal supports established users’ ability to log in to Vertex with their existing DAAC user ID and password. The registration button within the login modal provides the information on how to acquire a NASA approved account, which grants access to restricted data from the ASF Datapool for download.
Service Provider
Alaska Satellite Facility

Service Provider Personnel
Name: ASF DAAC USER SUPPORT
Phone: (907) 474-6166
Fax: (907) 474-2665
Email: uso at asf.alaska.edu
Contact Address:
Alaska Satellite Facility
Geophysical Institute
University of Alaska Fairbanks
PO Box 757320
City: Fairbanks
Province or State: AK
Postal Code: 99775-7320
Country: USA
Distribution Media
Distribution_Media: Online
Fees: No fees
Personnel
ASF VERTEX SUPPORT
Role: TECHNICAL CONTACT
Email: asf-vertex at googlegroups.com

ASF DAAC USER SUPPORT
Role: TECHNICAL CONTACT
Phone: (907) 474-6166
Fax: (907) 474-2665
Email: uso at asf.alaska.edu
Contact Address:
Alaska Satellite Facility
Geophysical Institute
University of Alaska Fairbanks
PO Box 757320
City: Fairbanks
Province or State: AK
Postal Code: 99775-7320
Country: USA

TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Creation and Review Dates
SERF Creation Date: 2012-02-21
SERF Last Revision Date: 2012-02-21
[ Update this Record ]
USA dot gov - The U.S. Government's Official Web Portal NASA
Webmaster:  Monica Holland
Responsible NASA Official:  Lola Olsen
Last Updated:  April 2014