May2006Abstracts < IVOA

IVOA Web>IvoaEvents>InterOpMay2006>InterOpMay2006Applications>May2006Abstracts (2006-05-17, InakiOrtiz) (raw view)
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---+++ Abstracts for [[IVOA.InterOpMay2006Applications][Applications Interest Group Sessions]] at the May 2006 IVOA Interoperability Meeting

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#AnchorA *VOQuest: A tool to query Source Catalog Data Model aware services*

VOQuest is an application that provides access to services
implementing a specific data model. To do so, VOQuest makes use of a
bunch of VO standards and protocols like ADQL, VOTable, SkyNode and
PLASTIC. Besides that, this tool is able to interoperate with existing
VO applications like VOSpec, Topcat and Aladin to relegate some specific
functionality already present in such tools in mature state.
As a technology demonstrator this application, and the architecture
hidden beneath it, is at a prototype stage.

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#AnchorB *New visualisation features in TOPCAT*

TOPCAT is an interactive application for manipulating tabular data
   such as source catalogues, increasing in popularity with VO and
   non-VO users.  Version 2.0, released Feb 2006, provides considerably
   improved visualisation facilities including histograms, density
   maps and 3-d plotting.  A demonstration of these new features
   will be given.

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#AnchorC  *WCSFixer*

WCSFixer was one of high-priority apps identified by the NVO
Science Steering committee and provides a method for solving/improving
the WCS of images.  It uses standard VO protocols for accessing reference
catalog data and makes use of legacy software (IRAF) to do the computation.
Additional VO Tools (i.e. the STILTS toolkit from Mark Taylor) are used
to manage VOTables in the legacy environment and the webapp itself is
simply a CGI-POST script with embedded !JavaScript to drive the interface,
however standard SOAP/WSDL web services and desktop client applications to
call it remotely as a commandline task will soon be available as well.
It is currently undergoing revision with a new version expected in time
for the meeting.  Community usage has exposed data-quality problems/issues 
for real-world applications, as well as limits imposed by choice of
algorithm.

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#AnchorD *Interactive Visualizations with GESTALT and World Wind*

Using mapping packages from the geophysics community and the World Wind
interface developed by NASA, we have created a number of tools for visualizing
astronomical data on the sky.  The interface projects imaging data as well as
footprint maps (coverage, overlap and background) onto the sphere and allows
users to scan around the sky, zoom and overlay different data sets on top of
each other.  Images are generated in a range of resolutions, dynamically
served to the client using a Web Mapping Server (WMS) based on the current
viewing window and projected onto the sphere.  Our WMS server at Pitt is
currently serving maps for the fourth Sloan Digital Sky Survey data release
(SDSS DR4) and the Wilkinson Microwave Anisotropy Probe full sky cosmic
microwave background map as well as coverage maps for the SDSS DR5 and the
FIRST radio survey.  Since we went live in mid April we have served nearly
90GB of imaging to roughly 80,000 unique IP addresses from all over the globe.

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#AnchorE *New VO Applications at the HEASARC*

We demonstrate the new Java / !JavaScript version of !DataScope and
  a distributable version of the !SkyView virtual telescope.  The new
  !DataScope illustrates how AJAX technologies can make Web based
  VO experiences more responsive.  The !SkyView-in-a-Jar illustrates
  how the VO's SIA protocols exactly complements the internal geometry
  capabilities of !SkyView. 

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#AnchorF *Saada and the VO: How to query heterogeneous datasets*

Databases generated with Saada are designed to host heterogeneous data
collections. In this context, data can be selected by providing collections
with some common interface such as a common spectral coordinate system and by
expressing contraints with UCDs.

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#AnchorG *DALIA interface and BASECOL*

Basecol is a combination of a website (using PHP and HTML) and a !MySQL database concerning molecular ro-vibrational transitions induced by collisions with atoms or molecules. This database has been created in view of the scientific preparation of the Heterodyne Instrument for the Far-Infrared on board the Herschel space observatory (HSO).
Basecol offers an access to numerical and bibliographic data through various output methods such as ASCII, HTML or VOTable . Several services are available to access the database from client software.
DALIA is an application in development that will provide a generic interface to modelisation codes. Model developers will be able to register their code in this framework through a simple procedure. An optimization engine will be provided through a GUI for fitting of the code outputs to real observations. A connection to Basecol using the SLAP protocol is implemented in order to get spectroscopic data and transmit them to the codes when they are required.
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#AnchorH *VOEvent Client Software*

VOEvent is the new IVOA standard for representing transient astronomical
events. We present our client software for subscribing and publishing VOEvent
packets.

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#AnchorI *1 Easy access to the VO through the !AstroRuntime*  

The !AstroRuntime is a desktop application that serves as a bridge between user tools and external VO services.  Applications written in any language can use the AR to easily access any VO service: including VOSpaces, Registries, CEA applications, SIAP servers...

*2 Binding applications with PLASTIC*

PLASTIC is a simple, extensible, platform-agnostic protocol for communication between desktop applications.  

*Aladin/Topcat interoperability using PLASTIC*

Using Aladin and Topcat, I will demo what kind of interoperability can
be achieved between desktop tools through the PLASTIC (PLatform for
AStronomical Tool !InterConnection) protocol. In particular, I will show
that PLASTIC allows flexible collaborative data exploration through
linked views (eg : the selection of points in one tool is being
reflected in the other tool).


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#AnchorK *VODA - A Discovery and Visualisation Tool using a Virtual Directory*

The Sampo project has developed a prototype general purpose VO application
using standard IVOA protocols and the ACR facade from Astrogrid for access to
external VO resources. VODA allows browsing and resource discovery in the VO
and the management of a Virtual Directory of data references. The Virtual
Directory forms a local, presistent personal view of the VO where referenced
data sets may be downloaded or directly passed to visualisation tools such as
Aladin, fv or DS9. We are currently experimenting with the use of Plastic as a
general purpose connection between VODA and VO tools.  VODA also offers the
possibility for client-side applications to access VO resources via the
Virtual Directory. We will describe the motivation and implementation
experiences as well as giving some simple examples of VODA in action. .
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#AnchorL *Visualizing Multi-Dimensional Astrophysical Data: !VisIVO and interoperability*

We present !VisIVO and its PLASTIC integration.
The attention  will be focused both on client and on server sides of !VisIVO interoperability
towards the other PLASTIC-aware applications.


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#AnchorM *Displaying instrument !FoVs (field of view) in Aladin*

In addition to a hard-coded list of !FoVs for major instruments, Aladin
is now able to display arbitrary instrument !FoVs loaded from an XML file
(whose format is described in the IVOA note ...)
I will demonstrate how those !FoVs can be loaded and manipulated in
Aladin. The user can move or roll each !FoV, hide or show some subparts,
and monitor those changes through the Properties window or through the
standard input via the Aladin script commands.

A !FoV can be displayed on its own, or be linked in a VOTable document to
a given observation, for instance in an observation log.
This !FoV feature is notably being used by the APT (Astronomer's Proposal
Tool) software, in conjunction with the VOApp interface.

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#AnchorN *CVO developments*

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#AnchorO *VO Application interoperability study*

Comparison of the VOApp solution and the PLASTIC solution.

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Topic revision: r8 - 2006-05-17 - InakiOrtiz
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