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Introduction

This section gathers various actions to access data content from EPN-TAP services, including developments during EPN2020.

Only on-going discussions have been moved here.

VESPA user search interface / portal

• The main user interface is located here: https://vespa.obspm.fr
It queries all services at once (other modes are available), formats the results, and connects with VO tools and other environments (ObsParis)
Roadmap for developments: VESPA Portal

• A local VESPA portal can be installed on your machine. This is intended to access services which are only available locally (e.g., on a Virtual Machine) and are not exposed on the Internet.

• All generic TAP clients are also usable (e. g., TapHandle, TAP Library, TOPCAT, and Aladin from v10) but do not provide specific support for EPNCore-based services

EPN-TAP access from VO tools 

EPN-TAP client libraries have been developed and included in some VO tools during EPN2020: CASSIS, 3Dview (IRAP/CNRS)

Java implementation: https://gitlab.irap.omp.eu/OV-GSO-DC/EpnTAPClient/
PHP/JavaScript implementation: in dev, TBD

Added SAMP plug-ins

Several tools have been updated during EPN2020 to send / receive data through SAMP:

• A plug-in provides SAMP connectivity to QGIS v3.x (Jacobs / GEOPS) — EPN2020

This works under Debian. A pre-packed Virtual Machine is available from JacobsUni with Debian/QGIS/plug-ins installed, for use with other OS

Tutorials:
https://github.com/epn-vespa/tutorials/blob/master/vo_qgis_plugin/vo-qgis-plugin.md
https://github.com/epn-vespa/tutorials/blob/master/vo_qgis_plugin_2/vo-qgis-plugin-2.md

• This has been updated for QGIS v3 in EPN2024: QGIS with VO plugins

• A plug-in provides SAMP connectivity to ImageJ (ObsParis) - currently in input only
Installation and use: ImageJ

• MATISSE has been provided with SAMP during EPN2020 (ASI/ASDC): Update on integration MATISSE-VESPA

• Autoplot has been provided SAMP during EPN2020 (Iowa Uni): Available tools

Google Sheet Add-on

Allows to query EPN-TAP services from on-line documents: easy access interface through on-line Excel-like sheet (Graz)
The preview of the tool can be found here >> https://drive.google.com/open?id=0B5hOkAv922Z6OVlQLUJENDQxRTg
A short tutorial describing basic features and usage can be found here: https://drive.google.com/open?id=0B5hOkAv922Z6OU9fN3RyQ0JRZGc
(EPN2020 dev)

Links to various environments (tutorials)

Are being defined:

EPN-TAP files retrieving interface

A set of web services providing file URL in JSON format, intended for pipeline processing
See this page: File grabbing interface (fgi)

Python interface

Limited to grabbing VOtables sent from VESPA
Info here: VESPA usage for non VO people
TAP services can be queried from pyvo and astroquery, see https://github.com/epn-vespa/tutorials/tree/master/misc/Jupyter-notebook-access
(EPN-TA support scheduled in pyvo 1.5)

IDL interface

Limited to reading VOtables downloaded from VESPA
Info here: VESPA usage for non VO people
See example (IDL + python) of access here: https://github.com/epn-vespa/tutorials/blob/master/misc/Jupyter-notebook-access/VVEX_demo_private.ipynb


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