visivo tutorial (pdf) - vobs.it

Exploiting DCIs for Visualisations in Astrophysics:

VisIVO Science Gateway Tutorial

Eva Sciacca eva.sciacca@oact.inaf.it

VisIVO Team – Team Leader Ugo Becciani

INAF- Astrophysical Observatory of Catania

Outline Background

• Visualisation and Analysis Tools

VisIVO Science Gateway

• Portlets and workflows

VisIVO Mobile

Hands-On Session

Supplementary Material

Outline Background

• Visualisation and Analysis Tools

VisIVO Science Gateway

• Portlets and workflows

VisIVO Mobile

Hands-On Session

Supplementary Material

VisIVO Tools Multidimensional Data Exploration

Discovery of unknown data characteristics

Searching for:

Outliers

Characteristic regions

Special properties

Large astrophysical datasets as well as any other multidimensional tabular data from other communities.

VisIVO is designed to deal with large datasets. It supports many types of data formats:

HDF5, VOTables, Binary Tables, Ascii , csv, fits…

5

--fformat votable /home/user/demo/vizier.xml ..... --x x --y y --z z --color --colortable --colorscalar scalar0 --glyphs sphere

VisIVODesktop

VisIVOServer

VisIVO Science Gateway

Linux Mac Windows

Interactive fast data

visualisatio

Closely integrated, complementary and independent !

VisIVO C/C++ Library

VisIVOMobile

VisIVO Core Tools

6

Local or Remote (URL) User Data

VBT: VisIVO Binary Table

VisIVO Importer

VisIVO Filters

VisIVO Viewer

New VBT

https://sourceforge.net/projects/visivoserver

VisIVO Filters MLR : Different level of randomization can be given, creating more detail table

in the inner sphere and lower detail in the outer regions, or vice versa

Extract Subregion: Creates a new table from an input table: sub-box or sphere

extraction.

Extract Subvolume: Produces a table which represents a subvolume from the

original volume

Math. Operations: Creates new fields in a data table as the result of a mathematical

operation between existing fields

Point Distribution: Creates a volume using a field distribution on a regular mesh

Select Rows: Creates a new table using limits on one or more fields of a data table

VisIVO Viewer

VisIVO Viewer is a command line application that produces 3D images from the binary

internal data format table (VBT) The user must specify three fields of the table for 3D representation. The user can also customize the view by choosing values such as: - Camera (azimuth/elevation or position, zoom) - Opacity - Point shape (pixel/sphere, cube, cone etc..) - Palette - …… - Alternatively, but in a more intuitive way. A view can be generated by

giving the camera and focal point position OUTPUT: VTK / SPLOTCH

Navigation -- Zoom -- Palette -- Algorithms -- Data selection --

Picker op.

Outline Background

• Visualisation and Analysis Tools

VisIVO Science Gateway

• Portlets and workflows

VisIVO Mobile

Hands-On Session

Supplementary Material

VisIVO Gateway The VisIVO Science Gateway is designed as a workflow

enabled grid portal that is wrapped around WS-PGRADE/gUSE providing visualization and data management services to the scientific community.

The gateway offers role-based authorization modules and supports login with user name and password.

Advanced User, can develop and configure workflow. All WS-PGRADE/gUse functionalities are available.

Standard User uses Workflow developed by a “workflow developer” via a web GUI.

Architecture

Portlets…

… and workflows

Outline Background

• Visualisation and Analysis Tools

VisIVO Science Gateway

• Portlets and workflows

VisIVO Mobile

Hands-On Session

Supplementary Material

VisIVO Mobile

VisIVO Mobile

• Navigate through the data produced on the VisIVO Science Gateway: view produced images and scientific movies;

• Interactive 3D view of the dataset;

• Submit existing workflows;

VisIVO Mobile

• Navigate through the data produced on the VisIVO Science Gateway: view produced images and scientific movies;

• Interactive 3D view of the dataset;

• Submit existing workflows;

• Create new workflows using the graph editor

Outline Background

• Visualisation and Analysis Tools

VisIVO Science Gateway

• Portlets and workflows

VisIVO Mobile

Hands-On Session

Supplementary Material

Hands On Session Open VisIVO Gateway Home Page at:

http://visivo.oact.inaf.it:8080

Login with the user name and password.

Download a sample data-set from:

https://dl.dropboxusercontent.com/u/45733492/VisIVODemo_dataset.zip

Hands On Session Navigate to «VisIVO Tools»

Hands On Session Import your data from: dataset/ascii_table

on VisIVO Importer module Set the

optional

description

Click on

«Select File » to

browse to your

Dataset

Click «Submit»

Hands On Session When ready the dataset will be available in the

FileManagement module.

Double click on it to inspect the related meta data.

Hands On Session Click on «VisIVO Filter» to apply filtering operations on

the data or right click on the FileManagement item and select «Filter»

Select «Randomizer» operation and insert 50 as percentage

Click Submit

Inspect the meta

data of the result

Hands On Session Click on «VisIVO Viewer» to visualize the data or right

click on the FileManagement item and select «View»

Click on «View» button to create the 3-D image

Click on «Save» to

Store the image on

FileManagement

Hands On Session Play with the cube widget to set a new camera position

Click on «View» button to create the 3-D image

Click on «Save» to

Store the new image

on FileManagement

Hands On Session Right click on the FileManagement item and select

«Customized Movie» (at least 2 images must be produced for the dataset).

Select the 3-D images and set the clip order.

Click Submit

Hands On Session Right Click on the original dataset «clusterfields4.ascii»

and select «Filter»

Select «Point Property» operation

Check «Append»

Click Submit

Hands On Session Click on «VisIVO Viewer» to visualize the data or right click on the

FileManagement item and select «View» Check «Basic Palette» and select Color Scalar «PointProperty» Click on «View» button to create the 3-D image Click on «Save» to Store the image on FileManagement Try at least two different Camera Positions

Hands On Session Right click on the FileManagement item and select

«Customized Movie» (at least 2 images must be produced for the dataset).

Select the 3-D images and set the clip order.

Click Submit

Hands On Session View the result

Hands On Session Import your data from: dataset/bin_volume on VisIVO Importer module Set Binary File Type Set «Volume» Click on

«Select Header File » to browse to surface.bin.head

Click on «Select File » to browse to

surface.bin Click «Submit»

Hands On Session Click on «VisIVO Viewer» to visualize the data or right

click on the FileManagement item and select «View»

Click on «View»

button to create the

3-D image

Click on «Save» to

Store the image on

FileManagement

Hands On Session Right click on the FileManagement image item and

select «Panoramic Movie»

Click «Panoramic Movie»

Hands On Session View the result

Outline Background

• Visualisation and Analysis Tools

VisIVO Science Gateway

• Portlets and workflows

VisIVO Mobile

Hands-On Session

Supplementary Material

Supplementary Material SCI-BUS Project: http://www.sci-bus.eu Er-Flow Project: http://www.erflow.eu WSPgrade/gUse: http://www.guse.hu VisIVO Science Gateway: http://visivo.oact.inaf.it:8080 Portlet Repository: https://scibus-repo.cpc.wmin.ac.uk