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Introduction to IDV

PRECIS Reading Workshop, 24 - 28 August 2009

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Overview

Integrated Data Viewer (IDV) Overview

IDV features• Supported data formats• Web enabled features

IDV as an Integrator

PRECIS demo with IDV

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What is the IDV?

• Unidata’s newest scientific analysis and visualization tool

• Freely available Java™ framework and reference application

• Provides 2- and 3-D displays of geoscientific data

• Stand-alone or networked application

• Built on VisAD library

© Crown copyright 2007

VisAD’s Data Model

• Designed to support virtually any numerical

data

• Metadata can be integrated into each data

object

• Supports mathematical operations as well as

evaluation and resampling of data

• Supports spatial and temporal co-location of

data

• Supports data sharing among different users,

different data sources and different scientific

disciplines

• May be used independently of the VisAD

display model

Gully erosion/deposition Gully erosion/deposition from VisAD-based from VisAD-based

DEMViewerDEMViewer

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Supported Data Formats

Scientific• Georeferenced netCDF data• Vis5D data• McIDAS/ADDE (satellite, radar, surface

and upper air)• Archive Level II radar

Social• ESRI shapefiles (e.g. map boundaries)• ArcInfo ASCIIGRID (e.g., DEM)• GeoTIFF• OGC Standards

Educational• HTML• QuickTime

NONO2 2 concentrations over Berlin, Germany concentrations over Berlin, Germany – data from netCDF, maps from shapefile– data from netCDF, maps from shapefile

The IDV can integrate displays of a variety The IDV can integrate displays of a variety of geoscientific and other data including:of geoscientific and other data including:

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Unique IDV Features

Interactive probes for dataset exploration

• Parameter readouts• Vertical profiles• Time/Height displays• Lat/Lon/Alt position

QuickTime capture and playback

Incorporation of educational materials

User defined formulas

Extensible framework

Extensive use of network resources

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Web Enabled Features Integrated HTML Viewer

IDV includes a customized HTML viewer

Viewer can be used to provide context with associated data displays

IDV displays can be easily embedded in the HTML

Can be used as a customized UI which controls the IDV

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Web Enabled Features Use of Java Web Start™

• Java Web Start can be used to load in the IDV from a web page

• JNLP files can include pointers to configuration files and bundles for customization

• Web Start provides automatic software updates

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IDV as an Integrator

• Integrating data from disparate data sources is easy with the IDV

• Data can come from local and remote locations

• Data on different projections are automatically remapped

• Data from different times are synced Isosurface of a climate variable, topography from

ASCIIGRID DEM file, and interstate highways and county outlines/labels from shapefiles.