JavaTM HDF Viewer (JHV)
User's Guide

Version 2.2
August 1998




The JavaTM HDF Viewer (JHV) is a graphic utility designed for easily viewing the contents of HDF files.

This document provides the following information:

Details of HDF library and its APIs are available from The NCSA HDF Home Page (at http://hdf.ncsa.uiuc.edu/).


Table of Contents

1 Introduction
1.1 Overview
1.2 JHV Features
1.3 Limitations
1.4 System Requirements
1.5 Installing and Running JHV

2 Getting Started
2.1 Starting the Program
2.2 Loading a File
2.3 Displaying Information
2.4 Setting the View Options
2.5 Viewing the Online Guide

3 Opening HDF Data Objects
3.1 File and Data Object Annotations
3.2 Raster Images
3.3 Scientific Data Sets
3.4 Vdatas, or Tables
3.5 Vgroups

4 Manipulating Images in the Image Window
4.1 The Image Window
4.2 Opening the Image Window
4.3 Menu Commands
4.4 Image and Zoom Panels
4.5 Control Buttons

5 Image Processing
5.1 Image Editing
5.2 Image Filtering
5.3 Image Contour

6 Image and Data Analysis
6.1 Image Values
6.2 X-Y Plots
6.3 Histograms
6.3 Data Transformations

7 Animation
7.1 Opening the Animation Window
7.2 Animation Options and Color Management

8 Image Overlays
8.1 Opening the Image Overlay Window
8.2 Overlay Options

9 Spreadsheets and Plots
9.1 Image Spreadsheets
9.2 Vdata Spreadsheets
9.3 Vdata X-Y Plots

10 The Palette Editor
10.1 Palette Editor Window
10.2 Palette Menu
10.3 Palette Options
10.4 Saving a New Color Palette

11 Using ASCII HDF Files, or Text Files
11.1 Reading, Writing, and Working with ASCII Files
11.2 Converting an ASCII File to an HDF File

Appendix A: Specification of the HDF ASCII Interchange Format (HAIF)
A.1 Introduction
A.2 Specification of the HDF ASCII Interchange Format
A.3 An Example


List of Figures


NCSA
The National Center for Supercomputing Applications

University of Illinois at Urbana-Champaign

hdfhelp@ncsa.uiuc.edu