04/12/23 HDF and HDF-EOS Workshop XI, Landover, MD 1

HDF and HDF-EOS Workshop XI, Landover, MD

November 6 – November 8, 2007

Pedro Vicente Nunes

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Space Research Software

http://www.space-research.org/

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Introduction

•What is HDF Explorer ?•HDF, HDF5 and netCDF data reader, visualization tool

•Summary of presentation•Several Image options with the discrete Map view, Continuous Map view and Vector View

•HDF5 Dimension Scales features

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Access data

1) Browse object tree

1) Right-click on objects to get menu

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Grid View

•An Excel like grid with each cell an element datum

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Discrete Map View

• Data is visualized as a map of colors. The colors are associated with a discrete range of values.

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Map options

• In the Draw options dialog box the user can choose to draw the color of each cell and to draw a grid surrounding each cell.

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Map options

• Now the grid is drawn

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Fill options

•Ignore or not a fill value in the making of the map, that is, the fill value is not translated to a color. The user also has an option to draw the fill value border in the grid.

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Fill options

•A map with the fill values not translated to a color

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Dimension options

•Choose to visualize or not the dataset dimensions (values in legend) in the map

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Axis options

•Options to draw space dimensions information (north, south, east, west, distance between ticks)

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Size options

•Change the size of the image

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Legend options

•Change the values of the legend discrete intervals

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HDF5 Dimension scales (H5DS)

•Allows choosing of one of several Dimension Scales datasets to be shown either in grid or map view

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HDF5 Dimension scales

•Click over each one of the dimension scales to select it. All available dimension scales are shown for each dimension

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One map with a set of H5DSs

•1 - 2.2

2.2 - 3.4

3.4 - 4.7

4.7 - 5.9

5.9 - 7.1

7.1 - 8.3

8.3 - 9.6

9.6 - 11

11 - 12

1030

1030

100 300

100 300

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Another set of H5DSs on the same dataset

•1 - 2.2

2.2 - 3.4

3.4 - 4.7

4.7 - 5.9

5.9 - 7.1

7.1 - 8.3

8.3 - 9.6

9.6 - 11

11 - 12

10

100

300

10

100

300

100 200 300 400

100 200 300 400