Source: http://hdfeos.org/workshops/ws04/presentations/Pedro/work4.ppt

1. HDF Explorer
By
Pedro Vicente
Space
Research,Inc
HDF-EOS
WORKSHOP IV
September 19, 20 & 21
2000
Landover, MD
www.space-research.pt

2. Topics
• News (since Workshop II)
Version 1.1 of HDF Explorer
HDF Inspector version 1.0
• Things to do next

3. HDF Explorer
• What is HDF Explorer ?
• HDF data reader and visualization
• Data in a tree browsable window
• Data loading of each item on user request
• Several options on image generation (SDS)
• Platform: Microsoft Windows

4. HDF Explorer 1.1
• Reads HDF5
• Better data management for large
datasets
• What is HDF Inspector ?
• Free downloadable program, shows
SDS (datasets) as numeric data (grid)

5. HDF Explorer 1.1
SDS image options
• Scalar and vector data image
generation
• Scalar data
– Discrete map
– Continuous map

6. SDS discrete map
10. -11.
1
2
10
20
30
40
50
60
70
80
90
11. -12.
2
2
60
60
55
55
50
50
45
45
40
40
35
35
30
30
25
25
20
20
15
15
10
10
5
5
12. -13.
2
3
13. -14.
3
3
10
Mohid Data Explorer
20
30
40
50
60
70
Temperature (s igma)
•Different grid cell size supported
80
90
14. -15.
3
3

7. SDS vector map
(velocity field)
10
20
30
40
35
35
30
30
25
25
20
20
15
15
10
10
5
5
1 0 cm /
s
•Combine 2 datasets (vector components)
10
Mohid Data Explorer
20
30
Horiz ontal v elocity (s igma)
40

8. HDF Explorer 1.1
• Demo

9. Things to do next
some questions
• HDF-EOS
• HDF4 or 5 based ?

10. Next on HDF Explorer
HDF-EOS
• Visualizing HDF-EOS data: not
as direct as “normal” HDF data
• HDF data: numeric arrays ,
images, text.

11. HDF-EOS visualization
items
Point data; we have geolocation, how do
we get the underlying map information ?
Possible solutions: provide user input to
choose this kind of data, combine with
other data (grid)
Lat
61.12
45.31
38.50
38.39
30.00
37.45
18.00
43.40
34.03
32.45
33.30
42.15
35.05
34.12
46.32
47.36
39.44
21.25
44.58
41.49
25.45
Lon
-149.48
-122.41
-77.00
-90.15
-90.05
-122.26
-76.45
-79.23
-118.14
-96.48
-112.00
-71.07
-106.40
-77.56
-87.25
-122.20
-104.59
-78.00
-93.15
-87.37
-80.11
Temp(C)
15.00
17.00
24.00
27.00
22.00
25.00
27.00
30.00
25.00
32.00
30.00
28.00
30.00
28.00
30.00
32.00
31.00
28.00
32.00
28.00
19.00
Dewpt(C)
5.00
5.00
7.00
11.00
7.00
10.00
4.00
14.00
4.00
8.00
10.00
7.00
9.00
9.00
8.00
15.00
16.00
7.00
13.00
9.00
3.00

12. HDF-EOS visualization
items
• Swath data
• Combine all the different types of
information (geolocation fields,
dimensions, dimension maps and
data fields ).How to show this
information ?

13. HDF-EOS visualization
items
• Grid data
• Generate the projection(s)