本文へ移動

サイトナビゲーションへ移動

検索ボックスへ移動

サイドバーへ移動

ここは、本文エリアの先頭です。

PALSAR-2 Global Water Map

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EER40100

Subject Category: Space Technology

PDF available here

  • Responsible Representative: Riko Oki, Earth Observation Research Center, Space Technology Directorate I
  • Contact Information: Sota Hirayama(hirayama.sota@jaxa.jp)
  • Members: Sota Hirayama, Naoyoshi Hirade, Koichi Imamura

Abstract

In the previous fiscal year, we conducted trial production in the Asian region, where ALOS-2/PALSAR-2 ScanSAR data are abundant, and were able to produce a high-resolution land-use and land-cover (HRLULC) map of the Asian region with a high overall accuracy of 86.2%. In order to further improve the accuracy, a global water map, which is also effective for LULC classification, was created from ALOS-2/PALSAR-2 data this fiscal year.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Accelerating large-scale high-resolution satellite image processing using machine learning with JSS3

Achievements of the Year

The use of JSS3 enabled the classification process, which originally took several days to several months, to be carried out in about one day. This allowed us to conduct many classification trials and create a global water map.

Annual Reoprt Figures for 2023

Fig.1: Global water bodies map in 2010

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: Parallel execution of shell script with xargs
  • Thread Parallelization Methods: N/A
  • Number of Processes: 2 – 10
  • Elapsed Time per Case: 10 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.02

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 757.60 0.00
TOKI-ST 65395.18 0.07
TOKI-GP 22111.80 0.29
TOKI-XM 7.34 0.00
TOKI-LM 0.00 0.00
TOKI-TST 1.92 0.00
TOKI-TGP 1015.61 78.16
TOKI-TLM 406.33 1.14

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 0.00 0.00
/data and /data2 51200.00 0.32
/ssd 5120.00 0.48

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

 

ISV Software Licenses Used

ISV Software Licenses Resources
ISV Software Licenses Used
(Hours)
Fraction of Usage*2(%)
ISV Software Licenses
(Total)
0.00 0.00

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report February 2023-January 2024