Shinobu Kawahito JAXA / RESTECKengo Aizawa, Satoko Miura JAXA

WGISS-23 @Hanoi

Update on Agricultural Services and Disaster Services projects

Agricultural Services - Overview

Prototype development in cooperation with collaborating agencies to

prove the usefulness of interoperable systems to support applications.

Purpose

Seeking more sufficient way to present observation data into higher level information rather than just showing images.

Recent Target: Present Information derived from EO Data

• Time Series Vegetation data is the major data.

• To determine the presence of a problem (e.g. drought), firstly, quantification is needed.

For Agricultural Monitoring (e.g. Drought Monitoring)

Agricultural Services with Time Series Data - Monitor and Detect Changes

Apr. 　　 May. 　　 Jun. 　　 Jul. 　　 Aug. 　 　 Sep. 　 Oct.

Vegetation Stages of crops

E.g. rules to interpret reduction in vegetation(drought vs. other cause)

Quantification of the vegetation data and comparison of them are initial stepsto interpret the data into a drought interpretation.

Current Year Vegetation Patterns

Interpretation

Criteria (e.g. Previous Year)

planting / early stage / growth stage / maturing / harvesting

Estimate the ImpactFind and Monitor Tendency

Decision Flow

current work scope

User Requests

i. MMI to present information in a user friendly way so that user can examine data to interpret vegetation information. (E.g.) Graphs with editable data ranges, period ranges. Easy switching of target data layer

ii. Quick response (small waiting time) iii. Re-use of data in user side (E.g. in KML format)

- Client - side Data Rendering (Visualize numeric data within end user’s browser )

- Data server to serve real NDVI data not only NDVI Image- Export image data in such as a KML file

User Requests

The way we will incorporate user requests

Region1 data1 date1 ave1 dev1 data1 date2 ave2 dev2...

System StructureData Server

・ Select Date/Period・ Select Data

Response

End User’s Browser

Time Series Vegetation Data

Request

< Control >

< Output >

< Data Process >

・ Data Visualization・ Graph Manipulation

Client System

Internet Internet

・ Gather Data ・ GIS Subset/Mask・ Count Statistics

・ Parse Request・ Control Process

・ Bind Results ・ Create Output 　　　

Polygons

Statistics Per Region

WMS/WCS

Quantification and Comparisonof Vegetation Changes per GIS Region

Provide quantified information:- Vegetation per Region- With comparative data

- Layers are quickly switchable

- Graph and Data Tables are quickly switchable

for easy data comparison and interpretation

19981999

1999

NDVI 1998 NDVI 1999

Disaster Services projects - Overview

Earth observation images are often utilized better with comments and interpretations.

• Present EO images and maps related with land condition, associated with general knowledge on land vulnerability.

• Develop prototype WMS system to prove concept.

Purpose

No. 1~10 :Flood Observed Points

What have done

-> Built web mapping system presenting marks and notes also, to show explicitly the focusing points.

Achievements

Present images with use cases- Provide optional menus to present pre-selected pairs of images with short

explanations how images could be interpreted, from the view point of potential land condition (against flood).

Geomorphological MapGeomorphological Map1.Flood region mostly corresponds to the vulnerable valley plain, …

< Example of Image Pairs and Use Cases (Interpretations) >

valley plain

Natural Levee

Land Use in 1997Land Use in 19972. By comparing with a land use map, you see the flood area mostly allocates to rice paddy, …

Rice Paddy

Necessity of Functional Enhancement

• Marks and comments, (and polygons) will be more valuable, if none-system developer (e.g. users, experts) can create those by themselves. (write-able application)

• Marks and comments, (and polygons) may be more useful, if those are associated with not only geo-location, but also with info such as which data they concern.

What is missing

• Export capability of data (and comments, polygons) to be re-used by users.

• Polygon will be helpful to precisely indicate the area of interests.

Comment Record associated with Location and EO Images

EO Image1 EO Image2 Thematic Map 1

Title : Creator : Comments :

＋

links

ａｂ

ｃ

ｄ

• Comments are descriptions (e.g. image explanations, interpretations, opinions) which are related to both geographical feature and dispersed stored images.

Possible comment record

Location : Feature data :

< General Info > < Geographical Feature >

• Field and format should be considered further.

WMS WMS WMS

Activities

Refine comment records’ field and format.

• Land Use in 1976, 1987, 1997 of the country

• Satellite Mosaic in 1990, 2000 of the country

• Thematic Maps

　 Adopt multiple data resources in WMS related to land use and land condition.

Consider the way to apply ALOS data to cultivate ALOS usage.

Expand functionality

Ongoing

Future Plan

• handle polygon in the application• write-able functionality to encourage user involvement

Overall Conclusion

Keep on close work with collaborative agencies to focus on usage–oriented investigation and development.

Focus on establishment of methods to translate Earth observation satellite data into information useful in agricultural services and disaster services.

Functions will be built in taken care of modularity so that components would be easily adopted into other application flexibly.