development of noaa and landsat image server using web map service n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Development of NOAA and Landsat Image Server using Web Map Service PowerPoint Presentation
Download Presentation
Development of NOAA and Landsat Image Server using Web Map Service

Loading in 2 Seconds...

play fullscreen
1 / 27

Development of NOAA and Landsat Image Server using Web Map Service - PowerPoint PPT Presentation


  • 297 Views
  • Uploaded on

Development of NOAA and Landsat Image Server using Web Map Service. Mr. Sarawut Ninsawat and Dr. Kiyoshi Honda. This project is a part of Education and Research Project for Sustainable Development in the Greater Mekong Sub Region supported by Japanese Government . . Background.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Development of NOAA and Landsat Image Server using Web Map Service' - Gabriel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
development of noaa and landsat image server using web map service

Development of NOAA and Landsat Image Server using Web Map Service

Mr. Sarawut Ninsawat and

Dr. Kiyoshi Honda

This project is a part of Education and Research Project for Sustainable Development in the Greater Mekong Sub Region supported by Japanese Government.

19th APAN Meeting in Bangkok

background
Background
  • GIS and remote sensing (RS) have been taking a leading role for sustainable development.
  • Many researchers have done numerous developments in utilizing GIS and RS data to various applications
  • The potential of Geoinformatics has not been fully realized in the sense that data accessibility, integrity and their integration with existing GIS databases.

19th APAN Meeting in Bangkok

slide3
Internet has high potential to give opportunities for people to access data easily.
  • Establishing a scheme to share and integrate geo-spatial information will contribute for the use of Geoinformatics in the society

19th APAN Meeting in Bangkok

purpose
Purpose
  • To develop Satellite image Map Server in AIT.
    • To establish mosaic image of LANDSAT over GMS countries.
    • Improve an access speed over WMS connection
  • To organize experiment for linking multiple Web Map Servers.

19th APAN Meeting in Bangkok

slide5

Introduction of web mapping technology

  • OpenGISConsortium (OGC) Specification
  • Standard interface between Client and Server
    • Possible to send the request as message format to multiple servers (to the distributed environment) and get the result both of text and graphic data.
    • Possible to develop own system independently

19th APAN Meeting in Bangkok

data being provided
Data being provided
  • NOAA/AVHRR NDVI image
    • the 30-day composite NOAA/AVHRR NDVI shown as FCC 121.
  • Landsat mosaic data
    • Mosaic data of Thailand and GMS countries using Landsat 5 (raw Landsat scence were downloaded from http://www.glcf.umiacs.umd.edu/index.shtml)
  • Map data
    • coastline, boundaries, road, river. (VMAPO data source)

19th APAN Meeting in Bangkok

30 day noaa avhrr ndvi
30-day NOAA/AVHRR NDVI

Jan 2001

Apr 2001

July 2001

Oct 2001

19th APAN Meeting in Bangkok

landsat mosaic
Landsat Mosaic
  • This dataset covers 5.4 million square kilometers. Eight scenes of data were unavailable from this system.
  • The original projection data is UTM with datum WGS84.
  • The data amount of the mosaic image from 105 Landsat scenes (composed of 4 bands) is around 40 GB.

19th APAN Meeting in Bangkok

tile index algorithm
Tile index Algorithm
  • When handling very large raster layers, it is convenient and higher performance to split the raster image into a number of smaller images. Each file is tile of the larger raster mosaic available for display.
  • The list of files forming a layer can be stored in a shapefile with polygon representing the footprint of each file, and name of the files.(called Tileindex)
  • Mapserver will first scan the tile index and ensure that only raster files overlapping the current display request will be opened.

19th APAN Meeting in Bangkok

system overview agriculture client example
System overview (Agriculture client example)
  • Remote Sensing image server
    • NDVI 30 days data
    • Landsat mosaic data
      • For getting a request from the IT Forum client and sending to the client an image which is processed according to the request
  • Agriculture data client
      • For sending the requests to multiple server and getting the image from multiple servers and combine multiple images

19th APAN Meeting in Bangkok

system configuration
System Configuration

19th APAN Meeting in Bangkok

noaa ndvi 30 days image server example
NOAA NDVI 30 days image server example

http://203.159.10.13/gms/

19th APAN Meeting in Bangkok

landsat image server example
Landsat image server example

http://203.159.10.13/gms/

19th APAN Meeting in Bangkok

comparison of image quality
Comparison of image quality

Landsat 5 Original image

Generated image from Mapserver

19th APAN Meeting in Bangkok

comparison of image quality1
Comparison of image quality

Png 24 bit image generated from mapserver at 400x300 size

Original image from Landsat 5 image actual size is 266x209

19th APAN Meeting in Bangkok

mobile gis application
Mobile GIS Application
  • User need RS images at fields
    • Better understanding of the site
    • Fast and good decision making
  • Limitation of PocketPC
    • Small System Storage (64MB – 1GB)
    • Impossible to store huge satellite image
  • Access to the Image server from fields
    • Wireless internet connection

19th APAN Meeting in Bangkok

system configuration1

RS

Image

Remote Sensing Image Server

System configuration

Spatial DB

(Current position)

4) Request RS image and point layer according to latest position

5) Send image map according to requested

WMS connection

Minesota Mapserver

6) Combine RS image and Point Data -> Image Map

GPS device

PostGIS/

PostgreSQL

Png,jpeg

3) Request image map from mapserver

PHP

Bluetooth Connection

1) Send a position data and request image map

Password authorization

Mobile

Internet

2) Update position

Pocket PC

Bluetooth Connection

7) Send back image map

http

19th APAN Meeting in Bangkok

mobile application

Accessingto the WMS from Field using Mobile Device

Mobile Application

Mobile

Phone

GPS

Bluetooth

PDA

19th APAN Meeting in Bangkok

display image map
Display Image Map

19th APAN Meeting in Bangkok

display time of image map
Display Time of Image Map
  • Image File
    • PNG 24 bit
    • Image size 200 x 300
    • File size is approx 20 KB
  • Display Time of Image Map
    • Thailand’s GPRS speed (40.3 kbps) around 4 second
    • Actual GPRS through put around 12– 13 second
    • EDGE Technology; 200 kbps ( 4 times faster )

19th APAN Meeting in Bangkok

server side image map
Server side image map

19th APAN Meeting in Bangkok

more collaboration more contribution1
More Collaboration, More contribution

19th APAN Meeting in Bangkok

conclusions
Conclusions
  • By implementing two algorithms ( tiling and multi-resolution ), the speed of response time was drastically improved.
  • Multi-server system was tested and shown its efficiency to serve images to users as background images.
  • The potential of OpenGIS and WebGIS like this prototype will promoting more linkage and cooperation.
  • The broker to organize a new growing up of WMS server is required.
  • Extend the utilization of RS image
    • Not limited to Desktop PC

19th APAN Meeting in Bangkok

thank you

Thank you . .

http://mapserver.hondalab.star.ait.ac.th/gms/

http://www.tsunami.ait.ac.th

19th APAN Meeting in Bangkok