Satellite Image Data Service Providing New Satellite Imagery and Geodata Services

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Satellite Image Data ServiceProviding New
Satellite Imageryand Geodata Services

• Gail Millin Kamie Kitmitto

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Presentation Outline

• Introduction of SIDS
• Variety of Satellite Data Available Key
  achievements
• Who is using SIDS?
• Current Data Acquisition and Enhancements
• Development of complex processing chain
• Value addition
• How does SIDS fit into the broader Spatial Data
  Infrastructure and Information Environment?
• 5 Year Plan for Future Development

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Introduction to SIDS
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Current Service

• SIDS main activities can be summarised as
• National Data Provider for Satellite and related
  data
• A national support service for the geospatial
  community
• Provider of Educational Materials
• Research and Development particularly in new data
  delivery infrastructure solutions
• Maintainer of the Landmap website
• Actively involved in dissemination and outreach
  activities within the spatial science community

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Key Achievements

• Satellite data of high quality excellent
  positional accuracy
• Excellent for research purposes and saves time on
  pre-processing
• Interoperable via OGC WMS Image Streaming
• Enables integration of data with other datasets
  e.g. Ordnance Survey supplied by EDINA
• Development of advanced online image processing
  course for a variety of specialised software's
• Widens the use base of satellite data
• Addresses the growing demand (after the release
  of Google Earth) to use satellite data due to
  higher awareness of this resource in less
  traditional disciplines.
• Spatial coverage of optical data for the whole of
  the UK
• The Only UK national body that acquires data for
  the UK in a systematic and consistent way,
  providing an archive of imagery for the nation.

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Satellite Image Data Service (SIDS)

• Currently available to academics only attending
  institutes that have subscribed and signed a
  licensing agreement.
• 1st August any institute that has signed a
  licensing agreement will have FULL ACCESS to the
  data and services
• 31st July end of subscription fees!!
• Landsat 5 (late 80s early 90s) Landsat 7
  (1999 2000)
• Mediterranean data (Landsat imagery only)
• SPOT (mid 1990s)
• ERS 1 2 (1995 1999)
• Raw Satellite Data Archive of the above
• ENVISAT ASAR AP, IM WS (2005 2006)
• Landmap 25m DEM (derived from ERS) and Projected
  SRTM

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Data 1 - Landsat 4, 5 7
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Data 2 - SPOT
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Data 3 - ERS 1, ERS 2 ENVISAT
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Data 4 - DEM KGPS
25m DEM of UK and Republic of Ireland
KGPS UK Survey
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Learning Materials

• Modules include -
• Information Extraction
• Spectral Mapping
• Geo-referencing
• Structural Mapping
• Vegetation Mapping
• Land Cover Classification
• Meteorology
• Sea-Surface Temperature Mapping
• Coastal Mapping
• Integration with GIS
• Mineral Exploitation

Adapted for - RSI ENVI ERDAS Imagine PCI Idrisi
Kilimanjaro
Visit - landmap.mimas.ac.uk/ipc Requirements
- Athens Username Password Attend a subscribed
institution (until 31st July 2007)
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Who Uses SIDS?
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Landmap Website

• Analysis period 01/12/05 31/12/06
• Highly visited site
• Total Hits 2,935,237
• Total Visitors 163,890
• Total Downloads 165 GB
• Widely visited with 61,115 unique IP addresses
• Highly used on a daily basis average daily
  figures
• Hits 7,412
• Page Views 2,651
• Visitors 413
• Downloads 428 MB
• Valuable information resource
• FAQs, tutorials, courses, papers, image of the
  month.

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JISC Consultation Results

• 62 use SIDS at present
• 55 used SIDS before 2004
• Nearly 50 of respondents had downloaded data
  from SIDS
• 83 respondents use satellite data in their work
• 63 respondents felt online access to UK
  satellite data would save time and money
• Big demand for the service as 90 of respondents
  would use the service if made freely available
  28 rise in current use
• 90 respondents support additional optical
  radar data
• Future use would be split as
• 19 for Research
• 13 for Teaching
• 68 for Research and Teaching

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Current Data Acquisition Enhancements
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RADAR Acquisition

• Facilitate ASAR availability to UK academia
• Advanced SAR imagery valuable due to
• Different polarization combinations
• Range of incidence angles
• Different modes of operation
• SAR imagery can be obtained
• During periods of cloud cover
• At a much higher temporal frequency then optical
  data
• At night due to ENVISAT and ERS being active
  sensors

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Data Aquisition
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ASAR Products Produced Processing

• 32 bit and 8 bit Greyscale imagery
• 8 bit Multi Difference Colour Composite
• 8 bit Unsigned Coherence Colour Composites
• 16 bit to be produced Using PCI Geomatica

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Advanced Synthetic Aperture Radar
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Use Case Materials

• Three MSc Projects with University of Nottingham
• Group 1 Monitoring temporal changes in a forest
  ecosystem to estimate terrestrial carbon fluxes
  using optical/RADAR imagery
• Group 2 Evaluate the capabilities of ASAR wide
  swath mode data versus ASAR image mode data for
  land cover classification, with a focus on the
  Peak District.
• Group 3 Urban Remote Sensing - A Comparison of
  Radar and Optical Imagery

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SIDS Spatial Data Infrastructure
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Viewing and Accessing Data Archive

• 3 Methods of Viewing
• Image Streaming via Landmap Image Streaming
  Viewer OR via free downloadable heavy clients
  such as ESRI ArcGIS Explorer or Cadcorp
• Web Mapping Service (WMS) via OGC Landmap Viewer
  or OGC Compliant softwares
• Screenshots of the Data provided in Point Click
  Download Service
• 2 Methods of Downloading Data
• Landmap Point and Click (via drop down menus)
  service
• Landmap Web Coverage Service (WCS) (still in
  development)

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PHP
MapScript
Request
Response
Request
Response
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1. View Landmap Image Streaming Client
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2. View Heavy Client e.g. ArcGIS Explorer
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3. View Download Landmap OGC Client (WMS/WCS)
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Metadata Provision
At the service level through IESR! Metadata
reviewed and updated July 2006.
At the dataset level through the download of XML
files from the interactive mapping
service. Metadata currently being reviewed and
updated.

• Further funding would enable the implementation
  of GeoNetworks an OGC Catalogue Service which
  allows searches of XML files at the dataset
  level.
• Highly beneficial for users to identify relevant
  dataset.

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Further Data Infrastructure Developments

• GEMS II - In 2007 funds have been allocated to
  further Grid Enable MIMAS Services part II will
  focus on the SIDS archive
• Provide a case study example of urban to rural
  change detection at the national scale
• Utilising the powerful processing ability of grid
  technologies
• GE - Creation of KML files in 2007 to bring the
  SIDS archive into the Google Earth environment
• Advanced and easy to use visualisation
  capabilities
• Allow integration of SIDS KML with users own KML
  files
• The KML file will be registered to Google to
  enhance data discovery via GE
• KML will be available for download from Landmap
  website

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Future Strategy
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Future Developments

• New Data Acquisition (75,000 per annum to be
  spent for next 5 years)
• 50,000 optical data DMC, Landsat, MERIS
• 25,000 radar data ASAR
• Outreach and Training (Up to 1000 to develop 5
  use case scenarios)
• Subcontracting the creation of use cases for -
• Application of radar data
• Application of SIDS WMS and WCS
• Further suggestions are welcome!
• SIDS continue SDI developments and delivery of
  training

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How to Register to use SIDS!

• Institutes must sign a licensing agreement form
  to use the service after July 31st 2007
• Further information will be available at
  http//landmap.mimas.ac.uk
• Users require an Athens Username and Password
• Allows access to download all SIDS datasets
• Access to the online learning materials e.g.
  Image Processing Course

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Thanks for Listening ?
Enquiries spatial_at_mimas.ac.uk Website
http//landmap.mimas.ac.uk