envisat aatsr 2 weeks june 2003 web mapping access to the muis browse products lars edgardh...
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Envisat AATSR 2 weeks June 2003
Web Mapping Access to theMUIS Browse Products
Lars Edgardh SpacemetricTorbjörn Westin Spacemetric
www.spacemetric.com
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MUIS2WMS project
MUIS-C
InterfaceServlets
WMS ImageServer
• ESRIN specification
• Spacemetric contractor
• SaabTech subcontractor
• Delivered March 2004 on time and on budget
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Spacemetric• Systems for geographical information in
operational context
• Consulting in satellite photogrammetry and image production
• Proven project methods. Long experience of running complex projects
• Web-based technologies such as Java, XML, HTML and JSP
Located in Stockholm Sweden
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Requirements
• Statement of work very clear
• Should provide high accuracy in the rectified and mosaiced images
• Very short response times
• Support of all MUIS-C (MUIS-B) satellites and sensors (14 sensors), both optical and radar
• Based on open source
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Our approach• Reuse modules and experience of designing
systems for orthorectification
• Use same type of analytical model as full images
• Accuracy and stability by using analytical models
• Try new technology for fast massive parallel image processing – Application servers
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WMS Image ServerThe WMS Image Server makes rectification and mosaicing of browses on the fly. The server is a middleware between client and MUIS-C catalogue.
WMS Image Server makes full ortho rectification of browses with sub-pixel accuracy.
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Integration of image data
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WMS query examplehttp://mapmuis.esrin.esa.int:8080/wmsserver/wms?VERSION=1.1.1&REQUEST=GetMap&SRS=EPSG%3A4326&BBOX=7.633748612764467,48.01466301256679,8.212532999103882,57.91858901998451&WIDTH=560&HEIGHT=350&LAYERS=ENV_ASAR_WS_SL,ENV_AATSR_SL&STYLES=,&FORMAT=image%2Fpng&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE
http://mapmuis.esrin.esa.int:8080/wmsserver/wms?VERSION=1.1.1
&REQUEST=GetMap
&SRS=EPSG:4326
&BBOX=7.633748612764467,48.01466301256679,...
&WIDTH=560
&HEIGHT=350
&LAYERS=ENV_ASAR_WS_SL,ENV_AATSR_SL
&STYLES=,
&FORMAT=image%2Fpng
&BGCOLOR=0xFFFFFF
&TRANSPARENT=TRUE
ERS SARERS ATSR-1ERS ATSR-2JERS OPSLandsat TMLandsat MSSNOAA AVHRR
IRS-P3 MOSCHRIS PROBASeaStar SEAWIFSTERRA MODISENVISAT ASARENVISAT AATSRENVISAT MERIS
Missions and sensors
Requirements on geometric accuracy
Max 1 pixel error
Rigoruos photogrammetric model
Generic sensor models
● Sweep scanner● Conical scanner● Pushbroom scanner● SAR
Preprocessing levels
● Raw swath images● Ground-range preprocessed images
Analytical model Polynomial model
Raw browse
● EPSG:4326 Plate Carrée● AUTO:42001 Auto UTM● AUTO:42002 Auto Transverse Mercator● AUTO:42003 Auto Orthographic● AUTO:42004 Auto Equirectangular● EPSG:* Full EPSG compatibility -> more than 2500
predefined coordinate reference systems
Map projections
Plate Carrée
UTM
Orthographic
Orthorectification using a global DEM
The GLOBE DEM has 1 km resolution
Ellipsoid projected Orthorectified
Original radiometry Automatic linear rescaling
Image enhancement
Removal of decorative frames
Configurable for different missions and time periods
Thresholding black areas
Removes columns and rows based on theshold of column and row average intensities
MRPPLL
JPEG
PNG supports transparency
GeoTIFF stores all map information in tags forautomatic georeferencing in GIS systems
Image file formats