NERC Data Catalogue Service
ENVISAT Advanced Synthetic Aperture Radar (ASAR) UK imagery
Data from the Advanced Synthetic Aperture Radar (ASAR) on-board ENVISAT are available for the UK from 2002-2009. The raw data for the alternating polarisation, wide swath and image modes were acquired by the Landmap project from ESA and processed to produce 8 and 32-bit greyscale and multi-difference colour composite geotiff images. The Joint Information Systems Committee (JISC) funded Landmap service which ran from 2001 to July 2014 collected and hosted a large amount of earth observation data for the majority of the UK. After removal of JISC funding in 2013, the Landmap service is no longer operational, with the data now held at the NEODC.
When using these data please also add the following copyright statement: © ESA 2004/2005/2006/2007/2008…. Received and Distributed by University of Manchester under licence from the European Space Agency
Simple
- Date (Publication)
- 2014-08-18T08:16:07
- Date (Creation)
- 2014-08-18T08:16:07
- Identifier
- NERC Earth Observation Data Centre (NEODC) / 86a063c7f894cd9eceb6e542888a13ea
- Maintenance and update frequency
- notPlanned Not planned
- Update scope
- dataset Dataset
- Keywords
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- Not defined
- GEMET - INSPIRE themes, version 1.0
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- orthoimagery
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- Restricted data: please submit an application using the REQUEST ACCESS link for access.
- Use constraints
- otherRestrictions Other restrictions
- Spatial representation type
- grid Grid
- Metadata language
- EnglishEnglish
- Topic category
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- Imagery base maps earth cover
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- Begin date
- 2002-01-01T00:00:00
- End date
- 2009-12-31T00:00:00
- Unique resource identifier
- WGS 84
- Distribution format
-
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Data availability and file format
The data are available in geotiff format which can be opened in many earth observation image processing software including open/free software such as Erdas ER viewer and the freely available Basic ERS & Envisat (A)ATSR and Meris Toolbox (BEAM) or NEST (Next ESA SAR Toolbox). Geotiff files are TIFF files which have geographic metadata embedded as tags within the TIFF file. The geographic metadata can then be used to position the image in the correct location and geometry on the screen of a geographic information display. The data are split into the three modes acquired by Landmap (alternating polarisation, wide swath and image modes). The various polarisations can be determined from the filename:
hh - Horizontal polarisation transmitted, horizontal received.
vv - Vertical transmitted, vertical received
hv - Horizontal transmitted, vertical received
vh - Vertical transmitted, horizontal received
Specific products include 32 bit _geo GeoTiff, and 8 bit _geo_lia and _geo_ls_mask GeoTiffs. All the geotiff images are provided with GeoTiff World Files (.tfw) which are used to geo-reference images to an appropriate projection scheme.
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- OnLine resource
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CEDA Data Catalogue Page
Detail and access information for the resource
- OnLine resource
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DOWNLOAD
Download Data
- OnLine resource
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ASAR specifications and details
No further details.
- OnLine resource
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The ESA ASAR website
No further details.
- OnLine resource
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Landmap terms of use
No further details.
- OnLine resource
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ASAR product handbook
No further details.
- Hierarchy level
- dataset Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
- Data collected and prepared by the Landmap team before a copy of the data were obtained by NEODC directly from Landmap.
- File identifier
- 86a063c7f894cd9eceb6e542888a13ea XML
- Metadata language
- EnglishEnglish
- Character set
- 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF8
- Parent identifier
- Landmap: Radar Earth Observation Collection 47edf6f8790da0ebb5080feb810a630e
- Hierarchy level
- dataset Dataset
- Date stamp
- 2025-11-15T03:02:57
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Overviews
Spatial extent
Provided by
