sdcg-7 session-9 thursday, march 5, 2015 country reports and ceos analysis tools sdcg-7 sydney,...
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SDCG-7 Session-9Thursday, March 5, 2015
Country Reports and CEOS Analysis Tools
SDCG-7Sydney, Australia
March 4th – 6th 2015
Country Report Summary
• Each country in attendance (Kenya, Cambodia and Colombia) will receive a detailed “Country Package”.
• “Country Packages” contain a summary of Landsat acquisitions over the country since 2000. The Kenya report also includes an updated summary of SPOT acquisitions.
• The reports include details about cloud cover and data processing levels to allow countries to assess the acceptability of available scenes for forest mapping and reporting.
• Analyses were completed using the “COVE Coverage Analyzer” tool and a custom queries of the Landsat archive system for data processing status.
SDCG-7Sydney, Australia
March 4th – 6th 2015
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Example Tables
SDCG-7Sydney, Australia
March 4th – 6th 2015
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TOP TableSummary of L5, L7 and L8 acquisitions per year (2000 through 2014).
Bottom TableDetailed Path-Row summary of low-cloud (<10%) scenes and medium-cloud (<60%) scenes in 2014 for Landsat-7 and Landsat-8.
Landsat Data Processing Example
SDCG-7Sydney, Australia
March 4th – 6th 2015
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Colombia Example• Landsat reports 3 processing levels
(see below). • Queries of the archive can change, as
USGS constantly adjusts the data cache. It is best to query the archive for all processing levels.
• Once you know the data that is available, then submit a batch processing request to get PR data processed to L1T or even better ... to submit a batch processing request for Surface Reflectance Products (next step after L1T).
Landsat Processing LevelsPR = Processing Required (unprocessed data)Level-1T = Radiometric and geometric calibration + DEM and Control Point terrain corrections (BEST) Level-1G = Radiometric and geometric calibration onlyLevel-1Gt = Radiometric and geometric calibration + DEM terrain corrections
Coverage Analyzer Example
SDCG-7Sydney, Australia
March 4th – 6th 2015
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Colombia Example• The COVE Coverage Analyzer can
easily produce the figure on the left.• These figures are valuable for
identifying path-row regions with cloud issues.
• For example, there are several regions along the eastern half of Colombia that did not acquire any images with <20% cloud cover in 2013 and 2014.
2014 Summary of Total Landsat-7 and Landsat-8 scenes with <20% cloud cover. The maximum for any path-row region is 23*2 = 46 scenes.