Description

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The Deforestation Alert System (Sistema de Alerta de Desmatamento—SAD) is a monthly alert that monitors forest cover loss and forest degradation in the Brazilian Amazon. The system generates information that is published monthly by Imazon, a Brazilian NGO, through its Forest Transparency Bulletin. The monthly alerts are derived from a temporal mosaic of MODIS daily images that are scaled down from 500 × 500 meter to 250 × 250 meter resolution. The monthly results are then validated using medium resolution images from the China-Brazil Earth Resources Satellite (CBERS) and NASA Landsat data in order to “ground-truth” the results being reported.

Dataset Attributes

  • objectid
    Number
  • shape
    Number
  • date
    Date
    1209513600000 to 1480464000000
  • data type
    Text
    {"value"=>"defor", "count"=>32985} (), {"value"=>"degrad", "count"=>13384} ()
  • original oid
    Text
    {"value"=>"0", "count"=>70} (), {"value"=>"1", "count"=>70} (), {"value"=>"3", "count"=>69} (), {"value"=>"2", "count"=>69} (), {"value"=>"4", "count"=>68} (), {"value"=>"5", "count"=>67} (), {"value"=>"6", "count"=>66} (), {"value"=>"7", "count"=>65} (), {"value"=>"10", "count"=>63} (), {"value"=>"14", "count"=>63} ()
  • original file name
    Text
    {"value"=>"imazongeo_sad_deforestation_2008-04_2013-12.shp", "count"=>18433} (), {"value"=>"imazongeo_sad_degradation_2008-10_2013-12.shp", "count"=>9623} (), {"value"=>"imazon_sad_desmatamento_2016_06_amazonia.shp", "count"=>1284} (), {"value"=>"imazon_sad_desmatamento_2015-07_amazonia.shp", "count"=>1024} (), {"value"=>"imazon_sad_desmatamento_2015-08_amazonia.shp", "count"=>945} (), {"value"=>"imazon_sad_desmatamento_2014-06_amazonia.shp", "count"=>942} (), {"value"=>"imazon_sad_desmatamento_2014-08_amazonia.shp", "count"=>807} (), {"value"=>"imazon_sad_desmatamento_2016_08_amazonia.shp", "count"=>796} (), {"value"=>"imazon_sad_desmatamento_2016_07_amazonia.shp", "count"=>790} (), {"value"=>"imazon_sad_desmatamento_2014-09_amazonia.shp", "count"=>772} ()
  • gfwid
    Text
    {"value"=>"6E8D64ED-8A2C-4EF4-8DAB-0568784A5C27", "count"=>1} (), {"value"=>"E4B79F85-DF29-4319-B4E3-B3DA807A9DFA", "count"=>1} (), {"value"=>"474F4235-BBB8-4A3D-8951-CA65C67E0ECD", "count"=>1} (), {"value"=>"0126B9EA-11BF-4793-ADAE-08B7C4AF1120", "count"=>1} (), {"value"=>"A3BF89A6-5D8F-4687-9CF5-3CE25836504F", "count"=>1} (), {"value"=>"f030a6db0389bbd3c316c77f020a7d72", "count"=>1} (), {"value"=>"8AE59483-1E62-4A27-A9DE-C8E2E48CBDBB", "count"=>1} (), {"value"=>"0aaeb6ab53ea385eae0a9e7a58fd0137", "count"=>1} (), {"value"=>"c4691f5f7a04b8ac54d28c095627ce4b", "count"=>1} (), {"value"=>"5BA34FEE-3D0A-4872-B875-0910290BFADE", "count"=>1} ()
  • GlobalID
    Number
  • ha_eck_iv
    Number
    0.00058202 to 172365.843575
  • st_length(shape)
    Number
  • ha_eck_iv
    Number
    0.00058202 to 172365.843575
  • date_alias
    Date
    1209513600000 to 1480464000000

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