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 1490918400000
  • data type
    Text
    {"value"=>"defor", "count"=>33099} (), {"value"=>"degrad", "count"=>13401} ()
  • original oid
    Text
    {"value"=>"0", "count"=>78} (), {"value"=>"1", "count"=>77} (), {"value"=>"3", "count"=>74} (), {"value"=>"2", "count"=>74} (), {"value"=>"4", "count"=>73} (), {"value"=>"5", "count"=>72} (), {"value"=>"6", "count"=>71} (), {"value"=>"7", "count"=>70} (), {"value"=>"10", "count"=>68} (), {"value"=>"9", "count"=>68} ()
  • 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"=>"7CC998C3-6447-40B3-9F72-E54FAD4ADF87", "count"=>1} (), {"value"=>"BDFE0E39-D172-4C5E-BD9A-76BD3F0F6132", "count"=>1} (), {"value"=>"CB6EA120-F9EA-4B48-B54D-5E5F8463A312", "count"=>1} (), {"value"=>"C9F7611E-ADF7-4411-8CF3-1CEC13AB5B33", "count"=>1} (), {"value"=>"A91255B5-8DE0-4F39-8E87-324AD96FF05D", "count"=>1} (), {"value"=>"d0117c934941026b0dc78abfd0819c0e", "count"=>1} (), {"value"=>"C80B5611-0EF2-4AC5-AE77-1B282B4C7A66", "count"=>1} (), {"value"=>"6036CA5B-E109-41B3-9C55-CAA8CED82DE3", "count"=>1} (), {"value"=>"41FECA7A-7FFE-4BA5-B617-EDB1484A704A", "count"=>1} (), {"value"=>"77FC97A9-168E-47CC-8F8F-B0DAF2C009F1", "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 1490918400000

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