Google Earth Engine（GEE）—— 加拿大陆地卫星得出的1985-2020年森林采伐扰动情况

Hermosilla, T., Wulder, M.A., White, J.C., Coops, N.C., Hobart, G.W., Campbell, L.B., 2016. Mass data processing of time series Landsat imagery:
pixels to data products for forest monitoring. International Journal of Digital Earth 9(11), 1035-1054.

var ca_forest_harvest = ee.Image("projects/sat-io/open-datasets/CA_FOREST/CA_Forest_Harvest_1985-2020");


var style = require('users/gena/packages:style')
Map.setCenter(-96.038,54.742,4)

var vis = {min:1985,max:2020,palette:["03071e","370617","6a040f","9d0208","d00000","dc2f02","e85d04","f48c06","faa307","ffba08"]}

style.SetMapStyleGrey()

Map.addLayer(ca_forest_harvest,vis,'Canada Forest Harvest 1985-2020')

var nSteps = 15

// Creates a color bar thumbnail image for use in legend from the given color palette
function makeColorBarParams(palette) {
  return {
    bbox: [0, 0, nSteps, 1],
    dimensions: '200x10',
    format: 'png',
    min: 0,
    max: nSteps,
    palette: palette,
  };
}

// Create the colour bar for the legend
var colorBar = ui.Thumbnail({
  image: ee.Image.pixelLonLat().select(0).int(),
  params: makeColorBarParams(vis.palette),
  style: {stretch: 'horizontal', margin: '0px 8px', maxHeight: '24px',position:'bottom-left'},
});

// Create a panel with three numbers for the legend
var legendLabels = ui.Panel({
  widgets: [
    ui.Label(vis.min, {margin: '4px 8px'}),
    ui.Label(vis.max, {margin: '4px 8px', textAlign:'right',stretch:'horizontal'})
  ],
  layout: ui.Panel.Layout.flow('horizontal')
});
// Legend title
var legendTitle = ui.Label({
  value: 'Year',
  style: {fontWeight: 'bold',position:'bottom-left'}
});

// Add the legendPanel to the map
var legendPanel = ui.Panel([legendTitle, colorBar, legendLabels]);
legendPanel.style().set({
  position: 'bottom-left',
  shown: true
});
Map.add(legendPanel);