Google Earth Engine（GEE） ——2000-2021年地球非洲海岸线数据集

Bishop-Taylor, R., Nanson, R., Sagar, S., Lymburner, L. 2021. Digital Earth Australia
Coastlines. Geoscience Australia, Canberra. https://doi.org/10.26186/116268

var shoreline_annual = ee.FeatureCollection("projects/sat-io/open-datasets/DEAF/COASTLINES/coastlines_v040_shorelines_annual");
var hotspot_zoom_1 = ee.FeatureCollection("projects/sat-io/open-datasets/DEAF/COASTLINES/coastlines_v040_hotspots_zoom_1");
var hotspot_zoom_2 = ee.FeatureCollection("projects/sat-io/open-datasets/DEAF/COASTLINES/coastlines_v040_hotspots_zoom_2");
var hotspot_zoom_3 = ee.FeatureCollection("projects/sat-io/open-datasets/DEAF/COASTLINES/coastlines_v040_hotspots_zoom_3");
var rate_of_change = ee.FeatureCollection("projects/sat-io/open-datasets/DEAF/COASTLINES/coastlines_v040_rates_of_change");
Map.centerObject(shoreline_annual.first(),18)
// Get a color for a year
var yearColor = ee.Dictionary(
  {
    "2000": "#4d4d7a",
    "2001": "#535a88",
    "2002": "#5a608d",
    "2003": "#616692",
    "2004": "#686c97",
    "2005": "#6f719c",
    "2006": "#7677a1",
    "2007": "#7d7ca6",
    "2008": "#8482ab",
    "2009": "#8b87b0",
    "2010": "#bf0898",
    "2011": "#c70292",
    "2012": "#ce027e",
    "2013": "#d5016a",
    "2014": "#dc0156",
    "2015": "#e40042",
    "2016": "#ec003e",
    "2017": "#f3003a",
    "2018": "#fa0036",
    "2019": "#ff0033",
    "2020": "#ff6d33",
    "2021": "#ffe54c"
}
)
function addStyle(ft) {
  var color = yearColor.get(ft.get('year'));
  return ft.set('styleProperty', ee.Dictionary({'color': color}));
}
// Make a FeatureCollection out of years database
var pp = ee.FeatureCollection(shoreline_annual).map(addStyle);
function addLayer(year) {
  Map.addLayer(pp.filter(ee.Filter.eq('year', ee.Number.parse(year))).style({styleProperty: 'styleProperty', neighborhood: 50}), {}, year, true, 0.8);
}
// Apply `addLayer` to each record in years
yearColor.keys().getInfo().map(addLayer);
// Define a dictionary which will be used to make legend and visualize image on map
var dict = {
  "names": [
    "2000",
    "2001",
    "2002",
    "2003",
    "2004",
    "2005",
    "2006",
    "2007",
    "2008",
    "2009",
    "2010",
    "2011",
    "2012",
    "2013",
    "2014",
    "2015",
    "2016",
    "2017",
    "2018",
    "2019",
    "2020",
    "2021"
  ],
    "colors": [
    "#4d4d7a",
    "#535a88",
    "#5a608d",
    "#616692",
    "#686c97",
    "#6f719c",
    "#7677a1",
    "#7d7ca6",
    "#8482ab",
    "#8b87b0",
    "#bf0898",
    "#c70292",
    "#ce027e",
    "#d5016a",
    "#dc0156",
    "#e40042",
    "#ec003e",
    "#f3003a",
    "#fa0036",
    "#ff0033",
    "#ff6d33",
    "#ffe54c"
]
};
var legend = ui.Panel({
  style: {
    position: 'middle-right',
    padding: '8px 15px'
  }
});
// Create and add the legend title.
var legendTitle = ui.Label({
  value: 'Shoreline Year',
  style: {
    fontWeight: 'bold',
    fontSize: '18px',
    margin: '0 0 4px 0',
    padding: '0'
  }
});
legend.add(legendTitle);
var loading = ui.Label('Loading legend...', {margin: '2px 0 4px 0'});
legend.add(loading);
  // Creates and styles 1 row of the legend.
  var makeRow = function(color, name) {
    // Create the label that is actually the colored box.
    var colorBox = ui.Label({
      style: {
        backgroundColor: color,
        // Use padding to give the box height and width.
        padding: '8px',
        margin: '0 0 4px 0'
      }
    });
  // Create the label filled with the description text.
  var description = ui.Label({
    value: name,
    style: {margin: '0 0 4px 6px'}
  });
  return ui.Panel({
    widgets: [colorBox, description],
    layout: ui.Panel.Layout.Flow('horizontal')
  });
};
  var palette = dict['colors'];
  var names = dict['names'];
  loading.style().set('shown', false);
  for (var i = 0; i < names.length; i++) {
    legend.add(makeRow(palette[i], names[i]));
  }
// Print the panel containing the legend
print(legend);