I calculate the number of fires for a region and export the result to Google Drive as a CSV file, but I can't add the date to the image collection to export, it gives the following error:
ImageCollection (Error) Error in map(ID=2019001): Image.addBands, argument 'srcImg': Invalid type. Expected: Image. Actual: Date.
Here is the code:
// Load country shapefile
var lsib = ee.FeatureCollection("USDOS/LSIB_SIMPLE/2017");
var vn_shape = lsib.filterMetadata('country_na', 'equals', 'Argentina');
print (vn_shape);
// Load fire counts image
var fire = ee.ImageCollection('FIRMS')
.filterBounds(vn_shape)
.filterDate('2019', '2020')
print(fire)
var scale = fire.first().projection().nominalScale();
// Filter fire with more than 50% confidence and add a new band representing areas where confidence of fire > 50%
var filterConfidence = function(image) {
var line_number = image.select('line_number');
var confidence = image.select('confidence');
var conf_50 = confidence.gt(50).rename('confidence_50');
var count_band = line_number.updateMask(conf_50).rename('count');
// HERE IS THE PROBLEM!
var date = image.date();
return image.addBands(count_band)
.addBands(date);
};
var fire_conf = fire.map(filterConfidence);
print('fire_conf', fire_conf);
// Count for individual image.
var countIndividualImg = function(image) {
var countObject = image.reduceRegion({
reducer: ee.Reducer.countDistinct(),
scale: scale,
geometry: vn_shape,
maxPixels: 1e9
});
return image.set(countObject);
};
var fire_ind_count = fire_conf.map(countIndividualImg);
print('fire_ind_count', fire_ind_count);
Export.table.toDrive({
collection: fire_ind_count,
description: 'FireCounts_gt50_conf',
selectors:['count','date'],
fileFormat: 'CSV'
});
print('Total fire count', fire_ind_count.aggregate_sum('count'));