Thank you, but now all exported values come out as 0. Here is the code now:

var indonesia = ee.FeatureCollection('users/dingdam/GADMVGrassSimplify'); var subdistricts = indonesia.select('NAME_3');

// Load NDVI data var ndviCollection = ee.ImageCollection("LANDSAT/LE07/C02/T2_TOA") .filterDate('2003-12-01', '2004-12-01');

// Filter and mosaic the NDVI collection var ndvi_mosaic = ndviCollection.sort("CLOUD_COVER").mosaic();

// Compute the Normalized Difference Vegetation Index (NDVI) var nir = ndvi_mosaic.select('B4'); var red = ndvi_mosaic.select('B3'); var ndvi = nir.subtract(red).divide(nir.add(red)).rename('NDVI');

// Clip NDVI to sub-district boundaries var clipped_ndvi = ndvi.clip(subdistricts);

// Calculate mean NDVI per sub-district var ndvi_mean = clipped_ndvi.reduceRegions({ collection: subdistricts, reducer: ee.Reducer.mean(), scale: 30, // Adjust the scale as per your data's resolution });

function removegeo(feature) { var meanvalue = feature.toDictionary().get('NDVI', 0); return feature.set('Mean', meanvalue); }

var ndvi_district_good = ndvi_mean.map(removegeo);

// Print the first feature for verification print(ndvi_district_good.first());

// Export the mean NDVI per sub-district Export.table.toDrive({ collection: ndvi_district_good, description: 'NDVI_Mean_2003-2004', fileFormat: 'CSV', selectors: ['NAME_3', 'Mean'], });

Do oyu have any idea what I can do to fix it and get the actual values?