Map NDVI from MODIS image for a specific country

Question

var dataset = ee.FeatureCollection('USDOS/LSIB/2013')
            .filterBounds(ee.Geometry.Point(-7.681, 53.43));
var image = ee.Image().float().paint(dataset, 'iso_num');

var visParams = {
 palette: ['f5ff64', 'b5ffb4', 'beeaff', 'ffc0e8', '8e8dff', 'adadad'],
 min: 0.0,
 max: 894.0,
 opacity: 0.8,
 };
 Map.addLayer(image, visParams, 'USDOS/LSIB/2013');

 // The input image has a SR-ORG:6974 (sinusoidal) projection.
 var image1 = ee.ImageCollection('MODIS/MOD13A1')
           .filter(ee.Filter.date('2016-01-01', '2016-01-31'))
           .filterBounds(dataset)
           .mean();

var ndvi = image1.select('NDVI');
var ndviVis = {
 palette: [
'FFFFFF', 'CE7E45', 'DF923D', 'F1B555', 'FCD163', '99B718', '74A901',
'66A000', '529400', '3E8601', '207401', '056201', '004C00', '023B01',
'012E01', '011D01', '011301'
 ],
 };
 Map.addLayer(ndvi, ndviVis, 'NDVI');

This is my code, it works, however, the map shows the NDVI for the entire world. Is it because of the different coordination system? I tried to convert it to the same, but the Google Earth Engine API only had the projection transformation of a single image, and do not have the code for transformation of the image collection. How can I do it?

This is the link of my code https://code.earthengine.google.com/c1132b4753acf26b4ce5f93cca6ff070

Answer 1

You can clip your image to the geometry you're interested in:

var ndvi = image1.select('NDVI').clip(dataset.geometry());

https://code.earthengine.google.com/0f3776e9e41fd209f55eda4f3a8e84ad