get min max of an image

GIS, Google Earth Engine, Javascript 2 comments

Get stats of an area

Step 1: Display the srtm using the code below.

// import srtm dem
var srtm = ee.Image("USGS/SRTMGL1_003");

// mask areas less than 0
srtm = srtm.mask(srtm.gt(0));

// add layer to map
Map.addLayer(srtm,{min:??,max:??,palette:"??????"});

Step 2: Find the min max using the inspector.
srilanka16.jpg

Step 3: draw a geometry

srilanka17.jpg

Step 4: calculate the min max using the code below

var minMax = srtm.reduceRegion(ee.Reducer.minMax(),geometry);
print(minMax);

 

2 comments

  1. I have cooldn’t worked the code. Map.addLayer(srtm,{min:??,max:??,palette:”??????”}); there is a mistake about ? it say, thanks

    Reply

    1. var geometry = ee.Geometry.Polygon(
      [[[44.06596982940921, 39.86569840255777],
      [44.06596982940921, 39.51909356184006],
      [44.57134092315921, 39.51909356184006],
      [44.57134092315921, 39.86569840255777]]]);

      // import srtm dem
      var srtm = ee.Image(“USGS/SRTMGL1_003”);

      // mask areas less than 0
      srtm = srtm.mask(srtm.gt(0));

      // add layer to map
      Map.addLayer(srtm,{min:0,max:8000});

      var minMax = srtm.reduceRegion(ee.Reducer.minMax(),geometry);
      print(minMax);

      Reply

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