Landsat Image Mosaic of Antarctica (LIMA) - Processed Landsat Scenes (16 bit) Metadata

Dataset Availability

1999-06-30T00:00:00Z–2002-09-04T00:00:00Z

Dataset Provider

USGS

Earth Engine Snippet

ee.FeatureCollection("USGS/LIMA/SR_METADATA")

Tags

antarctica ice landsat-derived lima mosaic sr table usgs

Description

The Landsat Image Mosaic of Antarctica (LIMA) is a seamless and virtually cloudless mosaic created from processed Landsat 7 ETM+ scenes.

Processed Landsat Scenes (16 bit) are Level 1Gt NLAPS scenes converted to 16 bit, processed with sun-angle correction, and converted to reflectance values (Bindschadler 2008).

Each Landsat scene is processed with elevation data and sun-angle correction to ensure surface features were accurately represented. The sun's angle in Antarctica gives the appearance of a setting sun. Because of the low sun angle, as Landsat passes over Antarctica, the outer edges of the continent appear brighter than areas closer to the South Pole, so scenes have bright and dark areas. Inconsistent sun angles and shadows where corrected for these scenes. Without this process, mosaicking would produce a patchwork of scenes since each scene would have a brighter and a darker side.

This is a table which contains metadata for the Image Collection USGS/LIMA/SR

Table Schema

Table Schema

Name	Type	Description
ACQ_DATE	STRING	Acquisition date in YYYY-MM-DD format
PATH	INT	WRS path
POLY_ID	INT	Unique ID assigned to a polygon
ROW	INT	WRS row
SCENE_ID	STRING	Scene ID
SENSOR	STRING	Sensor
SPACE	STRING	Name of the satellite used to gather data

Terms of Use

Terms of Use

These images are in the public domain and can be used freely and without acknowledgement. However, credit to the Landsat Image Mosaic of Antarctica (LIMA) Project is greatly appreciated.

Citations

Citations:

• Bindschadler, R., Vornberger, P., Fleming, A., Fox, A., Mullins, J., Binnie, D., Paulson, S., Granneman, B., and Gorodetzky, D., 2008, The Landsat Image Mosaic of Antarctica, Remote Sensing of Environment, 112, pp. 4214-4226. PDF

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Code Editor (JavaScript)

var dataset = ee.FeatureCollection('USGS/LIMA/SR_METADATA');

// Calculate the age of each feature by subtracting
// the acquisition date from "today".
var feature_ages = dataset.map(
  function(feature) {
    var today = ee.Date.fromYMD(2024, 1, 12);
    var acq_date = ee.Date.parse(
      'yyyy-MM-dd', feature.get('ACQ_DATE'));
    var diff = today.difference(acq_date, 'day');
    return feature.set({'ACQ_AGE': diff});
  }
);

// Reduce by calculating the smallest ACQ_AGE,
// which gives the most recent acquisition date for
// that area.
var reduced_ages = feature_ages.reduceToImage({
  properties: ['ACQ_AGE'],
  reducer: ee.Reducer.min()
});

var reduced_ages_vis = {
  min: 6000,
  max: 9000,
  palette: ['00ff00', 'ff0000'],
};

var lon = -43.6;
var lat = -74.2;
var gray = 150;
var background = ee.Image.rgb(gray, gray, gray).visualize({min: 0, max: 255});

Map.setCenter(lon, lat, 2);
Map.addLayer(
  reduced_ages,
  reduced_ages_vis,
  'Acquisition Age');

Open in Code Editor

Landsat Image Mosaic of Antarctica (LIMA) - Processed Landsat Scenes (16 bit) Metadata

The Landsat Image Mosaic of Antarctica (LIMA) is a seamless and virtually cloudless mosaic created from processed Landsat 7 ETM+ scenes. Processed Landsat Scenes (16 bit) are Level 1Gt NLAPS scenes converted to 16 bit, processed with sun-angle correction, and converted to reflectance values (Bindschadler 2008). Each Landsat scene is …

USGS/LIMA/SR_METADATA, antarctica,ice,landsat-derived,lima,mosaic,sr,table,usgs

1999-06-30T00:00:00Z/2002-09-04T00:00:00Z

-90.0 -180.0 -55.0 180.0

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https://developers.google.com/earth-engine/datasets