Google Earth engine (GEE) -- 1975 dataset of Landsat global land survey

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1975 Global land survey (GLS) Is from Landsat Multispectral scanner (MSS) Global image collection . Most scenes are composed of Landsat 1-3 stay 1972-1983 Obtained in .Landsat 1-3 Some blanks in the data have been Landsat 4-5 stay 1982-1987 Filled by the scenes acquired during the years . The data contains 4 A spectral band ： green 、 Red 、NIR Band and SWIR Band . In a typical false color display , The image is displayed in red , Because it is displayed in red NIR The band highlights the vegetation .

Dataset availability

1972-07-25T00:00:00Z–1983-02-20T00:00:00（ We can choose 1972-1983 All the effects of the year , You can also use this data NDVI Calculation , Other indexes cannot be calculated for the time being , Because there are few bands , Only 4 Band ）

Data set provider

U.S. Geological Survey

Earth engine fragment

ee.ImageCollection("LANDSAT/GLS1975")

The resolution of the
60 rice

Band ： It is worth noting that there are only 4 Band , It's red 、 Happy color 、 Near infrared and short wave infrared bands ,

full name	wavelength	describe
10	500-600 nanometer	Green
20	600-700 nanometer	Red
30	700-800 nanometer	The near infrared
40	800-1100 nanometer	Shortwave infrared

Code ：

var dataset = ee.ImageCollection('LANDSAT/GLS1975');
var falseColor = dataset.select(['30', '20', '10']);
var falseColorVis = {
  gamma: 1.6,
};
Map.setCenter(44.517, 25.998, 5);
Map.addLayer(falseColor, falseColorVis, 'False Color');

Terms of use

Landsat Datasets are data created by the federal government , Therefore, it is in the public domain , Can be used without copyright restrictions 、 Transfer or reproduction .

Confirmation or credit from the U.S. Geological Survey as a data source should be provided by including a line of text references , As shown below .

（ product 、 Images 、 Photo or dataset name ） Provided by the United States Geological Survey

Example ：Landsat-7 The picture is provided by the U.S. Geological Survey

About correct quotation and confirmation USGS More details about products , see also  USGS Visual recognition system guide  .

a citation ：

• GLS 1975 The picture is provided by the U.S. Geological Survey

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