The Global Land Survey (GLS) 1975 is a global collection of imagery from the Landsat Multispectral Scanner (MSS). Most scenes were acquired by Landsat 1-3 in 1972-1983. A few gaps in the Landsat 1-3 data have been filled with scenes acquired by Landsat 4-5 during the years 1982-1987. These data contain 4 spectral bands: Green, Red, an NIR band, and a SWIR band. In the typical False-color presentation, the images appear red because the NIR band, displayed as red, highlights vegetation.
1975年全球土地調查(GLS)是一個來自于Landsat多光譜掃描器(MSS)的全球圖像集。大多數場景是由Landsat 1-3在1972-1983年獲得的。大地衛星1-3号資料中的一些空白被大地衛星4-5号在1982-1987年獲得的場景所填補。這些資料包含4個光譜帶。綠色、紅色、一個近紅外波段和一個西南紅外波段。在典型的假彩色示範中，圖像顯示為紅色，因為顯示為紅色的近紅外波段突出了植被。
Dataset Availability
1972-01-01T00:00:00Z - 1983-02-10T00:00:00
Dataset Provider
USGS
Collection Snippet
Copied
ee.ImageCollection("LANDSAT/GLS1975")
Resolution
60 meters
Bands Table
| Name | Description | Wavelength |
|---|---|---|
| 10 | Green | 500-600 nm |
| 20 | Red | 600-700 nm |
| 30 | Near infrared | 700-800 nm |
| 40 | Short-wavelength infrared | 800-1100 nm |
說明：There are no restrictions on Landsat data, and it can be used or redistributed as desired. However, a statement of the data source when citing, copying, or reprinting USGS Landsat data or images is recommended.
引用：
"GLS 1975 image courtesy of the U.S. Geological Survey"
代碼：
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');
L5：
var dataset = ee.ImageCollection('LANDSAT/GLS1975_MOSAIC');
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');
L7：
var dataset = ee.ImageCollection('LANDSAT/GLS2005_L7');
var trueColor321 = dataset.select(['30', '20', '10']);
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(trueColor321, {}, 'True Color (321)');