Il Global Land Survey (GLS) 1975 è una
raccolta globale di immagini dello scanner
multispettrale (MSS) di Landsat. La maggior parte delle scene è stata acquisita dai satelliti Landsat 1-3
nel periodo 1972-1983. Alcune lacune nei dati di Landsat 1-3
sono state colmate con scene acquisite da Landsat 4-5 negli
anni 1982-1987. Questi dati contengono quattro bande spettrali:
verde, rossa, una banda NIR e una banda SWIR. Nella tipica
presentazione a falsi colori, le immagini appaiono rosse perché
la banda NIR, visualizzata in rosso, mette in evidenza la vegetazione.
Bande
Dimensioni pixel 60 metri
Bande
Nome
Dimensioni dei pixel
Lunghezza d'onda
Descrizione
10
metri
500-600 nm
Verde
20
metri
600-700 nm
Rosso
30
metri
700-800 nm
Infrarosso vicino
40
metri
800-1100 nm
Infrarosso a lunghezza d'onda corta
Termini e condizioni d'uso
Termini e condizioni d'uso
I set di dati Landsat sono dati creati a livello federale
e pertanto sono di dominio pubblico e possono essere utilizzati, trasferiti o riprodotti senza limitazioni di copyright.
Il riconoscimento o l'attribuzione dell'USGS come origine dati deve essere fornito
includendo una riga di citazione di testo come nell'esempio mostrato di seguito.
(Nome del prodotto, dell'immagine, della fotografia o del set di dati) per gentile concessione
dell'US Geological Survey
Esempio: immagine Landsat-7 per gentile concessione dell'US Geological Survey
Il Global Land Survey (GLS) 1975 è una raccolta globale di immagini dello scanner multispettrale (MSS) di Landsat. La maggior parte delle scene è stata acquisita dai satelliti Landsat 1-3 nel periodo 1972-1983. Alcune lacune nei dati di Landsat 1-3 sono state colmate con scene acquisite da Landsat 4-5 negli anni 1982-1987. Questi dati…
[null,null,[],[[["\u003cp\u003eThe Global Land Survey (GLS) 1975 dataset provides global imagery from the Landsat Multispectral Scanner (MSS) primarily acquired by Landsat 1-3 between 1972 and 1983.\u003c/p\u003e\n"],["\u003cp\u003eIt includes four spectral bands (Green, Red, Near Infrared, and Short-wavelength Infrared) with a resolution of 60 meters.\u003c/p\u003e\n"],["\u003cp\u003eLandsat datasets are public domain and can be used freely with proper citation to the U.S. Geological Survey.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is available in Earth Engine and can be visualized using false color composites highlighting vegetation.\u003c/p\u003e\n"],["\u003cp\u003eGaps in Landsat 1-3 data within the GLS 1975 collection were filled using Landsat 4-5 imagery from 1982-1987.\u003c/p\u003e\n"]]],[],null,["# Landsat Global Land Survey 1975\n\nDataset Availability\n: 1972-07-25T00:00:00Z--1983-02-20T00:00:00Z\n\nDataset Provider\n:\n\n\n [USGS](https://www.usgs.gov/core-science-systems/nli/landsat/global-land-survey-gls)\n\nTags\n:\n[global](/earth-engine/datasets/tags/global) [gls](/earth-engine/datasets/tags/gls) [landsat](/earth-engine/datasets/tags/landsat) [radiance](/earth-engine/datasets/tags/radiance) [satellite-imagery](/earth-engine/datasets/tags/satellite-imagery) [usgs](/earth-engine/datasets/tags/usgs) \n\n#### Description\n\nThe Global Land Survey (GLS) 1975 is a\nglobal collection of imagery from the Landsat Multispectral\nScanner (MSS). Most scenes were acquired by Landsat 1-3\nin 1972-1983. A few gaps in the Landsat 1-3 data\nhave been filled with scenes acquired by Landsat 4-5 during the\nyears 1982-1987. These data contain 4 spectral bands:\nGreen, Red, an NIR band, and a SWIR band. In the typical\nFalse-color presentation, the images appear red because\nthe NIR band, displayed as red, highlights vegetation.\n\n### Bands\n\n\n**Pixel Size**\n\n60 meters\n\n**Bands**\n\n| Name | Pixel Size | Wavelength | Description |\n|------|------------|-------------|---------------------------|\n| `10` | meters | 500-600 nm | Green |\n| `20` | meters | 600-700 nm | Red |\n| `30` | meters | 700-800 nm | Near infrared |\n| `40` | meters | 800-1100 nm | Short-wavelength infrared |\n\n### Terms of Use\n\n**Terms of Use**\n\nLandsat datasets are federally created data\nand therefore reside in the public domain and may be used, transferred, or reproduced without copyright restriction.\n\nAcknowledgement or credit of the USGS as data source should be provided\nby including a line of text citation such as the example shown below.\n\n(Product, Image, Photograph, or Dataset Name) courtesy of\nthe U.S. Geological Survey\n\nExample: Landsat-7 image courtesy of the U.S. Geological Survey\n\nSee the\n[USGS Visual Identity System Guidance](https://www.usgs.gov/information-policies-and-instructions/usgs-visual-identity-system)\nfor further details on proper citation and acknowledgement of USGS products.\n\n### Citations\n\nCitations:\n\n- GLS 1975 image courtesy of the U.S. Geological Survey\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('LANDSAT/GLS1975');\nvar falseColor = dataset.select(['30', '20', '10']);\nvar falseColorVis = {\n gamma: 1.6,\n};\nMap.setCenter(44.517, 25.998, 5);\nMap.addLayer(falseColor, falseColorVis, 'False Color');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/LANDSAT/LANDSAT_GLS1975) \n[Landsat Global Land Survey 1975](/earth-engine/datasets/catalog/LANDSAT_GLS1975) \nThe 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 ... \nLANDSAT/GLS1975, global,gls,landsat,radiance,satellite-imagery,usgs \n1972-07-25T00:00:00Z/1983-02-20T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.usgs.gov/core-science-systems/nli/landsat/global-land-survey-gls)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_GLS1975)"]]
