[null,null,[],[[["\u003cp\u003eThe NOAA/DMSP-OLS/NIGHTTIME_LIGHTS dataset provides nighttime light data, valuable for studying human activities and urbanization patterns.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset offers cloud-free, yearly composites of nighttime lights from 1992 to 2014, collected by the Defense Meteorological Program (DMSP) Operational Line-Scan System (OLS).\u003c/p\u003e\n"],["\u003cp\u003eData includes average visible light, stable lights (persistent lighting sources), cloud-free coverage, and average light frequency.\u003c/p\u003e\n"],["\u003cp\u003eThe data is freely available for public use without restrictions, provided by NOAA's National Geophysical Data Center and the US Air Force Weather Agency.\u003c/p\u003e\n"],["\u003cp\u003eUsers can explore and analyze this dataset using Google Earth Engine, a platform for geospatial data analysis.\u003c/p\u003e\n"]]],["The NOAA's DMSP-OLS Nighttime Lights dataset, provided by the Earth Observation Group, spans 1992-2014. It contains cloud-free, yearly composites of visible and near-infrared emissions at night, processed from DMSP-OLS data. Key bands include `avg_vis` (average visible light), `stable_lights` (persistent light sources), `cf_cvg` (cloud-free coverage), and `avg_lights_x_pct` (light detection frequency). This data is in the public domain and available via Google Earth Engine for analysis and visualization.\n"],null,["# DMSP OLS: Nighttime Lights Time Series Version 4, Defense Meteorological Program Operational Linescan System\n\nDataset Availability\n: 1992-01-01T00:00:00Z--2014-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines](https://eogdata.mines.edu/dmsp/downloadV4composites.html)\n\nTags\n:\n[dmsp](/earth-engine/datasets/tags/dmsp) [eog](/earth-engine/datasets/tags/eog) [imagery](/earth-engine/datasets/tags/imagery) [lights](/earth-engine/datasets/tags/lights) [nighttime](/earth-engine/datasets/tags/nighttime) [ols](/earth-engine/datasets/tags/ols) [population](/earth-engine/datasets/tags/population) [visible](/earth-engine/datasets/tags/visible) [yearly](/earth-engine/datasets/tags/yearly) \n\n#### Description\n\nThe Defense Meteorological Program (DMSP) Operational Line-Scan System\n(OLS) has a unique capability to detect visible and near-infrared (VNIR)\nemission sources at night.\n\nVersion 4 of the DMSP-OLS Nighttime Lights Time Series consists of\ncloud-free composites made using all the available archived DMSP-OLS smooth\nresolution data for calendar years. In cases where two satellites were\ncollecting data, two composites were produced.\n\nImage and data processing by NOAA's National Geophysical Data Center.\nDMSP data collected by US Air Force Weather Agency.\n\n### Bands\n\n\n**Pixel Size**\n\n927.67 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|--------------------|-----|-------|------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `avg_vis` | 0\\* | 63\\* | meters | The average of the visible band digital number values with no further filtering. |\n| `stable_lights` | 0\\* | 63\\* | meters | The cleaned up avg_vis contains the lights from cities, towns, and other sites with persistent lighting, including gas flares. Ephemeral events, such as fires, have been discarded. The background noise was identified and replaced with values of zero. |\n| `cf_cvg` | 0\\* | 126\\* | meters | Cloud-free coverages tally the total number of observations that went into each 30-arc second grid cell. This band can be used to identify areas with low numbers of observations where the quality is reduced. |\n| `avg_lights_x_pct` | 0\\* | 63\\* | meters | The average visible band digital number (DN) of cloud-free light detections multiplied by the percent frequency of light detection. The inclusion of the percent frequency of detection term normalizes the resulting digital values for variations in the persistence of lighting. For instance, the value for a light only detected half the time is discounted by 50%. Note that this product contains detections from fires and a variable amount of background noise. |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\nNOAA data, information, and products, regardless of the method of delivery,\nare not subject to copyright and carry no restrictions on their subsequent\nuse by the public. Once obtained, they may be put to any lawful use. The\nforgoing data is in the public domain and is being provided without\nrestriction on use and distribution.\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('NOAA/DMSP-OLS/NIGHTTIME_LIGHTS')\n .filter(ee.Filter.date('2010-01-01', '2010-12-31'));\nvar nighttimeLights = dataset.select('avg_vis');\nvar nighttimeLightsVis = {\n min: 3.0,\n max: 60.0,\n};\nMap.setCenter(7.82, 49.1, 4);\nMap.addLayer(nighttimeLights, nighttimeLightsVis, 'Nighttime Lights');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NOAA/NOAA_DMSP-OLS_NIGHTTIME_LIGHTS) \n[DMSP OLS: Nighttime Lights Time Series Version 4, Defense Meteorological Program Operational Linescan System](/earth-engine/datasets/catalog/NOAA_DMSP-OLS_NIGHTTIME_LIGHTS) \nThe Defense Meteorological Program (DMSP) Operational Line-Scan System (OLS) has a unique capability to detect visible and near-infrared (VNIR) emission sources at night. Version 4 of the DMSP-OLS Nighttime Lights Time Series consists of cloud-free composites made using all the available archived DMSP-OLS smooth resolution data for calendar years. In ... \nNOAA/DMSP-OLS/NIGHTTIME_LIGHTS, dmsp,eog,imagery,lights,nighttime,ols,population,visible,yearly \n1992-01-01T00:00:00Z/2014-01-01T00:00:00Z \n-65 -180 75 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://eogdata.mines.edu/dmsp/downloadV4composites.html)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NOAA_DMSP-OLS_NIGHTTIME_LIGHTS)"]]
