Google Earth Engine——NOAA/DMSP-OLS/NIGHTTIME_LIGHTS，DMSP数据由美国空军气象局收集

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发布于 2024-02-02 12:18:02

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发布于 2024-02-02 12:18:02

The 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 cases where two satellites were collecting data, two composites were produced.

Image and data processing by NOAA's National Geophysical Data Center. DMSP data collected by US Air Force Weather Agency.

国防气象计划(DMSP)的作业线扫描系统(OLS)具有独特的能力，可以探测夜间的可见和近红外(VNIR)发射源。

DMSP-OLS夜间灯光时间序列的第4版包括使用历年所有可用的DMSP-OLS平滑分辨率存档数据进行的无云合成。在有两颗卫星收集数据的情况下，就会产生两个合成物。

图像和数据处理由NOAA的国家地球物理资料中心进行。DMSP数据由美国空军气象局收集。

Dataset Availability

1992-01-01T00:00:00 - 2014-01-01T00:00:00

Dataset Provider

Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines

Collection Snippet

ee.ImageCollection("NOAA/DMSP-OLS/NIGHTTIME_LIGHTS")

Resolution

927.67 meters

Bands Table

Name	Description	Max*
avg_vis	The average of the visible band digital number values with no further filtering.	63
stable_lights	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.	63
cf_cvg	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.	126
avg_lights_x_pct	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.	63

* = Values are estimated

数据说明：

NOAA data, information, and products, regardless of the method of delivery, are not subject to copyright and carry no restrictions on their subsequent use by the public. Once obtained, they may be put to any lawful use. The forgoing data is in the public domain and is being provided without restriction on use and distribution.

代码：

var dataset = ee.ImageCollection('NOAA/DMSP-OLS/NIGHTTIME_LIGHTS')
                  .filter(ee.Filter.date('2010-01-01', '2010-12-31'));
var nighttimeLights = dataset.select('avg_vis');
var nighttimeLightsVis = {
  min: 3.0,
  max: 60.0,
};
Map.setCenter(7.82, 49.1, 4);
Map.addLayer(nighttimeLights, nighttimeLightsVis, 'Nighttime Lights');