Nighttime Light (Additional Information:) - 4
URL : https://ngdc.noaa.gov/eog/dmsp/downloadV4composites.html
Nighttime satellite imagery were accessed via Google Earth Engine). 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. The products are 30 arc second grids, spanning -180 to 180 degrees longitude and -65 to 75 degrees latitude. Several attributes are included - we used stable_lights which represents 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.These data were provided to Google Earth Engine by teh National Centers for Environmental Information - National Oceanic and Atmospheric Administration of the United States (see Supporting Documentation).CANUE staff exported the annual data and extracted values of annual mean nighttime brightness for all postal codes in Canada for each year from 1992 to 2013 (DMTI Spatial, 2015).
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Informations additionnelles
| Champ | Valeur |
|---|---|
| Dernière modification de la donnée | 18 septembre 2023 |
| Dernière modification de la métadonnée | 9 octobre 2023 |
| Créé | 18 septembre 2023 |
| Format | HTML |
| Licence | License not specified |
| Has views | False |
| Id | 97a8fa80-95cc-47b9-af9d-7931be2e873a |
| Mimetype | text/html |
| Package id | e51b9a7e-a0b9-4909-b030-0795aa7fd937 |
| Position | 0 |
| State | active |