Questions tagged [night-time-images]

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Filtering nighttime lights pictures based on city

I am working in QGIS Desktop 3.24.1 Tisler. I just want to only consider nighttime lights data from images (from https://www.ngdc.noaa.gov/eog/dmsp/downloadV4composites.html) of certain cities. How ...
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How to calculate sum of night light radiance for each feature in a feature collection?

I have a shapefile which contains 36 polygons (districts/counties). For each district, I want to calculate sum of lights (as well as count total number of pixels). I tried following code but failed. ...
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Collapsing pixels in my raster

I want to use a map of VIIRS nightlights data, the annual VNL V2 2015 masked data from https://eogdata.mines.edu/products/vnl/ and overlay (intersect with) the nightlights data onto a map of various ...
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Unable to extract actual NTL Values from VIIRS imagery

I'm trying to calculate the aggregated luminosity values of VIIRS Nightlight Imagery, but the CSV file that's outputted contains 0.0 values for all the images. This is the script in the GEE console ...
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Resampling nighttime satellite imagery with rasterio (Python)

I am working with a GeoTIFF file from the Earth Observation Group (3rd download on this page). Once extracted, the file is too large (5.6gb) to do much with on my laptop - so I am trying to downsample ...
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How to determine mean VIIRS Nighttime Day/Night Band Composites Version 1 for each district (county)?

How to determine mean VIIRS Nighttime Lights for each district (county) shapefile attached ? The exported csv file does not contain required results! var start = ee.Date('2017-01-01'); var end = ee....
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531 views

Export Image with attribute table in Google Earth Engine

I am quite new to Google Earth Engine. I am trying to export a VIIRS night-time light image with an attribute table attached (displaying the mean, median etc) which is also clipped to India (I am ...
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Is it possible to detect human settlements by night light data?

I am working on a project in which human settlements are identified using geo-tagged Twitter data. Since this project is focused on developing countries (mostly African), I am afraid that many human ...
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Why is there an extra pixel in some world images, 43201 vs 43200?

I have two images both of which have world nighttime lights. They are off by 1 pixel and the equivalent decimal degrees, but the 43201 image seems to be "too large." Using gdal: Driver: GTiff/GeoTIFF ...
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-2 votes
1 answer
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Google Earth Engine pixels's spatial resolution of Suomi NPP VIIRS DNB nighttime lights data

I would like to know in meters exactly the pixels' spatial resolution corresponding to :15 Arc Seconds" of VIIRS Nighttime Day/Night Band Composites Version 1 data from Google Earth Engine ...
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Querying Landsat 8 night images in Google Earth Engine? [duplicate]

Apparently, Landsat 8 occasionally acquires images at night-time during ascending passes. However, in the Google Earth Engine data catalogue (https://developers.google.com/earth-engine/datasets/...
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