Remote sensing

How many Spectral Bands have the Sentinel 2 Images?

How many Spectral Bands have the Sentinel 2 Images?

The Sentinel 2 satellites have a Multi-Spectral Instrument (MSI) with 13 spectral bands that range from the visible range to the shortwave infrared (SWIR). Bands come in variable resolutions from 10 to 60 meter and their wavelenght is determined based on specific purposes.

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How to calculate the NDVI Index from a Sentinel 2 Image

How to calculate the NDVI Index from a Sentinel 2 Image

This tutorial show the procedure represent the bands of a Sentinel 2 Granule (Image) in QGIS. The representation of the image is True Color (Red, Green and Blue) This post is a part of a group of videos called “Working with Sentinel 2 Imagery on QGIS” that shows the complete procedure to download, represent and process Sentinel 2 images in ...

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Using Deep Learning to Extract Feature Data from Imagery

Using Deep Learning to Extract Feature Data from Imagery

Vector data collection is the most tedious task in a GIS workflow. Digitizing features from imagery or scanned maps is a manual process that is costly, requiring significant human resources to accomplish. Building footprint extraction from imagery provides an even more complex challenge due to shadows, tree overhang, and the complexity of roofs. Often times, this feature extraction work is ...

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How to Download Specific Granules from ESA Sentinel 2 Images

How to Download Specific Granules from ESA Sentinel 2 Images

Sentinel-2 carries an innovative wide swath high-resolution multispectral imager with 13 spectral bands for a new perspective of our land and vegetation. The mission is based on a constellation of two identical satellites in the same orbit, 180° apart for optimal coverage and data delivery. Together they cover all Earth’s land surfaces, large islands, inland and coastal waters every five days ...

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Six best Earth images from NASA’s ASTER project

Six best Earth images from NASA’s ASTER project

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) has been taking stunning photos of the earth’s surface since 1999. Aster is a joint project between NASA and Japan’s Ministry of Economy, Trade and Industry, and has been taking high resolution images of life on earth for 17 years. For the first time, the 2.95 million satellite images are now ...

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