- Calculating top of atmosphere (TOA) reflectance with QGIS
The data in Landsat-8 images is represented by Digital Numbers (DN). For the calculation of environmental indices such as the Normalized Difference Vegetation Index, reflectance values are often used instead of DN. The purpose of the following exercise is to calculate the top of atmosphere reflectance (TOA reflectance) with a solar angle correction for band […]
- Import multiple Landsat-8 natural colour images with Python
Sometimes you need to do the same procedure multiple times. QGIS 3.10 does allow you to process in batch. Nevertheless, sometimes it is easier to just run a little script that does all the work for you. Imagine you need to import several Landsat-8 natural colour images into QGIS like we did in: Importing Landsat […]
- Importing Landsat-8 imagery into QGIS
For this exercise we use a Landsat-8 image of Portugal (path: 204, row: 32). Landsat satellite data is available on https://earthexplorer.usgs.gov/. A Landsat-8 image consists of several bands, each represented with a TIFF file in your data download. Each file contains radiance data of the Earth surface within a certain window of the spectrum. band […]