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How can I extract reflectance values from Landsat images?
I am currently using Google Earth Engine to extract surface reflectance values from a collection of Landsat images. The approach I am using imports my field site locations (point data) as a feature collection and uses the getRegion function to extract band values from a Landsat image collection at each point.
When does Landsat Collection 1 go into effect?
PLEASE NOTE : Landsat Collection 1 based forward processing will remain in effect through December 31, 2021, concurrent with Landsat Collection 2 based forward processing. Starting January 1, 2022, all new Landsat acquisitions will be processed into the Collection 2 inventory structure only.
How to import Landsat 8 data into L8?
Either import that dataset using the Import button and rename it to l8, or copy the ID into the image collection constructor: It’s worth noting that this collection represents every Landsat 8 scene collected, all over the Earth. Often it is useful to extract a single image, or subset of images, on which to test algorithms.
Where can I download new scenes from Landsat?
Newly acquired Landsat 7 and Landsat 8 scenes become available for download typically less than 12 hours after data acquisition. Landsat Collection 1 Level-1 scenes are available for download at no charge from EarthExplorer. They can be found under the Landsat category on the Data Set tab as shown in this image.
How to extract reflectance values from Google Earth?
I am undertaking a project that is relating field measurements of fire severity to band values and spectral indices derived from Landsat imagery before and after the fire. I am currently using Google Earth Engine to extract surface reflectance values from a collection of Landsat images.
How to use Gee to extract pixel values?
GEE has many functions and some times they are a bit tricky to use. This would be my way: @Rodrigo, thank you for your prompt reply. The point extraction code worked perfectly for that example.
Where can I find Landsat data in Earth Engine?
Landsat data is available in Earth Engine in its raw form, as Surface Reflectance, TOA-corrected reflectance, and in various ready-to-use computed products such as NDVI and EVI vegetation indices.