Download NDBI using Landsat 8 in GEE | Open in ArcGIS
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- Опубликовано: 26 авг 2024
- In this video tutorial i will show you how to download NDBI using Google Earth Engine and Open Downloaded NDBI image in ArcGIS.
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The Normalized Difference Built-up Index (NDBI) is a spectral index commonly used in remote sensing and satellite imagery analysis, including with Landsat 8 data. It's designed to highlight built-up or urban areas in an image by exploiting the differences in reflectance between urban surfaces and non-urban surfaces like vegetation and soil.
The formula for calculating NDBI using Landsat 8 data is:
NDBI = (SWIR2 - NIR) / (SWIR2 + NIR),
Where:
• SWIR2 (Short-Wave Infrared 2) is the reflectance value in the 1.55-1.75 μm range.
• NIR (Near-Infrared) is the reflectance value in the 0.85-0.88 μm range.
The NDBI values typically range from -1 to 1:
• Positive values (closer to 1) indicate built-up areas.
• Negative values (closer to -1) indicate non-built-up areas like vegetation and soil.
Here's how you can interpret the results:
• High positive NDBI values correspond to dense urban areas with impervious surfaces like roads, buildings, and pavement.
• Low or negative NDBI values correspond to non-urban areas, such as vegetation, water bodies, and bare soil.
To calculate NDBI using Landsat 8 imagery, you'll need to access the respective bands for SWIR2 and NIR from the satellite data and then apply the formula to each pixel to generate the NDBI image. Keep in mind that atmospheric correction and other preprocessing steps might be necessary to get accurate results.
In Landsat 8, the relevant bands are typically Band 5 for SWIR2 and Band 4 for NIR.
Remember that the effectiveness of NDBI can vary based on factors like local conditions, scale of analysis, and the presence of shadows, so it's often used in conjunction with other indices and data sources for a more comprehensive understanding of land cover and land use.
Earth Engine and ArcGIS video is incredibly informative! I appreciate how it explains complex Java programming concepts in such a clear and accessible manner. this video does an excellent job of showcasing its capabilities. I particularly liked the section on downloadable content of image, as it shed light on a practical application of Google Earth Engine and ArcGIS. Keep up the great work, and please continue sharing more insightful content like this
Thanks Bro, I appreciate your valuable comment
Very interesting and explanatory video, excellent teaching to develop the concepts, however I have a question, how could I measure the effectiveness of the resulting index for my area of study based on a confusion matrix and kappa index? Grateful and I await your response.
Good
Thank you
Random forest classification method in gee
Ok Bro