Arc GIS Tutorials: Layer Stack and Normalized Difference Vegetation Index (NDVI)

Chapters:
0:01 Introduction to ArcGIS Image Analysis
0:21 Connecting Folders and Data Catalog
0:57 Preparing Landsat Images for Stacking
1:25 Understanding Band Spectral Properties
2:21 Using the Composite Bands Tool
3:21 Saving Files with Correct Extensions
4:40 Interpreting Stacked Image Results

This tutorial teaches the essential process of image analysis in ArcGIS, specifically focusing on how to layer stack multispectral Landsat data for visual interpretation. You will learn how to connect folders, manage individual spectral bands, use the Composite Bands tool, and correctly assign file extensions to ensure data usability for remote sensing analysis. The video concludes with a brief introduction to the principles behind vegetation indices.

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#GIS #ArcGIS #RemoteSensing #Landsat #LayerStacking #NDVI #GeospatialAnalysis #ImageProcessing #GeographyExam #SatelliteImagery #GISCourse #Examrace

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Topic 1
Layer Stack
The multispectral data always comes with different single bands, after downloading. To perform any kind of analysis like classification, visualization etc. it is mandatory to stack all the layer or bands into one layer. Basically for multispectral data we use to stack 4 bands(minimum) that are Blue, Green, Red, and Near Infrared. Specially for Landsat 8 image Band 1 represent Coastal Aerosol band, in this video here we stack also this band. We can stack as much as bands we want as per the necessity of the study. It is the basic step for performing further image analysis part.
Topic 2
Normalized Difference Vegetation Index (NDVI)
For analysis of satellite image part there are various different types of index as per different area of interest. NDVI is one of the most popular index to find out the vegetation cover in the study area. The vegetation cover always effect the Near Infrared and Red bands of a satellite image, so to study the vegetation cover we only use these two bands. The formula to find out the
NDVI = (NIR-RED)/(NIR+RED)
The values always lies between -1 to +1, the nearer to the positive value indicates the more vegetation cover and the near to -1 implies less vegetation cover. #ugcnet #doorsteptutor #examrace