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I want to Calculate NDVI of my Surrounding Area using Landsat 8.

I have Calculated NDVI but it is rather a very big region.

Can NDVI be calculated for a small specified region or can I extract my desired region from calculated NDVI?

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you can define a rectangular region in the "environment" of any raster tool. Click on "Environment" (if you use the forms) or set it up using arcpy.env (if you are in Python). Then define the extent that you want (make sure you also ask for snapping the pixels to the input layer)

  • Hello, 1. I have downloaded data form USGS EarthExplorer Landsat 8 2. Using band 5 and band 4 I have calculated NDVI ,but the region is very big and I want NDVI of my surrounding area , what should be my next step? – Lucifer Jul 30 '18 at 12:20
  • I don't understand your question. Do you mean that you want to clip a raster ? Then see @Mr. Che's answer. – radouxju Jul 30 '18 at 13:19
  • I have worked on Both Sentinel-2 and Landsat 8 Images but due to less spatial resolution i am unable to zoom as ndvi gets blur . what should be solution to this problem – Lucifer Aug 1 '18 at 10:05
  • sentinel-2 is 10 m. Do you mean that you need better than 10 m resolution on a large extent ? I am afraid that you will have to buy images from commercial satellites (currently the best commercial satellite has a 30 cm resolution, but you could achieve even better resolution from planes or UAVs) – radouxju Aug 1 '18 at 10:36
  • Yes I need better resolution data ,where Can I get the data and what will be its cost? – Lucifer Aug 1 '18 at 10:41
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Yes, you can do this with ArcGIS Desktop by doing the following:

  1. Create polygonal shapefile.
  2. Create a polygon that represents the region of your interest.
  3. Use Extract by mask to crop your NDVI raster.
  • I have downloaded landsat 8 dataset ,on which band should I use Polygonal shapefile – Lucifer Jul 30 '18 at 9:41
  • You have two options: 1) apply the tool for a whole NDVI file, or 2) apply the tool for each individual band and use cropped rasters to create NDVI. – Mr. Che Jul 30 '18 at 10:12
  • I can't find my desired location in downloaded landsat data as map gets blur,is there any way out ? – Lucifer Jul 30 '18 at 10:23
  • @Lucifer Not sure what you mean. It seems that the spatial resolution of Landsat is not enough to recognize your small region. – Mr. Che Jul 30 '18 at 10:34
  • Is there any way to solve spatial resolution problem I have use pan sharping technique but it was not useful to my extent – Lucifer Aug 1 '18 at 10:04
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clip the raster with the area (shapefile,geojson,geopackage, etc.) you want and then calculate the NDVI

  • Thank You for fast reply ,I tried using landsat 8 data set but I can find my desired location in downloaded data ,can you tell me how to clip(which band) for example a specific ground area and then appy ndvi(band5-band 4 )on it – Lucifer Jul 30 '18 at 9:38

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