Hasan Ahmed

8 Questions 5 Answers 0 Followers

Questions related from Hasan Ahmed

If I use Surface Reflectance data of Landsat, do the constants of Vegetation Index (e.g, Advanced Vegetation Index) change?

The formula of Advanced Vegatation Index for Landsat 7 is: AVI = [(B4 + 1) (256 - B3) (B4 - B3)] ^ 1/3 and for Landsat 8, AVI = [(B5 + 1) (65536 - B4) (B5 - B4)] ^ 1/3 Now if I transform the DN...

12 December 2017 8,615 6 View

How to calculate Advanced Vegetation Index(AVI) on Landsat 8?

I couldn't find the formula to calculate Advanced Vegetation Index of Landsat 8 products. I know the formula of AVI using Landsat 7. How do I calculate AVI for Landsat 8 Reflectance Data?

11 November 2017 5,462 9 View

What things should I consider if I want to use Landsat-5 and Landsat-8 Images for comparing Disturbance Index?

I want to perform Tasseled cap transformation on Landsat 5 and Landsat 8 Images to get forest Disturbance Index. And I want to compare the forest Disturbance of Different Years ( before 2011 by...

09 September 2017 3,335 3 View

Can we obtain Bottom of Atmosphere Reflectance from Landsat? If we can, How?

I know we can get Top of Atmosphere Reflectance from Landsat. But can we get Bottom of Atmosphere Reflectance data from image? If possible, how to do the process?

09 September 2017 764 2 View

How to measure Canopy Coverage of a square plot using GRS Densiometer or Spherical Densiometer?

My field sample plots are 30x30m square and I have to measure canopy coverage along with other field data. Ho can I use GRS densiometer or Spherical densiometer to measure the canopy coverage of...

04 April 2017 8,902 3 View

Is it possible to detect forest disturbance in temporal scale with a baseline data of present year?

I want to detect the natural disturbance of a subtropical hill forest(Bangladesh) using Landsat imagery. I can have the field data/baseline data of present time only. But I also want to detect the...

03 March 2017 2,402 6 View

How to perform tasseled cap transformation of LandSat 8 imagery in ArcGIS 10.4?

I'm interested in the detailed method of performing tasseled cap transformation of LandSat 8 imegary in ArcGIS 10.4 software.

03 March 2017 3,173 2 View

How can I detect forest disturbance from Landsat image?

Is it possible to identify tree felling gap from Landsat Data? Or which type of image will be more suitable for the detection of tree felling gap identification and detection of spatio-temporal...

11 November 2016 5,350 11 View