I needed to download two satellite maps of the year-2020 and year-2000 to study the land use changes. I visited usgs.gov site to download the LandSat map, where I found that LandSAT8 OLI/TIRS C2L2 is available for 2020 and LandSAT4-5 TM C2L2 is available for 2000.
Can I use these two different LandSat level for comparing land use changes?
I have used the natural color band, and here is the result.
LandSat_2000 is made by using LandSAT4-5 TM C2L2, while LandSat_2020 map is made by using LandSAT8 OLI/TIRS C2L2.
Are they Okay?
One more thing.
From 2000 (satellite) map, it is clear that the area has more vegetation, while from 2020 (satellite) map, it is clear that the area has rarely any vegetation.
When I performed NDVI analysis, I found that 2000 map has more water bodies than 2020 (though in satellite, we see that 2000 has more vegetation).
I don't understand what's wrong. I must have a gap. Can you please help?
Did you get a clear satellite image? free from clouds?
During the drought season, vegetation canopy can be affected by water stress. To prevent seasonal fluctuations in this location, you can gather images with nearer acquisition dates.
Cheshini Malavipathirana Yes. It was cloud free, and I took the images from March timeline..
Dear Baig Abdullah ,
Actually you do not have another option and you must use Landsat 5 for 2000 and Landsat 8 for 2020.
In case of NDVI, your analysis is wrong.
Mohammad Ali Koushesh Vatan Why do you think it is wrong? Each LandSat class has different NIR and Red color band, and I used them to calculate it. If the band color combination is right, what can be the mistake in NDVI map? Can you please specify?
If you take a look at those images, you can see there is no water in 2000, except river.
But your outcome included the agricultural lands as water bodies.
Mohammad Ali Koushesh Vatan Yes. That is making me so confused.
Hi follow this link
http://web.pdx.edu/~nauna/resources/10_BandCombinations.htm
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