Questions tagged [ndvi]

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Importance of soil adjusted vegetation indices for indoor use

I've been doing research on vegetation indices to try and prepare for my indoor plant analysis project. I have a question about soil adjustments, specifically soil line based indices like PVI. Is ...
7
votes
2answers
375 views

How do optical satellites detect different leaf types?

In various land cover classification systems, trees are also categorised on the basis of broadleaf or needleleaf. Can someone please tell me the mechanism through which satellites detect this leaf ...
1
vote
1answer
88 views

How to get single value of NDVI value from four different directions?

I have a data set which contains NDVI (Normalized Difference Vegetation Index) values of four directions (NE, NW, SE, SW). Now, I would like to have single value which considers all 4 directions. Is ...
3
votes
0answers
48 views

How can I analyze how environmental conditions are related among different sites?

I want to analyze how the environmental conditions along the migratory route of a bird are related to the environmental conditions found at the breeding ground (which it is at high latitudes and we ...
5
votes
2answers
145 views

MODIS Surface Reflectance Data State QA Aerosol Quantity field meaning is unclear

I am trying to compare NDVI values computed from MODIS Surface Reflectance(MOD09) with the NDVI product (MOD13). MODIS Surface reflectance Collection 5 products include a Data State QA field that I ...