I am going for the occupancy and distribution of Brown bear in my research for this I need data like NDVI, snow cover, bare area, cultivated land etc. How can I download these layers? Please someone provide me link and guide me. Thanks to all
Hi shakil;
Some of your requested layers are available on GIS libraries. However, some of then are not free or open access.
1) NDVI: you can calculate ndvi following this simple tutorial (for Qgis);
https://www.hatarilabs.com/ih-en/how-to-calculate-ndvi-using-landsat-8-images-and-qgis
2) bare areas and cultivated lands; for this end you need CORINE land cover layer of similar (grid and pixel size varies a lot depending on your study objetives, do not forget this. Quote: do not change big grid size (e.g. 1km) to a lower one! (E.g. 200m) which will in turn increase layer weight in your GIS program. You can simply select the bare land and cultivated land using the atributes table of this land-cover layer. (Search somewhere the method, there are some useful youtube tutorials).
3) snow cover; I have never work with this kind of layers, however I find this discussion on researchgate that could be useful for this end; https://www.researchgate.net/post/Which_Methods_Could_be_Used_for_Snow_Depth_Estimation_by_Remote_Sensing_or_Statistical_Modeling
Good luck.
Best regards
Jon
Thanks Jon morant etxebarria for your answer. I think it will work and I wil be able to find required data
We already have DEM layer file and can download them online in our country also we have Natural resources organization in each provinces. we asked them. I think you have same centers.
For DEM go to Earthexplorer (USGS) site.
For NDVI you need to download layers from Glovis (USGS), to accurately calculate the NDVI.
For Land cover, go to FAO site you will get help there.
Thanks Hussain Ali for your comments. I have DEM and NDVI and I hope I will get landcover layers as well from FAO.
Hi dear bro you can download globe cover (2009)..just type this on google and then after downlaod,you can do unsupervise classification in Argis..another option when you will downlaod they will give you one extra excell file..where each layers value and bands represents differents feature...another option you need to do such kind of analysis in Argis spaitial analysis there is option called mask..so you can easily extract your required landcover from globe cover....3D analysis in argis also make such a analysis..we can create your own DEM from the elvation and coordiantes then you extrect..slope.aspect and viewshed ...then raster calcuater need used for create buffers ...so each buffers you can covert into raster layer,,,thank you can do NVDI...4 bands..
Hi shakeel! Go to Glovis, and you can download data layers for the particular area and later calculate NDVI.
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