Hello dear researchers,
i am looking for online free data and site where i can download the data exact on my research area by KML file, i have already searching on earth explorer, LP DAAC, EOSDIS, land viewer but i have't fine any data because of not enough knowledge about this field, kindly recommend me any site where i can download data and 1 thing more please how to acquire the result about historical river path, please needs instruction.
Thanks
please go through
http://land.copernicus.eu/global/products/ndvi
for long term river dynamic you can use Landsat data from Earth Explorer.
See in the Google Earth Engine: https://www.google.com/intl/pt-BR/earth/outreach/tutorials/eartheng_gettingstarted.html
Hi Umair
As far as NDVI is concerned, there are ready made products available online. MODIS NDVI product is available at 250 meter spatial resolution.
https://modis.gsfc.nasa.gov/data/dataprod/mod13.php
If you need NDVI at higher spatial resolution then you may use EarthExplorer to order Level-2 product which contains NDVI
https://espa.cr.usgs.gov/
To download landsat NDVI product, you will need to upload landsat scene id in text file. You can do this by searching L1 landsat scene of your study area on earthexplorer and then copying that scene id in text file.
As far as historical river path is concerned, I think you will need to it by yourself. Again it can be done from landsat historical data by using NDWI.
may be this is of interest, looking at your area:
http://www.sentinel-hub.com/blog/sentinel-playground
pps.sentinel-hub.com/sentinel-playground/Therefore
Information of ancient river paths and meanders can be obtained quite
well by Principal Component analysis of Landsat, ASTER or Sentinel-2-data. The results will depend on the composition of the river sediments, soil development, vegetation status, etc. Therefore, severeal methods and digital image processing approches should be tested.