Hi Daniel,

Look at this nice datasets, I use so often.

https://download.gebco.net/

http://www.bio-oracle.org/explore-data.php

https://www.worldclim.org/bioclim

Also, you can create by yourself a few data, such as orientation, slope, distance from the shore, fetch...

Good luck,

Pedro

Hi ,

you can download DTM and satellite imagery from these websites:

https://earthexplorer.usgs.gov/

https://scihub.copernicus.eu/dhus/#/home

https://glovis.usgs.gov/app?fullscreen=0

https://earthexplorer.usgs.gov/

You use sentinel 2 multispectral data 10m resultion in rededge band for mangrove analysis

You get the free data in coperniques website

http://www.nara.ac.lk/

This is the government body responsible for collecting data requested by you. Contact a person in this institution, you may get a help.