Quick and easy: http://geocat.kew.org/

There are many tools in GIS environment and R. Especially the AOO is very easy to calculate in GIS environment. Otherwise you could try GeoCATuploading your data in csv format.

Niche modelling/habitat suitability modelling techiques. Use Maxent Software with ERDAS, ARCGIS, UNIGIS etc.

For more see this page:

https://www.researchgate.net/post/How_to_know_calculate_the_Extent_of_Occurrence_EOO_and_Area_of_Occupancy_AOO_for_a_threatened_plant_taxa

Thanks Mauro. I tried GeoCat and its very interesting software by Kew. Can you please help me to save the map in JPG files in GeoCat? Thanks to Shalini also for providing the informative link.

 Hi Dhyani, sorry but I did not notice that you asked me something. Unfortunately there is no this setting in geocat but, if a JPG is sufficient, you could just press "print" on your keyboard and then paste the image of your screen in any image processing software like paint or gimp.

Thanks Marco

Quick and easy: http://geocat.kew.org/

Thanks Richard. I will see and use it.

I would suggest you to use Geocat.

It gives good result if you have at least one GPS point collected from each parts of a study site.

https://gdauby.github.io/ConR/

I second the ConR package. Very user-friendly and makes nice graphical outputs.

Use GeoCAT

GeoCAT is designed for the Extent of Occurrence (EOO) and Area of Occupancy (AOO)!