hi Bhupender,
i spoke to someone in sap hana product group (geo spatial) about this issue. you have to use an import script, importing the data from files located on the hana server.
the hana studio > file menu > import method will not work for importing geo-spatial data. this is the method that i was trying.
if you haven't used the above mentioned import of files located on the hana server, this video on the hana academy should help.
-jamie