Wikipedia
Sembanarkoil
Sembanarkoil (formerly Semponnarkoil) is a panchayat town in Tranquebar taluk in Nagapattinam district in the Indian state of Tamil Nadu. The town is located in the historic Thanjavur area on the banks of the river Cauvery.
Sembanarkoil lies on the shores of the Bay of Bengal between Northern Latitude 10.7906 degrees and 79.8428 Degrees Eastern Longitude. The general geological formation of the district is plain and coastal. The Cauvery and its offshoots are the principal rivers.
The marine land or coastal land has plain lands except for few sand dunes. However, there is a general tilt from coastal line to inland area. The most important feature of the district is the Cauvery River spread over with its numerous branches.