Gathering from the meagre documentation available, it is indeed likely that they all are separate locations.
Yes, I think it is correct, given the current knowledge about this WHS, to treat it as comprising 7 separate "locations" - it is also "useful" to do so since it highlights the UNESCO-inscribed buildings among the numerous others.
Those of us who have reviewed the site (Els and myself from early 2011) have all concluded that 7 churches were
indeed inscribed but that information about the core zone boundary/ies is missing - both "on site" and in the UNESCO documentation.
I have just carried out a "Web based" investigation to see if anything "better" is available and uncovered a report from around mid 2015 (it doesn't possess an "official" date but was submitted in Oct 2015) which addresses the issue of protection of Old Goa. From it I think we must conclude that the WHS indeed needs still to be regarded as being made up of 7 separate "locations"
A few relevant quotes"1968, The Archaeological Survey of India (ASI) set up an office in Old Goa and declared 21 monuments of National Importance in Goa, including 14 of them in Old Goa. In 1978, The Goa Ancient Monuments and Archaeological Sites and Remains Act were passed and six monuments in Old Goa were declared as being of regional importance. In 1986, of the fourteen monuments, seven monuments were adopted by UNESCO as
"Group of Monuments" of World Heritage""Following are the selected monuments by UNESCO. i. Se Cathedral, ii. Basilica of Bom Jesus iii. Convent of St. Francis of Assisi iv. Chapel of St. Cajetan v. Ruins of the Convent of St Augustine vi. Church of Our Lady of Rosario vii. Chapel of St. Catherine. At present Goa has 1 World heritage site includes 7 monuments, 21 Archaeological Survey of India (ASI) protected monument and 51 monuments comes under state protection. 7 UNESCO sites are located only in "Old Goa"
But the report also seems to indicate that these monuments don't (or didn't as recently as mid 2015) possess formal boundaries which provide legal protection. Such boundaries around buildings as have been defined by ASI aren't adhered to. New ("All India" as opposed to "State") laws in 2010 providing for 100 and 200 metre core and buffer boundaries around "National Monuments" don't appear to have been implemented. One map (section 3.5) indicates that the 7 monuments could be included within the boundaries of either 1, 2 or 3 core zones according to how far out the boundary might be placed!
But the report concludes that the concept of just having boundaries around individual monuments is inappropriate for a site such as Old Goa - "This monument centric approach to the world heritage site itself is main issue which needs to be addressed in order to have proper management plan in place
It really is amazing that UNESCO hasn't come down harder on India for this state of affairs (especially given the zeal with which it has pursued certain other sites from Western European countries!!). From WHC minutes the site appears to have received NO ATTENTION at a WHC since 2003 when a "State of Conservation Report" (produced by the ASI itself!!) was able to conclude that everything about the boundaries and preservation was satisfactory! - http://whc.unesco.org/document/162836
Even the report I have quoted above wasn't "Official" but had been produced by a Masters student in Infrastructure Planning from Stuttgart University. (Though I see no reason to believe that the "facts" he states about boundaries are incorrect). I note one para "If such development continues to happen it won't take long for UNESCO to step in and put World Heritage Site of Old Goa in World Heritage Site in Danger List. Thus it is of foremost importance to have proper management plan in action."
. When is UNESCO going to get round to Goa???
See - "Old Goa: A Heritage City, Urban threats and revival strategies
" - https://www.researchgate.net/publication/282778757_Old_Goa_A_Heritage_City_-_Urban_th reats_and_revival_strategies
PS. In July 2016, the Goa government "assigned renowned architect Ketak Nachinolkar the work of conducting a detailed study on various parameters concerning the heritage site.
". This was to include "work on delineation of the historic sites
". All this as part of an intention to develop a Management Plan for the site. To show that they were "serious", the powers-that-be required that "Nachinolkar has to submit his report within a month
"!!!!! Since then???? ....... nothing has been reported on the Web.
See - https://bangaloremirror.indiatimes.com/news/india/masterplan-to-preserve-old-goa-heri tage/articleshow/53025196.cms