After years of painstaking research, an online map marking the massacres of Aboriginal clans across Australia's colonial frontier has launched.

More than 150 sites have been recorded along the east coast, where violent attacks on Aboriginal people took place for decades after the First Fleet arrived.

Historian and conjoint Professor at the University of Newcastle Lyndall Ryan believes it will be one of the most comprehensive maps of the Frontier Wars ever produced.

"I think this project wanted to provide people with the evidence and finding the evidence has taken a long time," Professor Ryan said.

"We'd like to hope that this is a preliminary map and more and more sites will be added over time."

Professor Lyndall Ryan believes it will be one of the most comprehensive maps of the Frontier Wars ever produced. ( Supplied: University of Newcastle )

Killings 'designed not to be discovered'

Professor Ryan said finding sources to corroborate oral history of the massacres was difficult, because the killings were "designed not to be discovered".

A printed proclamation issued by Governor George Arthur (1784-1854) attempted to explain equality under the law. It is incorrectly referred to as Governor Davey's Proclamation to the Aborigines, 1816. ( Supplied: Mitchell Library, State Library of New South Wales )

Sites in Tasmania, Victoria and most sites in New South Wales and Queensland have been recorded, but Professor Ryan said much more work needed to done in other states.

"As we move further west, I think we'll find that map is going to have a lot of dots on it," she said.

Each site has been recorded alongside multiple accounts of the battles, with sources from newspaper reports, settler diaries and letters, and court records.

Professor Ryan said Tasmania was the first site where major massacres occurred — the conflict there is commonly known as the Black War.

"They went for a period of about seven or eight years, and it terms of the Aboriginal population in Tasmania, certainly the numbers were devastating," she said.

But as settlers moved north along the mainland, Professor Ryan said death counts rose dramatically.

"We've got a number of really major massacres where 60 or more [people] were killed and then we've got a very major event at Gippsland, the Warrigal Creek massacres, where over a period of about five days, about 150 people were killed," she said.

Evidence 'could help overcome uncertainty, scepticism'

Some Aboriginal communities asked the researchers not to pinpoint the exact location of where their ancestors were killed, so the map records an approximate site instead.

The dots are marked in yellow — after many communities told the researchers that red was a sacred colour which should not be used to mark deaths.

William Oswald Hodgkinson's painting Bulla, Queensland, 1861 shows armed fighting between the expedition and Aboriginal people. ( Supplied: National Library of Australia )

Each marking on the map includes a date, the number of people killed, the types of weapons used by settlers and, in many cases, the names of the perpetrators.

"If you can provide the evidence of the information, then it could help to overcome a lot of the uncertainty and scepticism," Professor Ryan said.

"I think it's making us focus on just what happened."

There are few monuments to the Frontier War across the Australian landscape, and Professor Ryan hopes that may change.

"I guess this could be the beginning," she said.

"However, we still haven't reached the point where we'll stop desecrating these sites.

"We've got a long way to go to accept the Frontier War."

The research team found many major massacres happened alongside rivers, but some battle sites are now under dams, reservoirs and weirs.

"That's where the majority of Aboriginal people were, that was where the good pastoral land was and that's where the settlers wanted to be," Professor Ryan said.

"I think it would be possible along the Murray River to have some well-identified signs [saying]: 'This was a battle site'."