CCTV footage of Nicole Cartwright travelling on a bus before she was murdered and her bound body was dumped in a Sydney park has been released by police.

The 32-year-old's body were found close to 30m drag marks at Buffalo Hill Creek reserve in Hunters Hill on Sydney's lower north shore last week.

Police have obtained CCTV of Ms Cartwright - who lived with her parents in far western Sydney before her murder - travelling on a bus between Town Hall and Ashfield on September 28.

Detectives are appealing for public assistance to Ms Cartwright's movements before her body was dumped early on the morning of October 3.

After a council worker made the grisly discovery of Ms Cartwright's body, police were called to the site off Pittwater Road, Hunters Hill.

Ms Cartwright lived with her parents at Lansvale and had a wide circle of friends, often spending time in Sydney's CBD, Eastern Suburbs, and surrounds.

She did not own a vehicle, but frequently travelled on public transport around the Sydney area.

Police have established Strike Force Winkurra to investigate the circumstances surrounding her death.

One man in the park on the day Ms Cartwright was found, who was en route to visit relatives, told AAP the secluded reserve had long needed better lighting and security cameras.

He said his parents had once encountered a "terrified" girl walking alone late at night and had given her a lift to nearby shops.

"It is dangerous," he said.

The woman's body - discovered before 7.30am - was left covered for a number of hours just metres from a lawn mower presumably abandoned by the council worker who found her.

One local man told AAP he often came to the park to enjoy his lunch in peace. He said it was usually filled with mothers and children playing on the playground equipment.