Melbourne's South East Water is also using the platform to reduce the cost of building a new sewer system.
"We helped them visualise underground and overground assets like buildings or people's homes and what's underneath like rocks and substrates so they can make sure they put their assets in the right place," Lennox said.
The application also helps communicate plans and the 3D images can be brought up on an iPad to explain to property owners or other stakeholders how they will be affected by an infrastructure project, he said.
The platform is also being used by geologists studying volcanoes and earthquakes.
Visual City uses technology developed by another New Zealand-born firm, Right Hemisphere, which was snapped up last month by German software giant SAP.
Business incubator The IceHouse's director of startups Ken Erskine said Visual City had great potential and had already generated international interest.
The amount of investment was not disclosed.