The accuracy of mapping data created by engineers in CAD was lost when it was transferred to GIS. This is because outdated proprietary file formats were being used.

GIS systems often use inferior technology to CAD apps forcing staff to refer to original material, according to West Water manager of asset information engineering Grahame Anthonsen.

Anthonsen said the CAD and GIS solution, will replace General Electric's SmallWorld GIS.

It will take a year for the systems to be fully operational.

"The project will take between 12-14 months [to complete]; we are in the process of undertaking data modeling and confirming specifications," he said.