Curb and gutter operations that use GPS systems for precision and accuracy can sometimes be challenged when working in certain locations - near buildings, under other structures, and so forth. Topcon has added the ability for its Millimeter GPS solution to work in these areas for customers using the GT-1200 series robotic total station or LN-150 robotic layout navigator. A prism solution can quickly switch these instruments to local positioning systems. The LN-150 is a self-levelling and cost-effective robotic solution, while the GT-1200 series instruments can be used in a similar manner as well as a standalone total station.