1. A method for determining strain on a gas turbine component: providing the gas turbine component comprising a plurality of strain sensor reference features disposed along the gas turbine component separated from one another by a plurality of first distances at a first time; reading the plurality of strain sensor reference features at a second time to determine a plurality of second distances between the plurality of strain sensor reference features; and, comparing the plurality of second distances to the plurality of first distances to determine a plurality of non-linear strain measurements between the plurality of strain sensor reference features.