COLUMBIA, S.C. - Members of the state surveyors' association will spend the next three years better defining the boundaries of state parks, the Parks, Recreation and Tourism Department said Wednesday.

The South Carolina Society of Professional Land Surveyors is donating services worth up to $1 million to survey the 30 state parks in the project.

The parks department said the work is needed as development increases around state land and concerns about encroachment rise. Some state parks, including those dating back to the 1930s, have never had formal surveys.

Work starts first at Paris Mountain State Park in Greenville County and Myrtle Beach State Park in Horry County.