NEW YORK CITY — New design renderings have been unveiled for the first two sections of the High Line, a new city park currently under construction on Manhattan’s West Side. The $170 million park will sit on top of a former elevated rail structure that sits 29 feet in the air and spans 22 city blocks above the West Chelsea and Meatpacking District neighborhoods. Section 1 of the park, located from Gansevoort Street to 20th Street, is set to open by the end of the year. Section 2, located from 20th Street to 30th Street, is expected to open by the end of 2009. Field Operations is serving as landscape architect, with Diller Scofidion + Renfro serving as project architect.