Follow the mission marker and get a sample from the lake. Then you have to climb a building that is 100m. The Oscorp building is to the south. Climb up. At the top, dive down. To the left, there is a marker, where you can see how far the dive took you already. Swing when reaching 100.
Next is a dive from 250. Get up the Oscorp building again, dive down till you've reached 250, then swing.