![map Pioneer Fire 3-d](https://i0.wp.com/wildfiretoday.com/wp-content/uploads/2016/08/3-D-map-Pioneer-Fire-3-pm-MDT-August-5-2016-copy.jpg?fit=840%2C590&ssl=1)
3-D map of the Pioneer Fire looking west. The white line was the perimeter of the at 11 p.m. MDT on July 28. The red line was the perimeter at 7 p.m. MDT on August 4, 2016. The red dots north of the fire represent heat detected by a satellite at 3 p.m. MDT August 5, 2016. The red arrows depict the fire spread on Friday afternoon.