The two maps illustrate the changes of a school campus from 1985 to 2012. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The two given pictures delineate a school campus in its development in a period of 27 years, starting from 1985. As can be seen from the diagrams, it is clearly evident that there were a number of shifts taking place in the school such as the presence of new classrooms and the shrinkage of a playing field. In 1985, around 1500 students enrolled in the school. Its office was located in the Northeast corner. Adjacent to the office building, there was a car park. To the South of the office, a library and its parking lot were constructed. The area opposite them was a two-story classroom building. Towards the South, there was a playing field. Further transformations could be seen in 2012 when the number of students increased to 2300. One of the significant development was that the school built another story for the classroom block and obtained a part of the playground to convert it into two new classrooms. The year 2012 also witnessed the erection to sports facilities such as a swimming pool and fitness club which led to the reduction in the size of the original playing field. The library and its parking lot were demolished to make way for a computer room and trees. The office building and the car park next to it remained unchanged.