The researchers used satellite images to study how land use changed in a city over time and what caused these changes. They found that the height of the land was the most important factor for classifying different types of land, especially forests. The amount of farmland peaked in 1993, while urban areas doubled in size over 26 years but slowed down recently. Forests only started increasing recently. The biggest changes happened in bare and farm land from 1993 to 2001. The most rapid increase in urban areas was from 2001 to 2004. Urban and farmland were mostly in the middle and eastern parts of the city due to the landscape. Less bare land was found where there were more people. For every 1% increase in the city's economy, urban areas grew by 0.12%. The study suggests protecting farmland to meet food needs during industrial changes.