Study on Extracting Building Density and Floor Area Ratio Based on High Resolution Image

Based on the analysis of the relationship between building-height and shadow-width in the high resolution satellite image-QuickBird,the paper applies the result of extracting building heights from shadow in image to the field of estimating FAR,and realizes estimating building density and FAR fast and efficaciously. Taking YuZhong District,ChongQing city for instance,by comparative analyzing the building density and FAR of the district,it can be found that the urban layout is profoundly affected by economy.The general laws are with the growing of economy,FAR improves,while the building density falls.The validating result shows that the accuracy of estimating floor-number has reached 88.3%,which has demonstrated prospecting applications of satellite remote sensing for urban purpose.