4Gu J, Chen J, ZhouQ M. A hierarchical object-oriented approach for extracting residential areas from high-resolution imagery[C]. Hannover, Germanny: ISPRS Hannover Workshop 2005, High-resolution Earth Imaging For Geospatial Information, 2005.
5Zha Y, Gao J. Use of normalized difference built-up index in automatically mapping urban areas from TM imagery[J]. International Jourmd of Remote Sensing, 2003, 24(3): 583-594.
6Atkinson P M, Cuban P J.Choosing an appropriate spatial resolution for remote sensing investigations[J].Pbotogrammetric Engineering and Remote Sensing, 1997, 63(12): 1345-1351.
7Woodcock C E, Strahler A H. The factor of scale in remote sensing [J].Remote Sensing of Envimnment, 1987, 21(3): 311-332.
