spatial aggregation造句

first, based on location theories and systems model methods, the location factors were quantified by establishing the location advantage models ( including economic attraction model and spatial aggregation model ) and location feasibility models . the location advantage grades and location feasibility types were set up, according to the result of location models of daxing district . secondly, based on the landscape analysis of the 4 towns chosen form location grades system, the landscape status has been judged by landscape pattern analysis, then the relationship of location typies and landscape pattern has been analyzed
首先，依据区位理论，运用系统模型方法，将区位因素定量化建立区位优势度模刑(包括经济吸引度模型和空间聚集度模型)和区位适宜度模型，对大兴区小城镇体系的区位状况进行分析并划分区位优势度等级，分析其区位适宜状况，判断其适宜度类型；其次，对4个典型区位小城镇进行景观格局分析，判断景观格局的优势与不足，并分析区位类型与景观格局的相互关系；第三，建立格局优化模型，综合考虑经济、生态和社会三者效益，得出研究区各类景观的最优比例，并对典型城镇进行优化格局功能分区。
It's difficult to find spatial aggregation in a sentence. 用spatial aggregation造句挺难的