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渔网道路密度计算
2022-04-23 05:46:00 【今天学习要很快乐鸭】
渔网道路密度计算
首先准备:
投影后的北京市路网和北京市行政区划格网数据

第一步:准备面积属性
打开渔网的属性表,添加“unit_area”字段计算面积(平方公里)。
第二步:标识道路数据
为了计算每个格网所对应的道路网密度值,首先计算每个格网内的道路长度,因此,要通过【标识】工具来把每条路段在格网边界处打断,并且标识出每条路段所属的格网FID。
工具:【分析工具】—>【叠加分析】—>【标识】

roads_Identity属性数据长这样:

第三步:按网格FID汇总路网长度
先添加“length”字段计算长度(公里)。
这一步即使将每个格网的路网长度汇总起来。输出一个表Sum_Output,如下:

第四步: 连接字段至网格上
将渔网图层与生成的路网统计表进行连接:

第五步:计算密度
在格网里建好roaddensity字段,通过字段计算器,总长度/面积得到路网密度。
展示:
(温馨提醒:制作行政区的路网密度就不用做标识这一步了)

版权声明
本文为[今天学习要很快乐鸭]所创,转载请带上原文链接,感谢
https://blog.csdn.net/ShirleyLGY/article/details/115408902
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