gis属性表没有area如何计算面积

Posted 2023-05-06

参考技术A 可以手动添加。
在属性表中手动添加一个字段，类型为float，名字就叫“面积”好了，然后在“面积”字段上右键菜单中选“计算几何”，设置相关参数后确定就成了。

leetcode 223. Rectangle Area 计算面积---------- java

Find the total area covered by two rectilinear rectangles in a 2D plane.

Each rectangle is defined by its bottom left corner and top right corner as shown in the figure.

Assume that the total area is never beyond the maximum possible value of int.

 

 

计算图形面积；

 

 

两个矩形面积减去重复的面积即可。

public class Solution {
    public int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) {
        
        int area = (C - A) * (D - B) + (G - E) * (H - F);
        
        if (B > H || F > D || A > G || C < E)
            return area;
        int x1 = Math.max(A, E);
        int y1 = Math.max(B, F);
        int x2 = Math.min(C, G);
        int y2 = Math.min(D, H);
        int result = (x2 - x1) * (y2 - y1);
        if (result > 0){
            return area - result;
        } else {
            return area + result;
        }
    }
}