From 660de753d4229fad27c92228110587efd8a99dc9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=8B=8F=E5=B0=B9=E5=B2=9A?= <770236076@qq.com>
Date: Tue, 9 Mar 2021 13:54:01 +0800
Subject: [PATCH] aa

---
 business/jxstore/report/report.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/business/jxstore/report/report.go b/business/jxstore/report/report.go
index b36b631da..34c09f10a 100644
--- a/business/jxstore/report/report.go
+++ b/business/jxstore/report/report.go
@@ -471,9 +471,11 @@ func CalculateCoverArea(coordinate []string, vendorID int) (area float64) {
 	}
 	var sum float64
 	for i := 0; i < len(xyList)-1; i++ {
-		sum += (xyList[i+1][0] - xyList[i][0]) * (xyList[i+1][1] + xyList[i][1])
+		// sum += (xyList[i+1][0] - xyList[i][0]) * (xyList[i+1][1] + xyList[i][1])
+		sum += xyList[i][0]*xyList[i+1][1] - xyList[i+1][0]*xyList[i][1]
 	}
-	sum += (xyList[0][0] - xyList[len(xyList)-1][0]) * (xyList[0][1] + xyList[len(xyList)-1][1])
+	// sum += (xyList[0][0] - xyList[len(xyList)-1][0]) * (xyList[0][1] + xyList[len(xyList)-1][1])
+	sum += xyList[len(xyList)-1][0]*xyList[0][1] - xyList[0][0]*xyList[len(xyList)-1][1]
 	sum /= float64(2)
 	area, _ = decimal.NewFromFloat(sum).Round(3).Float64()
 	return area