fix: BD09MCtoBD09 error when latitude < 0 (#236)

chaofunchengfeng · web-flow · commit fc6bb6d105e9 · 2025-01-14T14:26:43.000+08:00
diff --git a/src/crs/BD09MC.ts b/src/crs/BD09MC.ts
@@ -103,7 +103,7 @@ export function BD09MCtoBD09(coord: Position): Position {
   const [x, y] = coord;
   let factors: number[] = [];
   for (let i = 0; i < MCBAND.length; i++) {
-    if (y >= MCBAND[i]) {
+    if (Math.abs(y) >= MCBAND[i]) {
       factors = MC2LL[i];
       break;
     }

Original file line number	Diff line number	Diff line change
`@@ -103,7 +103,7 @@ export function BD09MCtoBD09(coord: Position): Position {`
`103`	`103`	`const [x, y] = coord;`
`104`	`104`	`let factors: number[] = [];`
`105`	`105`	`for (let i = 0; i < MCBAND.length; i++) {`
`106`		`- if (y >= MCBAND[i]) {`
	`106`	`+ if (Math.abs(y) >= MCBAND[i]) {`
`107`	`107`	`factors = MC2LL[i];`
`108`	`108`	`break;`
`109`	`109`	`}`