修改视域默认值

src/Obj/Analysis/ViewShed/index.js

@@ -43,7 +43,7 @@ class ViewShedStage extends Tools {
     this.options = {}
     this.options.viewPosition = options.viewPosition;
     this.options.viewPositionEnd = options.viewPositionEnd;
-    this.options.horizontalViewAngle = (options.horizontalViewAngle || options.horizontalViewAngle === 0) ? options.horizontalViewAngle : 30.0;
+    this.options.horizontalViewAngle = (options.horizontalViewAngle || options.horizontalViewAngle === 0) ? options.horizontalViewAngle : 90.0;
     this.options.verticalViewAngle = (options.verticalViewAngle || options.verticalViewAngle === 0) ? options.verticalViewAngle : 60.0;
     this.options.visibleAreaColor = options.visibleAreaColor || '#008000';
     this.options.invisibleAreaColor = options.invisibleAreaColor || '#FF0000';