polygon - POSTGIS display polygon

Question

I'm trying to visualize a simple poligon exploiting open layer retrieving data from postGis database. I'm using as SRS EPSG:404000 wildcard 2D cartesian plane.

I have a polygons: "POLYGON((308.2488 254.05,924.7464 254.05,308.2488 84.6856,924.7464 84.6856,308.2488 254.05))"

Why the displayed polygon has a strange shape formed by two opposites tringles with coinciding vertex? The shape could be a simple rectangle.

Thanks

Answer 1

因为它是这样定义的：右下、左下、右上、左上、右下。如果您希望它是一个简单的矩形，请像这样更改点位置POLYGON((308.2488 254.05, 924.7464 254.05, 924.7464 84.6856, 308.2488 84.6856, 308.2488 254.05))。