Django GIS'coveredby 查询返回错误结果答案

【问题标题】：Django GIS' coveredby query returns wrong resultDjango GIS'coveredby 查询返回错误结果
【发布时间】：2012-03-06 07:39:39
【问题描述】：

有一个GIS被查询覆盖的问题，查询返回一个项目列表，这些项目的坐标在我搜索过的区域之外，这是怎么回事？

from django.contrib.gis.geos import Polygon
from deals.models import Deal

x1, y1 = 37.446899, 55.693455
x2, y2 = 37.666626, 55.551165
area = Polygon(((x1, y1), (x2, y1), (x2, y2), (x1, y2), (x1, y1)))
qs = Deal.objects.filter(locations__coords__coveredby=area)

def count():
    ok, failed = 0, 0
    for item in qs.filter(locations__coords__isnull=False)[:20]:
        for loc in item.locations.all():
            lon = loc.longitude
            lat = loc.latitude
            if x1 <= lon <= x2 and y1 <= lat <= y2:
                ok += 1
            else:
                failed += 1
    return ok, failed

>>> ok, failed
Out[18]: (0, 11)

【问题讨论】：

标签： django gis

【解决方案1】：

解决方法很简单：

x1, y1 = 'left bottom corner of rectangle area'
x2, y2 = 'top right corner of rectangle area'
area = Polygon.from_bbox((x1, y1, x2, y2))

附：用测试覆盖这段代码以确保:)

【讨论】：