Question

我试图把信息补充到我的数据库中,在座标上添加<条码>django.contrib.gis。我写了一个<条码>南数据迁移,从数据库中取出地址,请谷歌坐标(我认为,我的最佳工具是为此使用<条码>。

接下来,我需要从<条码>WGS84:4326上调回的坐标。页: 1

I m lost among the GeoDjango docs trying to find a way to do this. This far, I gather I need to do this:

gcoord = SpatialReference("4326")
mycoord = SpatialReference("22186")
trans = CoordTransform(gcoord, mycoord)

but then, I don t know how to use that CoordTransform object.. seems to be used by GDAL s data objects, but that s overkill for what I want to do..

Answer 1

CoordTransform wouldn t work without GDAL that s true. But the rest of it is simple enough:

>>> from django.contrib.gis.gdal import SpatialReference, CoordTransform
>>> from django.contrib.gis.geos import Point
>>> gcoord = SpatialReference(4326)
>>> mycoord = SpatialReference(22186)
>>> trans = CoordTransform(gcoord, mycoord)

>>> pnt = Point(30, 50, srid=4326)
>>> print  x: %s; y: %s; srid: %s  % (pnt.x, pnt.y, pnt.srid)
x: 30.0; y: 50.0; srid: 4326
>>> pnt.transform(trans)
>>> print  x: %s; y: %s; srid: %s  % (pnt.x, pnt.y, pnt.srid)
x: 11160773.5712; y: 19724623.9117; srid: 22186

说明这一点已经改变。

Answer 2

如果贵国所有图书馆都安装正确,就没有必要使用<代码>。 Coord Transform Object, the point Object s transform 如果你知道你所希望的<代码>srid价值,那么你的工作方法就是做的。

>>> from django.contrib.gis.geos import Point
>>> pnt = Point(30, 50, srid=4326)
>>> desired_srid = 22186
>>> pnt.transform(desired_srid)
>>> pnt.ewkt
u SRID=22186;POINT (11160773.5712331663817167 19724623.9116888605058193)

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