#12010: Document the GEOS IO Classes
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Reporter: James | Owner: jbronn
Status: assigned | Milestone:
Component: GIS | Version: 1.1
Resolution: | Keywords:
Stage: Accepted | Has_patch: 0
Needs_docs: 1 | Needs_tests: 0
Needs_better_patch: 0 |
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Changes (by jbronn):
* owner: nobody => jbronn
* needs_docs: 0 => 1
* summary: GEOSGemoentry hex method does not return HEXEWKB => Document
the GEOS IO Classes
* status: new => assigned
* stage: Unreviewed => Accepted
Comment:
!GeoDjango wraps the GEOS library. Included in the 1.1 release were
wrappers for the GEOS IO classes: `WKBReader`, `WKBWriter`, `WKTReader`,
and `WKTWriter` -- unfortunately, this is not in the documentation.
Regardless, the IO classes allow for finer-grained serialization of
(HEX)EWKB. For example:
{{{
#!python
from django.contrib.gis.geos import Point, WKBWriter
# Creating WKBWriter instance and setting SRID flag to True
wkb_w = WKBWriter()
wkb_w.srid = True
# Also, for 3D support
#wkb_w.outdim = 3
pnt = Point(1, 2, srid=4326)
# This is '0101000020E6100000000000000000F03F0000000000000040'
hexewkb = wkb_w.write_hex(pnt)
}}}
Thus, HEXEWKB support already exists it's just poorly documented. I'll
keep this ticket open until I complete the documentation for the GEOS IO
class interfaces.
--
Ticket URL: <http://code.djangoproject.com/ticket/12010#comment:4>
Django <http://code.djangoproject.com/>
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