[postgis-tickets] [PostGIS] #3713: Data loss on big encoded polyline
PostGIS
trac at osgeo.org
Sat Feb 18 14:57:43 PST 2017
#3713: Data loss on big encoded polyline
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Reporter: 323942 | Owner: pramsey
Type: defect | Status: new
Priority: medium | Milestone: PostGIS 2.3.3
Component: postgis | Version: 2.3.x
Resolution: | Keywords:
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Comment (by woodbri):
The encode and decode function take a precision=5 argument. This means
that it truncates the floating point numbers at that number of significant
decimal point digits. So if you encode and decode a linestring you will
not get back "exactly" the same linestring. This is the definition of the
encoding and decoding functions. So there is no error here other then
understanding what the function is doing.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3713#comment:1>
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