Assuming that your coordinates are in metres then anything beyond the
2nd or 3rd decimal digit is imaginary noise/ a measurement artefact. No
surveying methodology gives you millimetre accuracy on a reliable basis
so you should round all of the coordinates to the nearest metre for
realism but the nearest cm if you are optimistic.
Ian
On Thu, 6 Aug, 2015 at 7:18 AM, sunish <sunish.ku...@gmail.com> wrote:
Hello,
I have a the following kind of geometry in shape file.
POLYGON ((930363.007438882021233
1030324.872869260027073,930363.03660056903027
1030326.127382730017416,930367.170734492014162
1030345.227967930026352,930368.587681315955706
1030388.428108309977688,930369.394112769048661
1030398.673333609942347,930375.114355825004168
1030405.972964919987135,930397.797733561019413
1030394.860528319957666,930416.918734838953242
1030390.429355990025215,930417.958387276041321
1030359.943235749960877,930420.074469789979048
1030351.603456250042655,930401.197538555017672
1030344.308112310012802,930363.007438882021233
1030324.872869260027073))
When I read it with Geotools the coordinates are getting rounded off
like this:
POLYGON ((930363.007438882 1030324.87286926, 930363.036600569
1030326.12738273, 930367.170734492 1030345.22796793, 930368.587681316
1030388.42810831, 930369.394112769 1030398.67333361, 930375.114355825
1030405.97296492, 930397.797733561 1030394.86052832, 930416.918734839
1030390.42935599, 930417.958387276 1030359.94323575, 930420.07446979
1030351.60345625, 930401.197538555 1030344.30811231, 930363.007438882
1030324.87286926))
I was trying to transfer the geometries to Postgis and noticed the
issue. Is there any way to keep more accurate coordinate values?
I referred JTS and I think this is the maximum precision possible
with Java Double.
Thank you,
Sunish.
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