Validate geometry can't check polygon with puncture?

Question

Hi,
I have polygon with puncture as follow:
POLYGON ((100.378750779898 -0.310282546668259, 100.378772459506 -0.310271543916926, 100.378838852504 -0.310235840196097, 100.378845732154 -0.310224416657996, 100.378844002915 -0.31020930373441, 100.37871739762 -0.309977750136478, 100.378616547328 -0.310045414011517, 100.378548060368 -0.309924611880424, 100.378750779898 -0.310282546668259))
According to OGC simple feature it is invalid geometry because it has a puncture. ArcGIS SDE can't render this geoemetry. However, sdo_geometry.validate_geoemetry says it is a valid geometry. Why sdo doesn't consider this as an invalid geoemrty?

Answer 1

Hi,
It'd be useful if you provided a bit more information with your post:
- your name (user3907494 ?)
- the version of Oracle
- the tolerance that you validated at
Note that the geometry doesn't actually seem to be self intersecting - there seems to be an 8mm gap at the point where you might think it self intersects.
I validated the geometry on 10.2.0.5 and 11.2.0.2 and got different results.
Invalid on 10.2.0.5:
SQL> select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi
PL/SQL Release 10.2.0.5.0 - Production
CORE    10.2.0.5.0      Production
TNS for 64-bit Windows: Version 10.2.0.5.0 - Production
NLSRTL Version 10.2.0.5.0 - Production
5 rows selected.
SQL> select sdo_geom.validate_geometry_with_context(
  2    sdo_geometry(2003, 8307, null, sdo_elem_info_array(1,1003,1),
  3    sdo_ordinate_array(
  4    100.378750779898, -0.310282546668259,
  5    100.378772459506, -0.310271543916926,
  6    100.378838852504, -0.310235840196097,
  7    100.378845732154, -0.310224416657996,
  8    100.378844002915, -0.31020930373441,
  9    100.37871739762, -0.309977750136478,
10    100.378616547328, -0.310045414011517,
11    100.378548060368, -0.309924611880424,
12    100.378750779898, -0.310282546668259
13    )), 0.00005) as result
14  from dual;
RESULT
13349 [Element <1>] [Ring <1>][Edge <8>][Edge <6>]Valid on 11.2.0.2
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE    11.2.0.2.0      Production
TNS for Linux: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production
5 rows selected.
SQL> select sdo_geom.validate_geometry_with_context(
  2    sdo_geometry(2003, 8307, null, sdo_elem_info_array(1,1003,1),
  3    sdo_ordinate_array(
  4    100.378750779898, -0.310282546668259,
  5    100.378772459506, -0.310271543916926,
  6    100.378838852504, -0.310235840196097,
  7    100.378845732154, -0.310224416657996,
  8    100.378844002915, -0.31020930373441,
  9    100.37871739762, -0.309977750136478,
10    100.378616547328, -0.310045414011517,
11    100.378548060368, -0.309924611880424,
12    100.378750779898, -0.310282546668259
13    )), 0.00005) as result
14  from dual;
RESULT
TRUEI'm not too sure why this happens. Maybe someone else can comment?
Regards,
John