Skip to content

Incorrect output of some spatial relationship functions #464

@mschoema

Description

@mschoema

Describe the bug

The aDisjoint and aDwithin functions do not work correctly in the tpoint-geo case.

The aDwithin function is testing for intersection between the trajectory of the tgeompoint and the geometry, which is essentially eDwithin. Instead, it should check for containement of the traj in the geometry.

The aDisjoin function does not take into account linear interpolation of the tpoint and just tests for disjointness at the instants.

To Reproduce

test=# select adisjoint(tgeompoint '[Point(0 0)@2001-01-01, Point(2 0)@2001-01-02]', geometry 'Point(1 0)');
 adisjoint 
-----------
 t
(1 row)

test=# select adwithin(tgeompoint '[Point(0 0)@2001-01-01, Point(2 0)@2001-01-02]', geometry 'Point(1 0)', 0.5);
 adwithin 
----------
 t
(1 row)

Expected behavior

test=# select adisjoint(tgeompoint '[Point(0 0)@2001-01-01, Point(2 0)@2001-01-02]', geometry 'Point(1 0)');
 adisjoint 
-----------
 f
(1 row)

test=# select adwithin(tgeompoint '[Point(0 0)@2001-01-01, Point(2 0)@2001-01-02]', geometry 'Point(1 0)', 0.5);
 adwithin 
----------
 f
(1 row)

Specifications

test=# select mobilitydb_full_version();
                                            mobilitydb_full_version                                            
---------------------------------------------------------------------------------------------------------------
 MobilityDB 1.1.0, PostgreSQL 16.2, PostGIS 3.4.2, GEOS 3.10.2-CAPI-1.16.0, PROJ 8.2.1, JSON-C 0.17, GSL 2.7.1
(1 row)

Metadata

Metadata

Assignees

No one assigned

    Labels

    bugSomething isn't working

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions