[postgis-tickets] [PostGIS] #3274: PostGIS 2.1 dependency on proj.4

[PostGIS]

#3274: PostGIS 2.1 dependency on proj.4
-----------------------+---------------------------
  Reporter:  watsonta  |      Owner:  pramsey
      Type:  defect    |     Status:  closed
  Priority:  high      |  Milestone:  PostGIS 2.1.9
 Component:  postgis   |    Version:  2.1.x
Resolution:  invalid   |   Keywords:  proj4
-----------------------+---------------------------
Changes (by strk):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 Alright, response in code, libpgcommon/lwgeom_transform.c circa line 730:
 {{{
 #if POSTGIS_PROJ_VERSION >= 48
         /* For newer versions of Proj we can pull the spheroid paramaeters
 and initialize */
         /* using them */
         pj_get_spheroid_defn(pj1, &major_axis, &eccentricity_squared);
         minor_axis = major_axis * sqrt(1-eccentricity_squared);
         spheroid_init(s, major_axis, minor_axis);
 #else
         /* For old versions of Proj we cannot lookup the spheroid
 parameters from the API */
         /* So we use the WGS84 parameters (boo!) */
         spheroid_init(s, WGS84_MAJOR_AXIS, WGS84_MINOR_AXIS);
 #endif
 }}}

 So basically PostGIS can work also with older Proj4 versions, but it needs
 to know at compile time.

 It then looks like watsonta's binary was built against Proj 4.8 but was
 running against a previous version. Very likely a bug in the binary
 package, or its dependencies (proj-4.8+ being a dependency of the _binary_
 postgis as built by the packager).

 Feel free to file a separate ticket if you can reproduce the problem by
 building PostGIS yourself.
 Thank you.

--
Ticket URL: <https://trac.osgeo.org/postgis/ticket/3274#comment:3>
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