GetProjectionOffset

Unit functions GetProjectionOffset

syntax

• GetProjectionOffset(gridunit)

definition

GetProjectionOffset(gridunit) results in a Parameter with a dpoint Value type, indicating the coordinate of the top left grid cell in the coordinate system.

description

The GetProjectionOffset function, in combination with GetProjectionFactor was used to calculate Grid relations for a point vector domain.

Since GeoDMS version 7.015 this is done with the Value function, see Configuration examples Grid.

applies to

• Unit gridunit with Point value type of the group CanBeDomainUnit

since version

5.44

example

unit<fpoint> rdc_meter: range = "[xy(0; 300000), xy(280000; 625000))";
unit<spoint> rdc_100 :=
   range(
      gridset(
          rdc_meter
         ,point(  -100f,   100f, rdc_meter)
         ,point(625000f, 10000f, rdc_meter)
         ,spoint
      )
      ,point(   0s,    0s)
      ,point(3250s, 2700s)
   );

parameter<dpoint> projOffset := GetProjectionOffset(rdc_100);

result: projOffset = [(625000.0, 10000.0)].

see also

• GetProjectionBase
• GetProjectionFactor