GetProjectionOffset - ObjectVision/GeoDMS GitHub Wiki
Unit functions GetProjectionOffset
- GetProjectionOffset(gridunit)
GetProjectionOffset(gridunit) results in a parameter with a dpoint value type, indicating the coordinate of the top left grid cell in the coordinate system.
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.
- unit gridunit with Point value type of the group CanBeDomainUnit
5.44
unit<fpoint> rdc_meter: range = "[{300000, 0}, {625000, 280000})";
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)
);
unit<fpoint> projBase := GetProjectionOffset(rdc_100);
result: projOffSet = [(625000.0, 10000.0)].