GetProjectionFactor

unit-functions GetProjectionFactor

syntax

  • GetProjectionFactor(gridunit)

definition

GetProjectionFactor(gridunit) results in a parameter with a dpoint value-type, indicating the gridsize in both X and Y directions.

The grid size is expressed in the unit of the coordinate system.

description

The GetProjectionFactor function in combination with the getprojectionfactor function was used to calculate grid relations for a set of points.

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 = "[{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> projFactor := GetProjectionFactor(rdc_100);

result: projFactor = [(-100.0, 100.0)].

see also