stftrf/stitrf/ststrf/stqtrf

DCL:GRPH1:STPACK: Transformation Functions:Explanation of Subroutines: Coordinate Transformation

6.3.1 stftrf/stitrf/ststrf/stqtrf

1.

Function

Performs a normalization transformation (transformation of UC and VC)

2.

Call

vx, vy = NumRu::DCL.stftrf(ux,uy)
ux, uy = NumRu::DCL.stitrf(vx,vy)
NumRu::DCL.ststrf(lmapa)
lmapa = NumRu::DCL.stqtrf()

3.

Explanation of Arguments

ux,uy (R) Coordinates in UC.

vx,vy (R) Coordinates in VC.

lmap (L) A flag indicating a map projection function

4.

Notes

(a)
These functions internally call STFRAD, STFROT, and STFTRN.
(b)
When LFLAG=.TRUE., STFTRN is called after coordinate rotation by STFROT.
(c)
In map projections, when transformation is not possible due to such factors as a singular point, the value of the internal variable rundef handled by glpget/glpset is returned. (The initial value is -999.0.)

`ux,uy`	`(R)`	Coordinates in UC.
`vx,vy`	`(R)`	Coordinates in VC.
`lmap`	`(L)`	A flag indicating a map projection function