[Proj] pj_transform arguments

[Frank Warmerdam]

Sue Dettling wrote:
> Hi,
> I just installed the debian version of the library.
> The man pages are out of date with the argument list
> for pj_transform. Can you tell me what the data_offset
> is ?

Sue,

I assume you mean "point_offset"?

int pj_transform( PJ *srcdefn, PJ *dstdefn, long point_count, int point_offset,
                   double *x, double *y, double *z )

In this case point_offset is the step size to use from one value to the
next in x, y and z arrays.  Normally this is 1, indicating that the values
are tightly packed one after the other.  But some folks have their values
in arrays of x/y/z interleaved, so they might pass a point_offset value
of three.

Best regards,
-- 
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