[Proj] ACT Standard Grid (AGD66)

Andre Joost andre+joost at nurfuerspam.de
Mon Apr 13 20:51:55 PDT 2015


Am 14.04.2015 um 02:18 schrieb Richard Greenwood:
> On Mon, Apr 13, 2015 at 11:39 AM, Hermann Peifer <peifer at gmx.eu> wrote:

>> ,
>> so you should use
>>
>> +towgs84=-129.19,-41.21,130.73,.25,.37,.33,-2.96
>>
>
> If you reverse the sign then shouldn't it be:
>
> +towgs84=129.19,41.21,-130.73,-.25,-.37,-.33,2.96
>
> or am I missing what you are suggesting?
>

Only the rotations have to be reversed. The first three are shifts, and 
the last one is a scale factor. These remain unchanged.

HTH,
André Joost





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