[Proj] rHEALPix new parameters
spethm at landcareresearch.co.nz
Tue Nov 1 14:23:33 EST 2011
I've updated the code to use pj_ctx_set_errno. Thanks! What is the
command line flag for displaying the error code/error string?
On 01/11/11 09:45, Frank Warmerdam wrote:
> On Mon, Oct 31, 2011 at 1:31 PM, Michael Speth
> <spethm at landcareresearch.co.nz> wrote:
>> Hi Frank,
>> There are 4 errors that I want to generate which are only in the inverse
>> projections and not the forward. However, the E_ERROR directive seems to
>> only work in the ENTRY and SETUP functions (because it returns an int).
>> From looking at proj.c, the forward or inverse functions are called after
>> the setup code which includes the ENTRY0; I think that I am unable to check
>> in the ENTRY0 directive for the error conditions for inverse projections.
>> Is this correct?
>> So should I use the I_ERROR directive in this case? If so, it doesn't seem
>> to allow for entering errno values (its defined as -20). Can I create a new
>> directive similar to E_ERROR(err) but for I_ERROR?
> I would actually encourage you to actually explicitly call
> the error code instead of using the opaque I_ERROR
> or a similar macro. For instance in PJ_tmerc.c I now do:
> * Fail if our longitude is more than 90 degrees from the
> * central meridian since the results are essentially garbage.
> * Is error -20 really an appropriate return value?
> * http://trac.osgeo.org/proj/ticket/5
> if( lp.lam< -HALFPI || lp.lam> HALFPI )
> xy.x = HUGE_VAL;
> xy.y = HUGE_VAL;
> pj_ctx_set_errno( P->ctx, -14 );
> return xy;
> Best regards,
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Proj