[Proj] rHEALPix new parameters

[Michael Speth]

Hello Frank,
   I am in the process of switching my test scripts to use the cs2cs 
instead of proj.  I am having trouble running the inverse tests.

This command works for proj and produces the inverse projection of HEALPix.
proj +proj=healpix -f '%.'$PERCISION'f' -I +lon_0=$1 +a=$2 +R_A 
+ellps=WGS84 -E <<EOF
$3 $4
EOF

Can you help me convert this to cs2cs?

Thanks

On 02/11/11 13:13, Frank Warmerdam wrote:
> On Tue, Nov 1, 2011 at 3:17 PM, Michael Speth
> <spethm at landcareresearch.co.nz>  wrote:
>> Hello,
>>     An example best explains my question.
>>
>> Command line
>> proj +proj=healpix -f '%.'$PERCISION'f' -I +lon_0=$1 +a=$2 +R_A +ellps=WGS84
>> -E<<EOF
>> $3 $4
>> EOF
>>
>> Output
>> ==== HEALPix Spheriod Inverse Test ====
>> [8] 0 0    0.0000    0.0000
>> [9] 0 0    45.0000    0.0000
>> [10] 0 0    -45.0000    0.0000
>> [11] 2 -2    *    *
>> [12] 2 -2    *    *
>> [13] 1 2    *    *
>> [14] 2 1    *    *
>>
>> So in the output, notice that the last 4 test result in an error (noted by
>> the *).  The output I am looking for is "invalid x or y" for the last 4 test
>> results.  Does this make sense?
> Michael,
>
> It does not seem to have been typical in the past to issue
> errors during point transformation - instead HUGE_VAL was
> returned and that was it.  So the "proj" command has no code
> to report errors other than by printing "*" after a point transformation.
> cs2cs on the other hand does - partly motifivated by my issuing of
> errors from the datum shifting code that comes into play in cs2cs
> and not in proj.  I would suggest you try with cs2cs.
>
> Best regards,


-- 
Michael Speth
Scientific Programmer
Landcare Research