Greetings
I have one question regarding i.rectify's data type output: If I have my input is a CELL map, will my output will be also CELL? I mean, does it keep my data type?
Thanks
Antonio
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2011/7/21 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
I have one question regarding i.rectify's data type output: If I have my
input is a CELL map, will my output will be also CELL? I mean, does it keep
my data type?
That depends on the resampling method. Only nearest neighbor preserves
the datatype, with all other resampling methods the output will be
DCELL. This is similar to r.proj, only that r.proj uses FCELL for
resampling methods other than nearest neighbor.
Hello Markus
Are you sure? Because I have tried i.rectify (1st order, 2nd order and 3rd Order) with a CELL image and my output was also CELL.
Markus Metz wrote:
2011/7/21 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
I have one question regarding i.rectify's data type output: If I have my
input is a CELL map, will my output will be also CELL? I mean, does it keep
my data type?
That depends on the resampling method. Only nearest neighbor preserves
the datatype, with all other resampling methods the output will be
DCELL. This is similar to r.proj, only that r.proj uses FCELL for
resampling methods other than nearest neighbor.__________ Information from ESET NOD32 Antivirus, version of virus signature database 6314 (20110721) __________
The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6314 (20110721) __________
The message was checked by ESET NOD32 Antivirus.
António Rocha:
Hello Markus
Are you sure? Because I have tried i.rectify (1st order, 2nd order and 3rd
Order) with a CELL image and my output was also CELL.
Yes. The order (1st, 2nd, or 3rd) affects only coordinate
transformation. The resampling method determines how the new cell
value is calculated. This is the difference between the option order
and the option method. BTW, the option method has been introduced only
relatively recently, i.e. is not available in 6.4.1, I think, only
6.4.2.
Markus Metz wrote:
2011/7/21 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
I have one question regarding i.rectify's data type output: If I have my
input is a CELL map, will my output will be also CELL? I mean, does it
keep
my data type?That depends on the resampling method. Only nearest neighbor preserves
the datatype, with all other resampling methods the output will be
DCELL. This is similar to r.proj, only that r.proj uses FCELL for
resampling methods other than nearest neighbor.__________ Information from ESET NOD32 Antivirus, version of virus
signature database 6314 (20110721) __________The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 6314 (20110721) __________The message was checked by ESET NOD32 Antivirus.