[GRASSLIST:8024] Re: ascii vector line format question

[Maciek Sieczka]

From: "Radim Blazek" <radim.blazek at gmail.com>

> On 8/19/05, Maciek Sieczka <werchowyna at epf.pl> wrote:
>> Dear All,
>>
>> Is it a 100% rule, that the line ending is *always* indicated by "1"?
>>
>> Say like here:
>>
>> L  12 1
>>  597230.44979275 5681618.56747334
>>  597235.81795873 5681608.14691583
>>  597241.81767366 5681596.14748598
>>  1     2
>>
>> I have written a simple awk script for exporting Grass vector into a
>> Surfer
>> "blanking file", "BLN" ascii format, which is e.g. used for defining
>> elevation faults for interpolation in Surfer. I would like to share it on
>> a
>> WIKI, but first I need to make sure if the awk search formula I use:
>>
>> ( (NR > 10) && ($1 == "L") ) {print $2",0"}
>> ( (NR > 10) && ($1 != "L") && ($1 !=1) ) {print $1","$2}
>>
>> is 100% compatible with any possible Grass ascii line vector file.
>>
>> Maciek

> No, it depends on number of layers and categories specified as second
> number after L, here are some examples:
> L  2 0
> 597230.44979275 5681618.56747334
> 597235.81795873 5681608.14691583
> L  2
> 597230.44979275 5681618.56747334
> 597235.81795873 5681608.14691583
> L  2 1
> 597230.44979275 5681618.56747334
> 597235.81795873 5681608.14691583
> 1     2
> L  2 2
> 597230.44979275 5681618.56747334
> 597235.81795873 5681608.14691583
> 1     2
> 1     3
> L  2 3
> 597230.44979275 5681618.56747334
> 597235.81795873 5681608.14691583
> 1     2
> 1     3
> 2    123

Radim,

Thanks for clearing this out to me. Bad thing I don't know how to cope with 
many layers. I hope some awk Whizz can suggest right approach. As for now 
I'm at
least happy my first awk script can handle one layer line vector :), but 
that might be usefull only for me :( .

Maciek