[GRASS-user] multiple

[Frank David]

Hello Maris,

Thanks for your message.

If the lines (road or rivers) makes laces and the transect line cross 
them several times at different distances, only the first intersection 
is reported by v.profil. I have only one CAT by vector lines. You can 
download a data set here > https://we.tl/t-X8GVhWxgW6

The projection is french Lambert93 EPSG 2154. The data comes from IGN 
(French national geographic board)
and you can try this command :

/v.profile input=rivers type="line" buffer=10 profile_map=transect 
profile_where="cat=38"/

On my Grass 7.8.3 (on debian) the command does not return all 
intersection, not even the fisrt one. I don't know why...

Reagrds,
Frank
Le 27/04/2022 à 07:34, Maris Nartiss a écrit :
> Hello Frank,
> Could you elaborate on „first item“ as I just digitized a vector map
> with three lines and crossed them with a profile and got back three
> distances.
> Things to check – do all lines have a CAT value in specified layer?
> If you have a problem with a specific data set, you can send me it
> off-list so I can take a look.
>
> Māris.
>
> otrd., 2022. g. 26. apr., plkst. 21:08 — lietotājs Frank David
> (<frank.david at geophom.fr>) rakstīja:
>> Hello,
>>
>> I need to identify vector lines (like roads, rivers) crossed by a
>> transect and get distance from the beginning of the transect. For the
>> moment I'm using v.profile but it returns only the first item. Is there
>> any way to get all crossed lines ?
>>
>> Thank for your help,
>>
>> Frank
>>
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