<div dir="ltr">Does this helps you?<br>v.category input=map_of_vedit output=map2 option=add layer=2 <br><div>v.db.addtable map=map2 layer=2 table=table2<br></div><div><br></div><div>In that way you preserve original information in layer1, and new categories in layer2<br><br></div><div>Hopefully that will be useful. Maybe someone has a better idea.<br><br></div><div>Daniel<br></div><div><br><br><br></div><div><br><br>>Dear list<br>
<br>>I break a number of features in a vector map into two pieces using<br>
>v.edit, tool=break and specific coordinates. This results in two parts<br>>with identical attributes after breaking (which is what I want) but also<br>
>the cat is identical.<br>
>I think, this is the reason why I get exactly the same length for the<br>
>two parts when calculating it using v.to.db, tool=length. Likewise, the<br>
>end coordinates cannot be computed as there is more than one element for<br>
>some categories.<br>
<br>
>How can I update the category to unique values for each feature?<br>
<br>
>Thanks for any suggestions,<br>
>Mira<br>
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