[GRASS-user] Working with imported kml file

[Stuart Edwards]

> On Feb 14, 2017, at 3:43 AM, Moritz Lennert <mlennert at club.worldonline.be <mailto:mlennert at club.worldonline.be>> wrote:
> 
> On 13/02/17 20:27, Anna Petrášová wrote:
>> On Mon, Feb 13, 2017 at 11:07 AM, Stuart Edwards <sedwards2 at cinci.rr.com <mailto:sedwards2 at cinci.rr.com>> wrote:
>>> 
>>> Anna
>>> 
>>> I now have a working vector file that displays correctly and can be queried with normal results.  However after much trial and error I am still unable to access the elevation data in other modules (e.g. v.to.rast). There is always a requirement to specify the attribute - and as you can see, the geotmetric data are not attributes and do not show up in the menu of attributes. Here's the output from a query that may help visualize the problem:
>>> 
>>> east, north: -79.7630759471, 39.0874586371
>>> DBT at corH:
>>>  Type: Line
>>>  Id: 885
>>>  Length: 275.746
>>>  Line_height: 698.602997
>>>  Layer: 1
>>>  Category: 885
>>>  Driver: sqlite
>>>  Database: /Users/sesMacBook/grassdata/KML/corH/sqlite/sqlite.db
>>>  Table: DBT
>>>  Key_column: cat
>>>  Attributes:
>>>    cat: 885
>>>    cat_: 885
>>>    tessellate: -1
>>>    extrude: -1
>>>    visibility: -1
>>> 
>>> What I need is the Line_height value, which is not an 'attribute' - neither is it 'z'
>>> 
>>> I tried exporting the file as a shape file and reimporting it - same result.  Then as a GRASS ascii - no file created - and ran out of ideas.  Is there a way to add Line_height as an attribute?
>>> 
>>> Any help appreciated...
>> 
>> I would try v.to.db with option start, then v.to.3d
> 
> It would probably be nice, and IMHO not too complicated, to add line height as an option to v.to.db. Stuart, I invite you to post an enhancement request on the trac [1] for that.
> 
> Moritz
> 
> [1] https://trac.osgeo.org/grass/ <https://trac.osgeo.org/grass/>

..... that would be very cool.   Done.

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