[GRASS-user] Line_Height to db attribute

[Anna Petrášová]

On Wed, Apr 8, 2015 at 6:56 PM, Nick Cahill <ndcahill at wisc.edu> wrote:

> I have a series of vector contour maps imported from CAD files. The CAD
> lines were digitized in 3d so the lines were set at the proper height, and
> I imported them with v.in.dxf. The z values now come in as Line_height
> values:
>
> east, north: 586205.150707, 4261840.15315
> map28 at PERMANENT:
>   Type: Line
>   Id: 120
>   Length: 1005.435416
>   Line_height: 160.0
>   Layer: 1
>   Category: 120
>   Driver: sqlite
>   Database: /Users/nick/Documents/Grass/sardis/PERMANENT/dbf/sardisutm.rsd
>   Table: map28_con10
>   Key_column: cat
>   Attributes:
>     cat: 120
>     layer: CON10
>     entity: LWPOLYLINE
>     handle: 3E1
>
>
>
> I’m sure there’s an easy way to get those Line_Height values into proper z
> coordinates, but I cannot figure out how to do it. Any help would be
> greatly appreciated!
>

Why do you think the vector doesn't have proper z coordinates? Line_height
160 means that the vector feature actually has z coordinates, otherwise it
wouldn't show Line_height item at all. If you want to display it in 3D
mode, there is an option to switch between draping on surface and
displaying it as truly 3D

Anna


>
> Many thanks,
>
> Nick Cahill
>
>
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