[GRASS-user] v.to.rast densify option gives null output

[Markus Metz]

On Fri, Feb 21, 2014 at 10:49 AM, RichardCooper <richtcooper at hotmail.com> wrote:
> Hi,
>
> When I use the -d flag in v.to.rast, cells output are null. Omitting the -d
> flag works fine for rasterization with default thin lines.

The -d option of v.to.rast works only for lines, not for boundaries.
You would need to convert the boundaries to lines and then use
v.to.rast type=line -d.

Markus M

>
> Not sure how to resolve. Is there an alternative GRASS module that can do
> the same?
>
> Cheers,
> Richard
> GRASS GIS 7.0 svn / rev 57721 / python 2.7.3
> Mint Linux / Ubuntu Precise
>
>
> Example of output:
> v.to.rast -d --overwrite input=waterways_finaledit at PERMANENT type=area
> output=waterways_finaledit_vtr_dense use=val value=5
> Pass 1 of 3:
> Reading areas...
> Reading features...
> Writing raster map...
> Pass 2 of 3:
> Reading areas...
> Writing raster map...
> Pass 3 of 3:
> Reading areas...
> Writing raster map...
> Converted areas: 8415 of 13694
> v.to.rast complete.
>
>
> Type of Map:  raster               Number of Categories: 0               |
>  |   Data Type:    CELL
> |
>  |   Rows:         11319
> |
>  |   Columns:      7737
> |
>  |   Total Cells:  87575103
> |
>  |        Projection: UTM (zone 47)
> |
>  |            N:    2379330    S:    1360620   Res:    90
> |
>  |            E:     971010    W:     274680   Res:    90
> |
>  |   Range of data:    min = NULL  max = NULL
> |
>  |
> |
>  |   Data Source:
> |
>  |    Vector Map: waterways_finaledit at PERMANENT
> |
>  |    Original scale from vector map: 1:1
> |
>  |
> |
>  |   Data Description:
> |
>  |    generated by v.to.rast
>
>
>
> --
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