[GRASS-user] Large vector file processing

[Alexander Muriy]

Hello, Margherita! I don't know about limitations of raster or memory sizes
in GRASS, but the first thought was to cut raster into parts, vectorize
them and then patch into new vector map. Of course, with automatic cutting,
not manual :)


2015-04-24 10:54 GMT+03:00 Margherita Di Leo <diregola at gmail.com>:

> Hi,
>
> I'm trying to vectorize a very large file
>
>  |   Type of Map:  raster               Number of Categories: 255
>     |
>  |   Data Type:    CELL
>     |
>  |   Rows:         88537
>    |
>  |   Columns:      54410
>    |
>  |   Total Cells:  4817298170
>     |
>  |        Projection: Lambert Azimuthal Equal Area
>    |
>  |            N:    4239550    S:    2026125   Res:    25
>     |
>  |            E:    4284650    W:    2924400   Res:    25
>     |
>  |   Range of data:    min = 11  max = 255
>
> using GRASS 7.1.svn (r65027)
>
> :~ > r.to.vect input=raster_tty output=vector_tty type=area
> Extracting areas...
>  100%
> Writing areas...
>  100%
> Building topology for vector map <vector_tty at assessment>...
> Registering primitives...
> Killed0000
>
> what does this mean?
>
> :~ > v.build vector_tty
> WARNING: Coor file of vector map <vector_tty at assessment> is larger than it
>          should be (2403996039 bytes excess)
> Building topology for vector map <vector_tty at assessment>...
> Registering primitives...
> Killed0000
>
> Question about "larger that it should be": What is this limitation? I
> guess is related to the specs of my laptop?
>
> Thanks,
> --
> Best regards,
>
> Dr. Margherita DI LEO
> Scientific / technical project officer
>
> European Commission - DG JRC
> Institute for Environment and Sustainability (IES)
> Via Fermi, 2749
> I-21027 Ispra (VA) - Italy - TP 261
>
> Tel. +39 0332 78 3600
> margherita.di-leo at jrc.ec.europa.eu
>
> Disclaimer: The views expressed are purely those of the writer and may not
> in any circumstance be regarded as stating an official position of the
> European Commission.
>
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