[GRASS-user] Large vector file processing

GRASS GRASS user
1

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 :slight_smile:

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2015-04-24 10:54 GMT+03:00 Margherita Di Leo <diregola@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@assessment…
Registering primitives…
Killed0000

what does this mean?

:~ > v.build vector_tty
WARNING: Coor file of vector map vector_tty@assessment is larger than it
should be (2403996039 bytes excess)
Building topology for vector map vector_tty@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@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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