[GRASS-user] i.rectify - how long is too long

[G. Allegri]

Very strange... I have a Dual Core 2.8Ghz, 2 Gb RAM laptop and jsut
today I've run i.rectify for a raster with similar dimensions of
yours, 35 GCPs and 2nd order: 15/20 seconds to process it.
GRASS 6.2.3

Giovanni

2008/1/19, Luis E Menoyo <lemenoyo at usgs.gov>:
>
> I'm using 1st order and 13 GCPs on an image and i.rectify has been running
> over 3 hours.  Is the process locking up or is this amount of time normal in
> image rectification?  Is i.rectify processing just the area of the image to
> be rectified, of is it calculating for the whole target mapset area?  In
> other words, should I have applied a mask to the target mapset before
> running the georectify tool in order to cut down on processing time?
>
> Any info would be greatly appreciated.
> Thanks!
>
> Image info:
>
> +----------------------------------------------------------------------------+
>  | Layer:    D-10 at PERMANENT                 Date: Fri Jan 18 08:17:14 2008
>  |
>  | Mapset:   PERMANENT                      Login of Creator: me        |
>  | Location: x-y
>  |
>  | DataBase: /gis/oahu_flightlines                     |
>  | Title:     ( D-10 )
>  |
>  | Timestamp: none
>  |
> |----------------------------------------------------------------------------|
>  |
>  |
>  |   Type of Map:  raster               Number of Categories: 255
>  |
>  |   Data Type:    CELL
>  |
>  |   Rows:         4171
>  |
>  |   Columns:      3280
>  |
>  |   Total Cells:  13680880
>  |
>  |        Projection: x,y
>  |
>  |            N:       4171    S:          0   Res:     1
>  |
>  |            E:       3280    W:          0   Res:     1
>  |
>  |   Range of data:    min = 0  max = 255
>  |
>  |
>  |
>  |   Data Description:
>  |
>  |    generated by r.in.gdal
>  |
>  |
>  |
>  |   Comments:
>  |
>  |    r.in.gdal input="/gis/oahu_flightlines/D/D-10\   |
>  |    .jpg" output="D-10"
>  |
>  |
>  |
> +----------------------------------------------------------------------------+
>
> Computer:
>
> Mac Pro 2.66GHz, 2 dualcore Intel Xeon (4 cores total), 4Gb RAM
>
> GRASS:
>
> GRASS 6.3.0RC4 (2008)
>
>
>
> Luis E. Menoyo
>  U.S. Geological Survey
>  677 Ala Moana Blvd., Suite 415
>  Honolulu, HI  96813
>  lemenoyo at usgs.gov
>  808-587-2428
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