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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | [gislist] rasters in SDE |
| Date: |
09/23/2003 02:10:01 PM |
| From: |
Analisa Gunnell |
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Greetings List,=20
=20
I am beginning to trudge through the unfamiliar world of the SDE =
database (not to mention rasters) that ESRI has been raging about. We =
have spent some time importing and mosaicing dems for Washington and =
Oregon. The finished version looks wonderful, and loads in seconds, but =
the problem is that I would like to actually take pieces out (I.e. =
"Clip") for particular map projects that I am working on. I had =
believed that one of the selling points of SDE was not just its =
multi-user editing environment, but also, the ability to quickly clip =
out portions of grids/rasters that you need. After doing a bit more =
investigative research, however, it appears that I have to go through =
the SDERASTER -o EXPORT command line to achieve anything close to a =
'clip'. This, finally leads me to my question. the help documentation =
lists the usage of the command line syntax as so:
=20
ArcSDE 8.2
Raster Utility
-------------------------------------------------------------
Usage: sderaster -o export -l <table,column> -v <raster_id>
-f <image_file> [-I]
[{-w | -e} <minx,miny,maxx,maxy>]
[-b <band_number>]
[-L <pyramid_level>]
[-i <service> | <port#>]
[-s <server_name>]
[-D <database>]
[-u <DB_user_name>]
[-p <password>]
=20
-w Extraction window in pixel coordinates.
-e Extraction window in world coordinates.
-I Inverts bilevel images.
=20
the commandline that I am using is:
=20
H:sdein>sderaster -o export -l forest.sde_andrew.Multistate,image -v =
4 -
f forest -e 518591.459506,5305535.92857, 695353.879042, 5432577.33379 -b =
1
-l -1 -s <server_name> -D <database> -u <DB_user_name> -p <password> -i =
5151
=20
As far as I can tell, where I am running into problems is with my =
coordinates. I created a clipping box shapefile over the area on the =
grid that I wanted to export. I did this believing that I could find =
the x.y coordinates and extract only that area. It seems, however, that =
I am supposed to find either the "pixel coordinates" or the "world =
coordinates". I have a feeling that I am missing a very basic fact =
about what this "extract" command is actually doing. I am in no way =
confident in the realm of grids or SDE so, if anyone could help me on =
this question, it would be GREATLY appreciated. =20
=20
=20
Thanks so much in advance!!!
=20
Analisa=20
=20
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