Erwan,
This sounds pretty nifty. This would tie in nicely to JUMP's DataStore
framework (which handles streaming data from a remote store and caching
it for viewing and manipulation purposes). It should be easy to develop
DataStore drivers for GDBMS data sources.
Hopefully someone will get interested in this and take this on.
Martin
erwan bocher wrote:
Dears,
We are working on a new GDBMS version named GDMS (look at
http://geosysin.iict.ch/irstv-trac/wiki/GDBMS/Project). This
development is supported by IRSTV institute. We are 3 only on GDMS.
Currently, GDMS is used by OrbisGIS a new GIS approach based on
geotools (http://geosysin.iict.ch/irstv-trac/wiki/OrbisGIS/Videos).
Few months ago, I proposed a plan to improve the memory limits in
OpenJUMP using GDMS but without any sucess ;-).
GDMS contains a SQL engine and the data is never load in memory. It
will be a great improvement if OJ uses it.
GDMS is very easy to use. Look the example below :
//Open a shape file
File src1 = new File( "../hedgerow.shp");
DataSourceFactory dsf = new DataSourceFactory();
DataSource ds = null ; // We use a datasource. Because it can be
alphanumeric or spatial.
SpatialDataSourceDecorator sds = null ;
ds = dsf .getDataSource(src1);
sds = new SpatialDataSourceDecorator(ds); // To obtain a spatial
object
//To query the data
dsf.executeSQL("select Buffer(the_geom, 20) from "+ ds.getName) // It
returns a new datasource
Easy no ?
Currently we have :
- H2 spatial driver,
- DBF,
-CSV,
- shapefile,
- cir (3D format)
Feel free if OJ community is interested.
R1.
2007/8/19, Stefan Steiniger <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>:
Hei Peppe,
i somehow try to follow the GDBMS development by Erwans Teams as it
seems very useful together with H2 spatial to obtain memory-idenpence
from file sizes for OJ/JUMP. The problem is simply, that a) we do not
know how reliable t works currenly, b) that i am not familar with
databases and c) we lack resources for an adaptation.
but maybe...
stefan
Giuseppe Aruta schrieb:
> Hi all,
> does somebody explore the possibility to add GDBMS
> (http://gdbms.sourceforge.net/) drivers to OJ?
> GDBMS and related GDBMS gvSIG plugins add support for
> many file formats: shapefiles, dgn, dwg (OpenDWG
> spec.), etc
> Some JAVA software like Orbiscad and GvSIG use these
> drivers.
> I am interested abouit DWG and I did some test:
> Orbiscad reads DWG but it is very slow and has no
> support for text and layer colours
> GvSIG opens DWG quite well, it is fast and reads text
> and colours.
>
> Regards
>
> Peppe
>
>
>
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Docteur en géographie,
spécialité géomatique
École Centrale de Nantes
Institut de recherche en sciences et techniques de la ville
http://www.irstv.cnrs.fr/
http://geosysin.iict.ch/irstv-trac/wiki
http://r1.bocher.free.fr <http://r1.bocher.free.fr>
http://www.projet-sigle.org
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