[gdal-dev] new GDAL driver: how to proceed?

[Chaitanya kumar CH]

Peter,

Please create a new ticket at http://trac.osgeo.org/gdal/newticket and
attach your code. If all goes smoothly, it will be added into the 1.8 branch
of GDAL and released with GDAL-1.8.0

On Tue, Aug 3, 2010 at 12:20 AM, Peter Baumann <
p.baumann at jacobs-university.de> wrote:

> Dear GDAL maintainers,
>
> we have written a GDAL driver to add the rasdaman database as another "data
> format" that GDAL can read, and we would like to contribute this to the GDAL
> project.
>
> Rasdaman is a raster database middleware offering an SQL-style query
> language on multi-dimensional arrays of unlimited size, stored in a
> relational database. See www.rasdaman.org for the open-source code,
> documentation, etc. Currently rasdaman is under consideration for OSGeo
> incubation.
>
> In our driver implementation, GDAL connects to rasdaman by defining a query
> template which is instantiated with the concrete subsetting box upon every
> access. This allows to deliver 2-D cutouts from n-D data sets (such as
> hyperspectral satellite time series, multi-variable climate simulation data,
> ocean model data, etc.). In particular, virtual imagery can be offered which
> is derived on demand from ground truth data. Some more technical details are
> given below [1].
>
> The code compiles smoothly with the latest GDAL code and is undergoing
> final tests and documentation. For a clean integration with the GDAL code
> base we are asking for further advice. In particular, our Makefile structure
> needs some fine tuning, we need to know intended use of some parameters.
>
> We hope that this contribution is of value to the community, any comments
> are highly appreciated.
>
> Thanks in advance for your assistance,
> Peter & Constantin
>
>
> [1] The connect string syntax follows the WKT Raster pattern and goes like
> this:
>    rasdaman:
>        query='select a[$x_lo:$x_hi,$y_lo:$y_hi] from MyImages as a'
>        tileXSize=512 tileYSize=512
>        [host='localhost'] [port=7001] [database='RASBASE']
>        [user='rasguest'] [password='rasguest']
>
> The rasdaman query language (rasql) string in this case only performs
> subsetting. Upon image access by GDAL, the $ parameters are substituted by
> the concrete bounding box computed from the input tile coordinates.
>
> However, the query provided can include any kind of processing, as long as
> it returns something 2-D. For example, this determines the average of red
> and near-infrared pixels from the oldest image time series:
>        query='select ( a.red+a.nir ) /2 [$x_lo:$x_hi,$y_lo:$y_hi, 0 ] from
> SatStack as a'
>
> The further key-value pair parameters in brackets are optional, their
> defaults are listed. BTW, the default user has read-only access to the
> database as per rasdaman convention.
>
> As rasdaman supports concurrent access with parallel query evaluation, any
> number of such connections can be opened.
>
> --
> Dr. Peter Baumann
>  - Professor of Computer Science, Jacobs University Bremen
>   www.faculty.jacobs-university.de/pbaumann
>   mail: p.baumann at jacobs-university.de
>   tel: +49-421-200-3178, fax: +49-421-200-493178
>  - Executive Director, rasdaman GmbH Bremen (HRB 147737)
>   www.rasdaman.com, mail: baumann at rasdaman.com
>   tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
> "Si forte in alienas manus oberraverit hec peregrina epistola incertis
> ventis dimissa, sed Deo commendata, precamur ut ei reddatur cui soli
> destinata, nec preripiat quisquam non sibi parata." (mail disclaimer, AD
> 10xx)
>
>
>
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>



-- 
Best regards,
Chaitanya kumar CH.
/tʃaɪθənjə/ /kʊmɑr/
+91-9494447584
17.2416N 80.1426E
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