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Chaitanya,<br>
<br>
thanks for this prompt response! We will do as you describe. Before,
we'd need your assistance: the rasdaman driver should be compiled in
only if it's found, and we are not sure whether our way of doing so is
the canonical one. Constantin will describe this soon in a separate
mail.<br>
<br>
-Peter<br>
<br>
<br>
<br>
On 08/03/2010 07:10 AM, Chaitanya kumar CH wrote:
<blockquote
cite="mid:AANLkTin1tN4xfnV_Nj6vBXUN4rfjrt-hUNCF03ZVf2hY@mail.gmail.com"
type="cite">Peter,<br>
<br>
Please create a new ticket at <a moz-do-not-send="true"
href="http://trac.osgeo.org/gdal/newticket">http://trac.osgeo.org/gdal/newticket</a>
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<br>
<br>
<div class="gmail_quote">On Tue, Aug 3, 2010 at 12:20 AM, Peter
Baumann <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:p.baumann@jacobs-university.de">p.baumann@jacobs-university.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Dear
GDAL maintainers,<br>
<br>
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.<br>
<br>
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 <a moz-do-not-send="true"
href="http://www.rasdaman.org" target="_blank">www.rasdaman.org</a>
for the open-source code, documentation, etc. Currently rasdaman is
under consideration for OSGeo incubation.<br>
<br>
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].<br>
<br>
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.<br>
<br>
We hope that this contribution is of value to the community, any
comments are highly appreciated.<br>
<br>
Thanks in advance for your assistance,<br>
Peter & Constantin<br>
<br>
<br>
[1] The connect string syntax follows the WKT Raster pattern and goes
like this:<br>
rasdaman:<br>
query='select a[$x_lo:$x_hi,$y_lo:$y_hi] from MyImages as a'<br>
tileXSize=512 tileYSize=512<br>
[host='localhost'] [port=7001] [database='RASBASE']<br>
[user='rasguest'] [password='rasguest']<br>
<br>
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.<br>
<br>
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:<br>
query='select ( a.red+a.nir ) /2 [$x_lo:$x_hi,$y_lo:$y_hi, 0 ]
from SatStack as a'<br>
<br>
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.<br>
<br>
As rasdaman supports concurrent access with parallel query evaluation,
any number of such connections can be opened.<br>
<br>
-- <br>
Dr. Peter Baumann<br>
- Professor of Computer Science, Jacobs University Bremen<br>
<a moz-do-not-send="true"
href="http://www.faculty.jacobs-university.de/pbaumann" target="_blank">www.faculty.jacobs-university.de/pbaumann</a><br>
mail: <a moz-do-not-send="true"
href="mailto:p.baumann@jacobs-university.de" target="_blank">p.baumann@jacobs-university.de</a><br>
tel: +49-421-200-3178, fax: +49-421-200-493178<br>
- Executive Director, rasdaman GmbH Bremen (HRB 147737)<br>
<a moz-do-not-send="true" href="http://www.rasdaman.com"
target="_blank">www.rasdaman.com</a>, mail: <a moz-do-not-send="true"
href="mailto:baumann@rasdaman.com" target="_blank">baumann@rasdaman.com</a><br>
tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882<br>
"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)<br>
<br>
<br>
<br>
_______________________________________________<br>
gdal-dev mailing list<br>
<a moz-do-not-send="true" href="mailto:gdal-dev@lists.osgeo.org"
target="_blank">gdal-dev@lists.osgeo.org</a><br>
<a moz-do-not-send="true"
href="http://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_blank">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br>
</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
Best regards,<br>
Chaitanya kumar CH.<br>
/tʃaɪθənjə/ /kʊmɑr/ <br>
+91-9494447584<br>
17.2416N 80.1426E<br>
</blockquote>
<br>
<pre class="moz-signature" cols="80">--
Dr. Peter Baumann
- Professor of Computer Science, Jacobs University Bremen
<a class="moz-txt-link-abbreviated" href="http://www.faculty.jacobs-university.de/pbaumann">www.faculty.jacobs-university.de/pbaumann</a>
mail: <a class="moz-txt-link-abbreviated" href="mailto:p.baumann@jacobs-university.de">p.baumann@jacobs-university.de</a>
tel: +49-421-200-3178, fax: +49-421-200-493178
- Executive Director, rasdaman GmbH Bremen (HRB 147737)
<a class="moz-txt-link-abbreviated" href="http://www.rasdaman.com">www.rasdaman.com</a>, mail: <a class="moz-txt-link-abbreviated" href="mailto:baumann@rasdaman.com">baumann@rasdaman.com</a>
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)
</pre>
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