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<p class=MsoNormal><span style='color:#1F497D'>SDO_DIMINFO in the SDO_GEOM_METADATA_TABLE
(which has a bunch of user, etc aliases) stores the extents of each layer.
However, this isn’t guaranteed to be the data extents in real-world
situations.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>SDO_INDEX_METADATA_TABLE appears
to store information about the MBR, but I’m not sure how to decode it. None of
the entries in my database contain usable values in SDO_*_EXTENTS fields or in
the SDO_ROOT_MBR field (that I can tell). Do you have to read the value of the
SDO_NL_INDEX_TABLE, and then pull the value from that?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Jason<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Orest
Halustchak<br>
<b>Sent:</b> Monday, November 17, 2008 14:45<br>
<b>To:</b> 'fdo-internals@lists.osgeo.org'<br>
<b>Subject:</b> Re: [fdo-internals] RE: FDO Function SpatialExtents<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Oracle saves the root mbr in one of the metadata tables. I don't
have access at the moment to check.<br>
<br>
Orest.<br>
<br>
-------------------------- <br>
Sent from my BlackBerry Wireless Handheld </span><span lang=EN-US><o:p></o:p></span></p>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>: fdo-internals-bounces@lists.osgeo.org <br>
<b>To</b>: FDO Internals Mail List <br>
<b>Sent</b>: Mon Nov 17 14:54:09 2008<br>
<b>Subject</b>: RE: [fdo-internals] RE: FDO Function SpatialExtents </span><span
lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Can you help me
little more, how to get it from R-TREE ?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I know of
SDO_TUNE.Extent_OF which is faster for some types of data.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>BTW, so far I tested
, Map calls it twice, once together with Count, second time only
SpatialExtents.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Haris<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Orest
Halustchak<br>
<b>Sent:</b> Monday, November 17, 2008 11:22 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> [fdo-internals] RE: FDO Function SpatialExtents<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Hi Haris,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Map3D asks for the
spatial extents first before fetching any of the geometry. The spatial extents
will define the extents of the window. The spatial extents function needs to be
very quick in this case. For Oracle, you could get it from the r-tree.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Orest.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Haris
Kurtagic<br>
<b>Sent:</b> Monday, November 17, 2008 5:36 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> [fdo-internals] FDO Function SpatialExtents<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I have implemented support for
SelectAggregates in King.Oracle.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I am testing SpatialExtent function and I
need help in understanding how clients, MAP 3D , is using it. I am not sure if
I understand how is it supposed to be used.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I have implemented function using Oracle
SDO_AGGR_MBR. That is rather slow process .<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>What I noticed is that MAP 3D 2009 is
calling FDO command SelectAggregates with SpatialExtents function.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>That makes rendering of layers very slow in
MAP 3D.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I know I am asking about non-open source
client like MAP 3D but from what I see makes me wonder if I understand
SpatialExtents function correctly.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thank you,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Haris<o:p></o:p></span></p>
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