Help with displaying spatial data

Hi, i am new to spatial and have a table (temp_properties) that has numerous columns, one of which is called shape and is of mdsys.sdo_geometry type.
I also have a table in another database that also has a shape column the same, we cannot seem to use the shape column across the database link as we keep getting 'remote operations not permitted on object tables or user-defined type columns'
is this a known limitation or is it just the way i am trying to do it?
We would also like to be able to retrieve the coordinates in sql from this shape column, but keep getting errors.

Hi,
before just one question : have you an column wich is called
se_anno_cad_data in your table with the shape field.
Spatial Operator :
For example if you have polygone in your shape field
you can obtain the centroid of the polygone by this
query:
select c.code_topo, c.centroid.sdo_point.x as X, c.centroid.sdo_point.y as Y
from (select e.code_topo, sdo_geom.sdo_centroid(sdo_geom.sdo_convexhull(e.geom, 0.05), 0.05) as CENTROID
from expl_local e) c
with expl_local : my table with the sdo_geometry type field and geom the name of the sdo_geometry field
sdo_geom.sdo_centroid and sdo_geom.sdo_convexhull are
spatial operator from Oracle Spatial Option.
nice to read you
Pascal

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Awww, its nice that DB has someone to comeback and carry on a discussion.....long after its over.
The problem here seems to be your lack of understanding between what a teacher or what an 'instructor' is.
From the way you speak, an instructor appears to be someone who is technically skilled in both coding and teaching Java as a programming language, designed for people who wish to code in Java.
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The computing course i am currently teaching does not require OOP, but as Java is the language i was taught at University, and is still often used in our University's, I chose it. I don't pretend to be the best programmer in the world. But I do know that I am teaching the pupils the correct basics, at a higher level than is probably required, to give them the right approach at university. also, this is whilst teaching a large amount of theory.
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The code posted in the OP (as stated earlier) had nothing to do with displaying my coding abilities, nor did it display the technique's I use when teaching students. It was a small sample of a program which included a JList which was not displaying properly. I tried to include the whole code but it was too big, therefore it was cut down.
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At the end of the day, each to his/her own opinion. What I will say is that when someone requests help, positive feedback/criticism is well recieved along with instructions/guidance on how the problem can be solved. I feel that I received none of this on here, but this is what I will always provide to the students I teach.
Not everyone is a full-time Java programmer or has the time to hit the highest expectations.

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If you have to use the following code to fix the encoding:
String value = new String(item.getString().getBytes("ISO-8859-1"), "UTF-8"); ...
then you are just putting a band aid on something that is broken somewhere else (since this code creates a byte array in 8859-1 and then creates a string from that byte array, but assuming that the array is encoded in UTF-8). That will only work if the string you start out with is mangled.
In many cases such a fix will actually "work" (in the sense that you may end up with something that is correctly encoded in the end), but you run the risk of breaking if the source of the original corruption is removed.

Help with displaying a tree...

Hello,
I created a window program that displays some data in a tree structure. I have two versions of the program. One that works and one that doesn't. The one that does, builds the tree in the constructor method of my window class, creates a scrollPane for it, and adds the scrollPane to the window. Again, this version displays the tree fine.
The second version, what I want to accomplish is load the tree when a button is pressed. When the button is pressed, I execute exactly the same steps that I do in the constructor but now these steps are in the actionPerformed method associated to the button. The thing is that the program does not display the tree. I have tried the repaint methods at the contentPane level, at the tree level, reloading the treeModel, but cannot get the tree to show. I would very appreciate any ideas on this...
Thanks
Antonio

Hey...
Thanks for the tip...that did the trick. What does the validate() method do exactly? The documentation doesn't say much....Thanks again...
Antonio

Help with displaying Date from Unix seconds

My program receives seconds taken from a Unix system and must display them on my GUI. I realize I have to convert seconds to milliseconds for the Date, plus I take into consideration the timezone.
My problem is that everything works correctly for time zones from GMT -1:00 all the way to GMT -12:00, but GMT time and all the zones between GMT +1:00 to GMT +12:00 display the wrong time. It varies how many hours off it is.
Does anyone have any suggestions? I have been searching for similar issues.
here is my code:
static public String SecToTimeOfDay(long sec)
   SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
   long timeZone = java.util.TimeZone.getDefault().getRawOffset();
   int milli = 1000;
   String date;
   if (timeZone < 0)
      timeZone = timeZone * -1;
   //convert to seconds to milliseconds
   date = dateFormat.format(new java.util.Date((sec * milli) + timeZone));
   return date;
}

That is not the right way to handle time zones. Try the following and see if you're still having problems.
static public String SecToTimeOfDay(long sec){
    SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
    dateFormat.setTimeZone(java.util.TimeZone.getDefault());
    int milli = 1000;
    date = dateFormat.format(new java.util.Date(sec * milli));
    return date;
}

Problems with displaying read data from a .lvm file

Hi all.
I aquire data with the PCMCIA card 6036E. I aquire online in Labview 7 and store the data in a .lvm file. When i try to display the same data i aquired before with the "read .lvm file" express vi, the waveform chart redraws itself after an undefined time, sometimes it redraws faster and sometimes it takes longer. WHY? i have only one header per aquisition and if i restart the aquisition a new file is written! I tried almost everything. Is this a bug from labview 7?
I really appreciate your help.
best regards,
Bernd

Hi Khalid,
Here is a simplified version of my VI and also 2 .lvm files from the logged data. Sorry for the size, but I aquire with a sample rate of 20 kS/s and my main frequency is only 0.3 Hz. In the 6MB file I aquired a little more than 3 periods. When you run the VI with this file at the beginning it redraws very often and very fast, then after some time it draws about 1 period and then it redraws again and so on. I want that the hole data from this file is displayed at once. The 900kB file is aquired with 10kS/s and about 1.5 periods. This is the last size the displaying is working with. You think it is possible that the VI only works until 1MB? But my data usually is much bigger than that. I hope you can use the data because it is
zipped, but otherwise it wouldnt be possible to post it.
Thank you very much for your help, I really appreciate it!
Best regards,
Bernd
Attachments:
simplified_VI_for_offline_data_display.vi ‏79 KB
2004-07-01_Messung9.zip ‏191 KB
2004-07-01_Messung4.zip ‏680 KB

Help with displaying spatial data

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