Re: [OpenMap Users] Newbie questions

The com.bbn.openmap.layer.specialist.MakeProjection object is not
intended to be used like this. You probably don't want to use anything
in the com.bbn.openmap.layer.specialist package, or the
com.bbn.openmap.CSpecialist package. These two packages support the
creation of CORBA client-server layers and plugins.

You should be using the com.bbn.openmap.proj package for creating
Projections, specifically the com.bbn.openmap.proj.ProjectionFactory.

--Don

On Tuesday, August 12, 2003, at 09:15 AM, Benjamin.May@bookspan.com
wrote:

>
> Oops! I was missing the omcorba_vb.jar file from my classpath. Also, it
> seems like openmap was looking for some .shp files in
> $OPENMAP_HOME/data
> when they actually resided in $OPENMAP_HOME/share/data. Ok, so now the
> problem is that I am getting a null pointer on the following line:
>
> com.bbn.openmap.layer.specialist.MakeProjection mp = new
> com.bbn.openmap.layer.specialist.MakeProjection(cp);
>
> The line I used to create the object cp was:
>
> com.bbn.openmap.CSpecialist.CProjection cp = new
> com.bbn.openmap.CSpecialist.CProjection();
>
> And it seems maybe I should be using the other constructor for
> CProjection? CProjection(short kind, LLPoint center, short height,
> short
> width, int scale) ... My only question there is what the heck is
> "kind"?
>
>> -----Original Message-----
>> From: Benjamin.May@bookspan.com [mailto:Benjamin.May@bookspan.com]
>> Sent: Monday, August 11, 2003 5:20 PM
>> To: openmap-users@bbn.com
>> Subject: RE: [OpenMap Users] Newbie questions
>>
>>
>>
>> Hrm, well I tried running my java code on my own PC and this
>> problem went away. But now it's complaining about missing
>> classes. There is a
>>
>> com/bbn/openmap/CSpecialist/
>>
>> Package in the docs which is missing from my distribution!
>> Whats up with that!? Here's my whole class, in case you're interested:
>>
>>
>> import java.util.*;
>> import java.io.*;
>> import com.bbn.openmap.image.*;
>>
>> public class Test{
>>
>> Properties P;
>>
>> public Properties getMapProperties(){
>> if (P == null){
>> try{
>> FileInputStream s = new
>> FileInputStream("openmap.properties");
>> P = new Properties();
>> P.load(s);
>> }catch(Exception e){
>> e.printStackTrace();
>> System.exit(0);
>> }
>> }
>>
>> return P;
>> }
>>
>> public static void main(String argv[]) throws Exception{
>> Test t = new Test();
>> byte [] outfile = t.getMapAsJPEG();
>> FileOutputStream out = new FileOutputStream("test.jpg");
>> out.write(outfile);
>> out.close();
>> }
>>
>> public com.bbn.openmap.proj.Projection getMapProjection(){
>> com.bbn.openmap.CSpecialist.CProjection cp = new
>> com.bbn.openmap.CSpecialist.CProjection();
>> com.bbn.openmap.layer.specialist.MakeProjection mp =
>> new com.bbn.openmap.layer.specialist.MakeProjection(cp);
>> com.bbn.openmap.proj.Projection proj = mp.getProj();
>> return proj;
>>
>> }
>>
>> public byte [] getMapAsJPEG()
>> throws Exception
>> {
>>
>> Properties props = getMapProperties();
>>
>> ImageServer imageServer = new ImageServer("mapDemo", props);
>>
>> com.bbn.openmap.image.SunJPEGFormatter formatter = new
>> com.bbn.openmap.image.SunJPEGFormatter();
>> formatter.setImageQuality(1.0f);
>> imageServer.setFormatter(formatter);
>> byte [] imageBytes =
>> imageServer.createImage(getMapProjection());
>> return imageBytes;
>> }
>>
>> }
>>
>>> -----Original Message-----
>>> From: Adam Russell [mailto:adam.russell@channing.harvard.edu]
>>> Sent: Monday, August 11, 2003 4:45 PM
>>> To: Benjamin.May@bookspan.com; openmap-users@bbn.com
>>> Subject: Re: [OpenMap Users] Newbie questions
>>>
>>>
>>> Ha!! That is a fun one.
>>> This provides some explanation and a possible workaround
>>> http://www.caucho.com/support/resin-interest/0009/0367.html
>>> Basically, java.awt needs to have X around in order to
>> work. It does
>>> this by checking the value of the DISPLAY variable to try and
>>> connect to
>>> a working X server.
>>> There is a couple of workarounds and I think that sun may
>>> have a fix in
>>> the most recent java releases.
>>> I just went with the Xvfb solution(see the above link) and since it
>>> works very well stopped investigating this further.
>>> A google search with keyords like java.awt and Headless will
>>> give you a
>>> lot more info too.
>>>
>>>
>>> Benjamin.May@bookspan.com wrote:
>>>
>>>>
>>>> Hrm, well so far so good. I am able to do some basic stuff.
>>> For now, I
>>>> am just using a default setting Projection. I can worry
>>> about getting
>>>> the position attributes once I am able to just write a file
>>> out at all
>>>> ;) When I try to instantiate the ImageServer as in Keith's
>>> example, I
>>>> get the following exception:
>>>>
>>>> Exception in thread "main" java.lang.InternalError: Can't
>> connect to
>>>> X11 window server using ':0.0' as the value of the
>> DISPLAY variable.
>>>> at
>> sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
>>>> at
>>>>
>>> sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment
>>> .java:54)
>>>> at java.lang.Class.forName0(Native Method)
>>>> at java.lang.Class.forName(Class.java:115)
>>>> at
>>>>
>>> java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Graph
>>> icsEnvironment.java:53)
>>>> at java.awt.Font.initializeFont(Font.java:259)
>>>> at java.awt.Font.<init>(Font.java:293)
>>>> at java.awt.Font.decode(Font.java:773)
>>>> at com.bbn.openmap.layer.LabelLayer.<init>(Unknown Source)
>>>> at com.bbn.openmap.layer.DateLayer.<init>(Unknown Source)
>>>> at java.lang.Class.newInstance0(Native Method)
>>>> at java.lang.Class.newInstance(Class.java:232)
>>>> at
>>> com.bbn.openmap.util.ComponentFactory.create(Unknown Source)
>>>> at
>>> com.bbn.openmap.image.ImageServer.getLayers(Unknown Source)
>>>> at
>>> com.bbn.openmap.image.ImageServer.setProperties(Unknown Source)
>>>> at
>> com.bbn.openmap.image.ImageServer.<init>(Unknown Source)
>>>> at
>> com.bbn.openmap.image.ImageServer.<init>(Unknown Source)
>>>> at Test.getMapAsJPEG(Test.java:47)
>>>> at Test.main(Test.java:27)
>>>> Now, I am trying to save an image without using swing at
>>> all, so I am
>>>> confused why the image manager is trying to act as an XWin
>>> client. Is
>>>> the imagemanager inherently swing-related? If so I should probably
>>>> chose another way to do this. Thanks again guys!
>>>>
>>>> -----Original Message-----
>>>> *From:* Benjamin.May@bookspan.com
>>> [mailto:Benjamin.May@bookspan.com]
>>>> *Sent:* Monday,
>>> August 11, 2003 2:52 PM
>>>> *To:* kalphonso@diamonddata.com
>>>> *Cc:* openmap-users@bbn.com
>>>> *Subject:* RE: [OpenMap Users] Newbie questions
>>>>
>>>>
>>>> This is a good start... What class is that in? You have some
>>>> methods (getMapProperties() for instance) which you
>> dont provide
>>>> here. Are the openmap methods? Where are you passing it the
>>>> co-ordinates so it knows what map to draw? Thanks!
>>>>
>>>> Here is the block of code I use to generate a map
>>> jpeg from a
>>>> set of properties and a map projection.
>>>>
>>>>
>>>> public byte [] getMapAsJPEG(HttpSession session)
>>>> {
>>>> Properties props = getMapProperties();
>>>>
>>>> ImageServer imageServer = new
>>> ImageServer("mapDemo", props);
>>>> com.bbn.openmap.image.SunJPEGFormatter
>> formatter = new
>>>> com.bbn.openmap.image.SunJPEGFormatter();
>>>> formatter.setImageQuality(1.0f);
>>>> imageServer.setFormatter(formatter);
>>>> byte [] imageBytes =
>>>> imageServer.createImage(getMapProjection());
>>>> return imageBytes;
>>>> }
>>>>
>>>
>>>
>> --
>> [To unsubscribe to this list send an email to
>> "majdart@bbn.com" with the following text in the BODY of the
>> message "unsubscribe openmap-users"]
>>
> --
> [To unsubscribe to this list send an email to "majdart@bbn.com"
> with the following text in the BODY of the message "unsubscribe
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>
>

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, BBN Technologies, dietrick@bbn.com
10 Moulton Street, Cambridge, MA 02138
617-873-3031 [fax]-2794
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

--
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