[mapguide-users] can anyone solved this buffer problem

Kenneth Skovhede, GEOGRAF A/S ks at geograf.dk
Wed May 6 05:38:27 EDT 2009


I don't have code to send, I just gave you a general approach.

If you manage to produce the code based on the general idea,
it would be nice if you share it here:
http://trac.osgeo.org/mapguide/wiki/CodeSamples

Regards, Kenneth Skovhede, GEOGRAF A/S



padmini godavarthi skrev:
> Hi Kenneth,
> Thanks for ur help.
> if u dont mind can u plz send me the code for retrieving features with in
> the buffer area....................
>
> Thanks in advance...
>
> Regards,
> Padmini.
>
>
>
> Kenneth Skovhede, GEOGRAF A/S wrote:
>   
>> My method would be to retrieve the WKT of  the buffer object,
>> then iterate all the layers, and for each layer execute a query with the 
>> filter set to:
>> "<geometry column name> INTERSECTS GEOMFROMTEXT('...wkt...')"
>> You should then get all objects that are within the buffer zone.
>>
>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>
>>
>>
>> padmini godavarthi skrev:
>>     
>>> Hi,
>>> Thanks for ur  reply
>>>
>>> 1)can u plz tell me how to retrieve features with in the buffer
>>> area(actually im a little bit confused)
>>>
>>>
>>> Regards,
>>> Padmini.
>>>
>>>
>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>   
>>>       
>>>> It looks correct, it seems to follow the edges as expected.
>>>>
>>>> When creating the buffer, a simple method is to take each line, and 
>>>> buffer it,
>>>> so it gets rounded corners.
>>>> Then alle the resulting buffer items are combined into a single object 
>>>> that is the buffer.
>>>>
>>>> If I look at your image, that seems to happen correctly.
>>>> The long side at the bottom right seems to be reflected in the buffer
>>>> edge.
>>>>
>>>> If you would like it to be a perfect circle, you should only buffer a
>>>> point,
>>>> not a polygon.
>>>>
>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>
>>>>
>>>>
>>>> padmini godavarthi skrev:
>>>>     
>>>>         
>>>>> Hi Kenneth,
>>>>>
>>>>>   i have created a buffer with 0.2 miles but i think the buffer is not
>>>>> creating accurately 
>>>>>
>>>>>      http://n2.nabble.com/file/n2745746/buffer.jpeg 
>>>>>
>>>>> 1) can u provide any solution?????????????
>>>>>
>>>>> 2)And can u plz tell me the code for retrieving parcel_id with in the
>>>>> buffer
>>>>> area(im a little bit confused)
>>>>>
>>>>> plzzzzzzzz
>>>>>
>>>>> Regards,
>>>>> Padmini.
>>>>>
>>>>>
>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>   
>>>>>       
>>>>>           
>>>>>> It looks correct to me. Try using a smaller buffer to better determine 
>>>>>> accuracy.
>>>>>>
>>>>>> For the second question, you have already asked that in another
>>>>>> thread.
>>>>>> The AJAX viewer shows selection data, so try looking at the 
>>>>>> selection.aspx files,
>>>>>> and see how it works.
>>>>>>
>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>
>>>>>>
>>>>>>
>>>>>> padmini godavarthi skrev:
>>>>>>     
>>>>>>         
>>>>>>             
>>>>>>> Hi  Kenneth,
>>>>>>> Thanku very much for ur help.............
>>>>>>> i did the coordinate system override as per ur instructions.
>>>>>>> It works fine
>>>>>>> but i felt that the buffer feature is not coming accurately??
>>>>>>> what was the problem????????????????????????????
>>>>>>>
>>>>>>> i mean by observing closely  its not an accurate circle(buffer
>>>>>>> layer).
>>>>>>>
>>>>>>> http://n2.nabble.com/file/n2683455/pic.jpeg 
>>>>>>>
>>>>>>> 2)secondly i want to retrieve the parcel_ids that are included or
>>>>>>> intersected in the buffer layer.How  is it possible ? can u send me
>>>>>>> the
>>>>>>> sample code?????????
>>>>>>>
>>>>>>> Thanks in advance.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Padmini.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>   
>>>>>>>       
>>>>>>>           
>>>>>>>               
>>>>>>>> Thats because the Sheboygan data uses a true georeferenced
>>>>>>>> coordinate 
>>>>>>>> system,
>>>>>>>> and your data is using a non-georeferenced system, like XY-M.
>>>>>>>> Arbitrary should be understood as "non-georeferenced".
>>>>>>>>
>>>>>>>> If your data is not in the same projection as the map, you cannot
>>>>>>>> use 
>>>>>>>> the buffer feature.
>>>>>>>>
>>>>>>>> This then returns to my initial statement: "Coordinate System
>>>>>>>> Override", 
>>>>>>>> which can
>>>>>>>> set the data coordinate system to match the maps.
>>>>>>>>
>>>>>>>> Can you please report what happened with with the suggestions I
>>>>>>>> made,
>>>>>>>> regarding the coordinate system overrides?
>>>>>>>>
>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> padmini godavarthi skrev:
>>>>>>>>     
>>>>>>>>         
>>>>>>>>             
>>>>>>>>                 
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> In my data
>>>>>>>>>
>>>>>>>>>     bool arbitraryMapSrs = (srsMap.GetType() ==
>>>>>>>>> MgCoordinateSystemType.Arbitrary);
>>>>>>>>>
>>>>>>>>> arbitraryMapSrs comes as true but in sheboygan data it comes as
>>>>>>>>> false
>>>>>>>>>
>>>>>>>>>         if (arbitraryMapSrs)
>>>>>>>>>             mapSrsUnits = srsMap.GetUnits();
>>>>>>>>> In mydata mapSrsUnits comes as "meter" but in sheboygan data it
>>>>>>>>> comes
>>>>>>>>> as
>>>>>>>>> null
>>>>>>>>>
>>>>>>>>> so that   
>>>>>>>>>  if ((arbitraryDsSrs != arbitraryMapSrs) || (arbitraryDsSrs &&
>>>>>>>>> (dsSrsUnits
>>>>>>>>> != mapSrsUnits)))
>>>>>>>>>             {
>>>>>>>>>                 excludedLayers++;
>>>>>>>>>                 continue;
>>>>>>>>>             }
>>>>>>>>> In my data  excludedLayers comes as 1 and where as in sheboyan data
>>>>>>>>> this
>>>>>>>>> condition fails....................
>>>>>>>>> Can u plz provide me the solution?????????????
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>> Padmini.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>>>   
>>>>>>>>>       
>>>>>>>>>           
>>>>>>>>>               
>>>>>>>>>                   
>>>>>>>>>> Why do you mention packages?
>>>>>>>>>>
>>>>>>>>>> excludedLayers is incremented because the data coordinate system
>>>>>>>>>> is
>>>>>>>>>> not 
>>>>>>>>>> the same as the map coodinate system.
>>>>>>>>>>
>>>>>>>>>> Please comment on what happend when you attempted my previous
>>>>>>>>>> suggestions.
>>>>>>>>>>
>>>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> padmini godavarthi skrev:
>>>>>>>>>>     
>>>>>>>>>>         
>>>>>>>>>>             
>>>>>>>>>>                 
>>>>>>>>>>                     
>>>>>>>>>>> Hi Kenneth,
>>>>>>>>>>> Thanks for ur suggestions.
>>>>>>>>>>> I have created a package using OGR provider but in the buffering
>>>>>>>>>>> i
>>>>>>>>>>> found
>>>>>>>>>>> some problem that
>>>>>>>>>>>
>>>>>>>>>>>      // exclude layer if:
>>>>>>>>>>>             //  the map is non-arbitrary and the layer is
>>>>>>>>>>> arbitrary
>>>>>>>>>>> or
>>>>>>>>>>> vice-versa
>>>>>>>>>>>             //     or
>>>>>>>>>>>             //  layer and map are both arbitrary but have
>>>>>>>>>>> different
>>>>>>>>>>> units
>>>>>>>>>>>             //
>>>>>>>>>>>             if ((arbitraryDsSrs != arbitraryMapSrs) ||
>>>>>>>>>>> (arbitraryDsSrs
>>>>>>>>>>> &&
>>>>>>>>>>> (dsSrsUnits != mapSrsUnits)))
>>>>>>>>>>>             {
>>>>>>>>>>>                 excludedLayers++;
>>>>>>>>>>>                 continue;
>>>>>>>>>>>             }
>>>>>>>>>>> it gives difference to my data and sheboygan sample data
>>>>>>>>>>> so that in my code  excludedLayers is incremented to 1 so i didnt
>>>>>>>>>>> get
>>>>>>>>>>> the
>>>>>>>>>>> buffer features
>>>>>>>>>>> can u plz tell me the solution?????????????????
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Regards,
>>>>>>>>>>> Padmini.
>>>>>>>>>>>
>>>>>>>>>>>  
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>>>>>   
>>>>>>>>>>>       
>>>>>>>>>>>           
>>>>>>>>>>>               
>>>>>>>>>>>                   
>>>>>>>>>>>                       
>>>>>>>>>>>> I'm not sure that provider is case insensitive.
>>>>>>>>>>>> Try adding the file again, but with the name "PROPERTIES.shp".
>>>>>>>>>>>>
>>>>>>>>>>>> Also, try creating a folder, and place the files in the folder.
>>>>>>>>>>>> Then try to use the "External files" and point to the folder.
>>>>>>>>>>>> Also try pointing directly to the file.
>>>>>>>>>>>>
>>>>>>>>>>>> When the "Test connection" is successfull, try clicking the
>>>>>>>>>>>> rightmost button in the "coordinate system override" field, and
>>>>>>>>>>>> it will show you what the provider returns as the coordinate
>>>>>>>>>>>> system.
>>>>>>>>>>>>
>>>>>>>>>>>> Alternatively, try using the OGR provider instead of the SHP
>>>>>>>>>>>> provider.
>>>>>>>>>>>>
>>>>>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> padmini godavarthi skrev:
>>>>>>>>>>>>     
>>>>>>>>>>>>         
>>>>>>>>>>>>             
>>>>>>>>>>>>                 
>>>>>>>>>>>>                     
>>>>>>>>>>>>                         
>>>>>>>>>>>>> Hi Keneneth,
>>>>>>>>>>>>> First of all thanks for ur patience 
>>>>>>>>>>>>> i have uploaded all the files but i didnt get the coordinate
>>>>>>>>>>>>> system
>>>>>>>>>>>>>
>>>>>>>>>>>>>     http://n2.nabble.com/file/n2676400/file.jpeg 
>>>>>>>>>>>>>
>>>>>>>>>>>>> again i did anything wrong??????????
>>>>>>>>>>>>>
>>>>>>>>>>>>> Regards,
>>>>>>>>>>>>> Padmini.
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>>>>>>>   
>>>>>>>>>>>>>       
>>>>>>>>>>>>>           
>>>>>>>>>>>>>               
>>>>>>>>>>>>>                   
>>>>>>>>>>>>>                       
>>>>>>>>>>>>>                           
>>>>>>>>>>>>>> IIRC Shape files consist of more than just the SHP file.
>>>>>>>>>>>>>> You must upload all the "Properties.*" files to the
>>>>>>>>>>>>>> datasource,
>>>>>>>>>>>>>> even if the upload file dialog is misleading (you must select
>>>>>>>>>>>>>> "All 
>>>>>>>>>>>>>> files" to see them).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> A ticket for this problem is here.
>>>>>>>>>>>>>> http://trac.osgeo.org/mapguide/ticket/783
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> padmini godavarthi skrev:
>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>> but i did it as per ur instruction but it didn't come 
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> http://n2.nabble.com/file/n2676097/over.jpeg 
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> my code as same as previous
>>>>>>>>>>>>>>>  MgResourceIdentifier featSourceId = new
>>>>>>>>>>>>>>> MgResourceIdentifier(selLayer.GetFeatureSourceId());
>>>>>>>>>>>>>>>             MgSpatialContextReader ctxs =
>>>>>>>>>>>>>>> featureSrvc.GetSpatialContexts(featSourceId, false);
>>>>>>>>>>>>>>>             String srsDefDs = "";
>>>>>>>>>>>>>>>             if (ctxs != null && ctxs.ReadNext())
>>>>>>>>>>>>>>>       srsDefDs = ctxs.GetCoordinateSystemWkt();
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> in  srsDefDs i got null
>>>>>>>>>>>>>>> does i did any thing wrong
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Regards,
>>>>>>>>>>>>>>> Padmini.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>       
>>>>>>>>>>>>>>>           
>>>>>>>>>>>>>>>               
>>>>>>>>>>>>>>>                   
>>>>>>>>>>>>>>>                       
>>>>>>>>>>>>>>>                           
>>>>>>>>>>>>>>>                               
>>>>>>>>>>>>>>>> Yes, your FeatureSource reports an empty coordinate system,
>>>>>>>>>>>>>>>> so
>>>>>>>>>>>>>>>> you
>>>>>>>>>>>>>>>> have 
>>>>>>>>>>>>>>>> to specify it manually.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> There is a short explanation on how to use overrides here:
>>>>>>>>>>>>>>>> http://trac.osgeo.org/fdo/wiki/FdoGdalNotes#OverridingCoordinateSystems
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> padmini godavarthi skrev:
>>>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>>>>                                 
>>>>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>>>> thanks but is it necessary overriding a coordinate
>>>>>>>>>>>>>>>>> system????????
>>>>>>>>>>>>>>>>> How it willbe done???????
>>>>>>>>>>>>>>>>> can u provide me some guidance???????
>>>>>>>>>>>>>>>>> i have seen ur link but no data available in that for
>>>>>>>>>>>>>>>>> overrides
>>>>>>>>>>>>>>>>> coordinate
>>>>>>>>>>>>>>>>> system
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> http://trac.osgeo.org/mapguide/wiki/maestro/UserGuides/RasterFeatureSource
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> can u plz tell me????????????
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Regards,
>>>>>>>>>>>>>>>>> Padmini.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>>>       
>>>>>>>>>>>>>>>>>           
>>>>>>>>>>>>>>>>>               
>>>>>>>>>>>>>>>>>                   
>>>>>>>>>>>>>>>>>                       
>>>>>>>>>>>>>>>>>                           
>>>>>>>>>>>>>>>>>                               
>>>>>>>>>>>>>>>>>                                   
>>>>>>>>>>>>>>>>>> No, I meant "Coordinate System Override", which is located
>>>>>>>>>>>>>>>>>> on
>>>>>>>>>>>>>>>>>> the 
>>>>>>>>>>>>>>>>>> FeatureSource editor at the bottom.
>>>>>>>>>>>>>>>>>> See screenshots here:
>>>>>>>>>>>>>>>>>> http://trac.osgeo.org/mapguide/wiki/maestro/UserGuides/RasterFeatureSource
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> padmini godavarthi skrev:
>>>>>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>>>>>>                                 
>>>>>>>>>>>>>>>>>>                                     
>>>>>>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>>>>>> Thanks for ur reply 
>>>>>>>>>>>>>>>>>>> u man to say in mapdefinition(in maestro)????????????????
>>>>>>>>>>>>>>>>>>> iam using maestro and i have selected  the coordinate
>>>>>>>>>>>>>>>>>>> system
>>>>>>>>>>>>>>>>>>> as  
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> http://n2.nabble.com/file/n2675676/coor.jpeg 
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> does i did any thing wrong???????????????
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Regards,
>>>>>>>>>>>>>>>>>>> Padmini.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>>>>>       
>>>>>>>>>>>>>>>>>>>           
>>>>>>>>>>>>>>>>>>>               
>>>>>>>>>>>>>>>>>>>                   
>>>>>>>>>>>>>>>>>>>                       
>>>>>>>>>>>>>>>>>>>                           
>>>>>>>>>>>>>>>>>>>                               
>>>>>>>>>>>>>>>>>>>                                   
>>>>>>>>>>>>>>>>>>>                                       
>>>>>>>>>>>>>>>>>>>> Have you tried to add a coordinate system override,
>>>>>>>>>>>>>>>>>>>> using Maestro or Studio?
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> padmini godavarthi skrev:
>>>>>>>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>>>>>>>>                                 
>>>>>>>>>>>>>>>>>>>>                                     
>>>>>>>>>>>>>>>>>>>>                                         
>>>>>>>>>>>>>>>>>>>>>  Hi,
>>>>>>>>>>>>>>>>>>>>> iam using mapguide opensource 2.0 (with .net 2.0 +IIS
>>>>>>>>>>>>>>>>>>>>> 5.1)
>>>>>>>>>>>>>>>>>>>>> i want to make a buffer to my data
>>>>>>>>>>>>>>>>>>>>> the buffer function works fine for this sheboygan data
>>>>>>>>>>>>>>>>>>>>> but
>>>>>>>>>>>>>>>>>>>>> not
>>>>>>>>>>>>>>>>>>>>> for
>>>>>>>>>>>>>>>>>>>>> my
>>>>>>>>>>>>>>>>>>>>> data
>>>>>>>>>>>>>>>>>>>>> i have debugged the application and i got the error at
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>     MgResourceIdentifier featSourceId = new
>>>>>>>>>>>>>>>>>>>>> MgResourceIdentifier(selLayer.GetFeatureSourceId());
>>>>>>>>>>>>>>>>>>>>>             MgSpatialContextReader ctxs =
>>>>>>>>>>>>>>>>>>>>> featureSrvc.GetSpatialContexts(featSourceId, false);
>>>>>>>>>>>>>>>>>>>>>             String srsDefDs = "";
>>>>>>>>>>>>>>>>>>>>>             if (ctxs != null && ctxs.ReadNext())
>>>>>>>>>>>>>>>>>>>>>       srsDefDs = ctxs.GetCoordinateSystemWkt();
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> In Sheboygan data  
>>>>>>>>>>>>>>>>>>>>> srsDefDs comes as  GEOGCS["WGS84 Lat/Long's, Degrees,
>>>>>>>>>>>>>>>>>>>>> -180
>>>>>>>>>>>>>>>>>>>>> ==>
>>>>>>>>>>>>>>>>>>>>> +180",DATUM["D_WGS_1984",SPHEROID["World_Geodetic_System_of_1984",6378137,298.257222932867]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> but for my data
>>>>>>>>>>>>>>>>>>>>>   srsDefDs comes as null 
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Actually my data is in coordinate system 
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS
>>>>>>>>>>>>>>>>>>>>> 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> can u plz tell me the solution????????????????????????
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> plzzz
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Regards,
>>>>>>>>>>>>>>>>>>>>> Padmini.
>>>>>>>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>>>>>>>       
>>>>>>>>>>>>>>>>>>>>>           
>>>>>>>>>>>>>>>>>>>>>               
>>>>>>>>>>>>>>>>>>>>>                   
>>>>>>>>>>>>>>>>>>>>>                       
>>>>>>>>>>>>>>>>>>>>>                           
>>>>>>>>>>>>>>>>>>>>>                               
>>>>>>>>>>>>>>>>>>>>>                                   
>>>>>>>>>>>>>>>>>>>>>                                       
>>>>>>>>>>>>>>>>>>>>>                                           
>>>>>>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>>>>>>> mapguide-users mailing list
>>>>>>>>>>>>>>>>>>>> mapguide-users at lists.osgeo.org
>>>>>>>>>>>>>>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>>>>>>>>                                 
>>>>>>>>>>>>>>>>>>>>                                     
>>>>>>>>>>>>>>>>>>>>                                         
>>>>>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>>>>>       
>>>>>>>>>>>>>>>>>>>           
>>>>>>>>>>>>>>>>>>>               
>>>>>>>>>>>>>>>>>>>                   
>>>>>>>>>>>>>>>>>>>                       
>>>>>>>>>>>>>>>>>>>                           
>>>>>>>>>>>>>>>>>>>                               
>>>>>>>>>>>>>>>>>>>                                   
>>>>>>>>>>>>>>>>>>>                                       
>>>>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>>>>> mapguide-users mailing list
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>>>>>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>>>>>>                                 
>>>>>>>>>>>>>>>>>>                                     
>>>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>>>       
>>>>>>>>>>>>>>>>>           
>>>>>>>>>>>>>>>>>               
>>>>>>>>>>>>>>>>>                   
>>>>>>>>>>>>>>>>>                       
>>>>>>>>>>>>>>>>>                           
>>>>>>>>>>>>>>>>>                               
>>>>>>>>>>>>>>>>>                                   
>>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>>> mapguide-users mailing list
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>>>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>>>>                                 
>>>>>>>>>>>>>>>   
>>>>>>>>>>>>>>>       
>>>>>>>>>>>>>>>           
>>>>>>>>>>>>>>>               
>>>>>>>>>>>>>>>                   
>>>>>>>>>>>>>>>                       
>>>>>>>>>>>>>>>                           
>>>>>>>>>>>>>>>                               
>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>> mapguide-users mailing list
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>>>>>>>>>>>>>>     
>>>>>>>>>>>>>>         
>>>>>>>>>>>>>>             
>>>>>>>>>>>>>>                 
>>>>>>>>>>>>>>                     
>>>>>>>>>>>>>>                         
>>>>>>>>>>>>>>                             
>>>>>>>>>>>>>   
>>>>>>>>>>>>>       
>>>>>>>>>>>>>           
>>>>>>>>>>>>>               
>>>>>>>>>>>>>                   
>>>>>>>>>>>>>                       
>>>>>>>>>>>>>                           
>>>>>>>>>>>> _______________________________________________
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>>>>>>>>>>>>         
>>>>>>>>>>>>             
>>>>>>>>>>>>                 
>>>>>>>>>>>>                     
>>>>>>>>>>>>                         
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>>>>>>>>>>>           
>>>>>>>>>>>               
>>>>>>>>>>>                   
>>>>>>>>>>>                       
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>>>>>>>>>>         
>>>>>>>>>>             
>>>>>>>>>>                 
>>>>>>>>>>                     
>>>>>>>>>   
>>>>>>>>>       
>>>>>>>>>           
>>>>>>>>>               
>>>>>>>>>                   
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>>>>>>>               
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