[mapguide-users] can anyone solved this buffer problem
Kenneth Skovhede, GEOGRAF A/S
ks at geograf.dk
Thu Apr 23 08:54:16 EDT 2009
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.
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> _______________________________________________
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>>>>>>>>>>>> mapguide-users at lists.osgeo.org
>>>>>>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
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>>>>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>
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