Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
I ran into this old problem today, using the OSGeo4W daily 6.5 build. http://lists.osgeo.org/pipermail/mapserver-users/2009-August/thread.html#62527 http://trac.osgeo.org/mapserver/ticket/3100 Google finds quite a lot of non-mapserver-related questions about this error, but perhaps (as was suggested in the ticket), something can be done to avoid it, as it is related to GEOS (EdgeEndStar::propagateSideLabels). Mapserver seems to render the problematic geometry with no problem, but fails when a query (WMS GetFeatureInfo) falls near it. I think it can't be related to input file format, as it does the same with KML, spatialite, and GML. I have made a simple set of data that shows the problem, but I'm not sure what parts I should post, as altogether it's quite long. ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Frank Warmerdam wrote: > > I still don't understand why things are going through GEOS and I'm hopeful > you will be able to file a ticket that allows us to track this down. > I created it: http://trac.osgeo.org/mapserver/ticket/3100 Thanks all you again! -- View this message in context: http://n2.nabble.com/msOGRFileNextShape-OGR-error-TopologyException-side-location-conflict-tp2535201p3477924.html Sent from the Mapserver - User mailing list archive at Nabble.com. ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Friend Vn 2000 wrote: Thanks Frank, Daniel and Oliver, I'm sure that my data has topology errors. I'm using pure MS4W and my method is PHPMapscript. My small application is only for zoom, pan. In my experience, I also think MapServer or any mapping engine can draw a request map without checking its topology for legal or not. And my .mdb file runs well in ArcMap or ArcCatalog, and I think they don't take notice of topology when playing my file. Friend, You are correct that MapServer does not really care about the consistency of the geometries. This problem appears to be caused by use of GEOS and that GEOS is very picky about geometry correctness. I still don't understand why things are going through GEOS and I'm hopeful you will be able to file a ticket that allows us to track this down. Best regards, -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush| Geospatial Programmer for Rent ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Friend Vn 2000 wrote: Thanks Frank, Daniel and Oliver, I'm sure that my data has topology errors. I'm using pure MS4W and my method is PHPMapscript. For the record, I believe you are using an older MS4W version, so you might want to upgrade to MS4W 3.0 and then re-test...just to make sure that you are using more recent versions of MapServer, GEOS, and GDAL when talking to the developers. -jeff -- Jeff McKenna FOSS4G Consulting and Training Services http://www.gatewaygeomatics.com/ ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Thanks Frank, Daniel and Oliver, I'm sure that my data has topology errors. I'm using pure MS4W and my method is PHPMapscript. My small application is only for zoom, pan. In my experience, I also think MapServer or any mapping engine can draw a request map without checking its topology for legal or not. And my .mdb file runs well in ArcMap or ArcCatalog, and I think they don't take notice of topology when playing my file. Best regards, --- On Tue, 8/18/09, Frank Warmerdam wrote: Friend, I believe this error is coming from GEOS and likely occurs when the geometries from the file are translated into GEOS format in order to do a spatial comparison test against the map view within OGR. This likely is due to a linestring or polygon being invalid - perhaps due to self-intersection. Actually, I'm surprised that things would dip into the GEOS geometry comparisons. MapServer is careful to only set rectangular spatial filters and OGR is supposed to short circuit this case to avoid GEOS. I'm not really sure why you end up in GEOS. Are you doing any other fancy stuff that might end up in GEOS? If you could boil this down to something similar I could use to reproduce the problem, I would be willing to have Chaitanya look into it. It would need to be filed as a GDAL ticket. Best regards, -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Hi, we recently struggled with exactely the same kind of errors (TopologyException) when reading S57 data through ogr. We discovered that the problem only occured when gdal/ogr was build against GEOS. We rebuild without GEOS support and the TopologyExceptions dissapeard. Best regards, Oliver 2009/8/18 Daniel Morissette : > Friend Vn 2000 wrote: >> >> I still get this error now ( I use MS4W v2.3.1 - mapserv 5.2.1 ). >> My data source is a .mdb Personal Geodabase file. This is the first time I >> use this kind for input. I found the map engine doesn't work stably and this >> error appears frequently. Sometime the error not shown but some features in >> the map disappear mysterious-ly. > > I see two possibilities: it is either a bug in the OGR driver for Personal > Geodatabase, or the specific file you are trying to open does not have clean > topology in it, but either way this is very unlikely to be a direct > MapServer issue. The first thing you should do is ensure that the dataset > has clean topology in it. I'm sorry, I don't know how to do that with recent > versions of ESRI software, but I remember that in the days of Arc/Info 7.x > you'd do a CLEAN/BUILD on your coverage to rebuild the topology. > > Once you are sure that the topology is valid, you could try running > GDAL/OGR's "ogrinfo" or "ogr2ogr" utilities on your dataset, if it's a OGR > driver problem then the utilities will probably produce the same errors, in > which case your best bet would be to file a GDAL/OGR ticket with a dataset > to reproduce the issue, so that the maintainer of the driver can have a look > and see if something can be done about this issue. > > Daniel > -- > Daniel Morissette > http://www.mapgears.com/ > ___ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Friend Vn 2000 wrote: I still get this error now ( I use MS4W v2.3.1 - mapserv 5.2.1 ). My data source is a .mdb Personal Geodabase file. This is the first time I use this kind for input. I found the map engine doesn't work stably and this error appears frequently. Sometime the error not shown but some features in the map disappear mysterious-ly. Thanks! --- On *Thu, 3/26/09, Daniel Morissette //* wrote: From: Daniel Morissette Subject: Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict To: "MapserverList OSGEO" Date: Thursday, March 26, 2009, 6:36 AM Tamas Szekeres wrote: > > msDrawMap(): Image handling error. Failed to draw layer named 'MainStreet'.;msOGRFileNextShape(): OGR error. TopologyException: side location conflict 19.0499 47.5334 1.7e-308 > > Does anyone know where this error is coming from? I've seached for these strings in the MapServer and OGR code but didn't find any hit. Friend, I believe this error is coming from GEOS and likely occurs when the geometries from the file are translated into GEOS format in order to do a spatial comparison test against the map view within OGR. This likely is due to a linestring or polygon being invalid - perhaps due to self-intersection. Actually, I'm surprised that things would dip into the GEOS geometry comparisons. MapServer is careful to only set rectangular spatial filters and OGR is supposed to short circuit this case to avoid GEOS. I'm not really sure why you end up in GEOS. Are you doing any other fancy stuff that might end up in GEOS? If you could boil this down to something similar I could use to reproduce the problem, I would be willing to have Chaitanya look into it. It would need to be filed as a GDAL ticket. Best regards, -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush| Geospatial Programmer for Rent ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Friend Vn 2000 wrote: I still get this error now ( I use MS4W v2.3.1 - mapserv 5.2.1 ). My data source is a .mdb Personal Geodabase file. This is the first time I use this kind for input. I found the map engine doesn't work stably and this error appears frequently. Sometime the error not shown but some features in the map disappear mysterious-ly. I see two possibilities: it is either a bug in the OGR driver for Personal Geodatabase, or the specific file you are trying to open does not have clean topology in it, but either way this is very unlikely to be a direct MapServer issue. The first thing you should do is ensure that the dataset has clean topology in it. I'm sorry, I don't know how to do that with recent versions of ESRI software, but I remember that in the days of Arc/Info 7.x you'd do a CLEAN/BUILD on your coverage to rebuild the topology. Once you are sure that the topology is valid, you could try running GDAL/OGR's "ogrinfo" or "ogr2ogr" utilities on your dataset, if it's a OGR driver problem then the utilities will probably produce the same errors, in which case your best bet would be to file a GDAL/OGR ticket with a dataset to reproduce the issue, so that the maintainer of the driver can have a look and see if something can be done about this issue. Daniel -- Daniel Morissette http://www.mapgears.com/ ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
I still get this error now ( I use MS4W v2.3.1 - mapserv 5.2.1 ). My data source is a .mdb Personal Geodabase file. This is the first time I use this kind for input. I found the map engine doesn't work stably and this error appears frequently. Sometime the error not shown but some features in the map disappear mysterious-ly. Thanks! --- On Thu, 3/26/09, Daniel Morissette wrote: From: Daniel Morissette Subject: Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict To: "MapserverList OSGEO" Date: Thursday, March 26, 2009, 6:36 AM Tamas Szekeres wrote: > > msDrawMap(): Image handling error. Failed to draw layer named > 'MainStreet'.;msOGRFileNextShape(): OGR error. TopologyException: side > location conflict 19.0499 47.5334 1.7e-308 > > Does anyone know where this error is coming from? I've seached for these > strings in the MapServer and OGR code but didn't find any hit. > In which format is the data? I suspect the error may come from the OGR driver or a lib used by the OGR code. Daniel -- Daniel Morissette http://www.mapgears.com/ ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] msOGRFileNextShape(): OGR error. TopologyException: side location conflict
Tamas Szekeres wrote: msDrawMap(): Image handling error. Failed to draw layer named 'MainStreet'.;msOGRFileNextShape(): OGR error. TopologyException: side location conflict 19.0499 47.5334 1.7e-308 Does anyone know where this error is coming from? I've seached for these strings in the MapServer and OGR code but didn't find any hit. In which format is the data? I suspect the error may come from the OGR driver or a lib used by the OGR code. Daniel -- Daniel Morissette http://www.mapgears.com/ ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
