Re: [geos-devel] RE: [GEOS] #468: Geometry breaks valid() and buffer(): Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286
I'm thinking that there must be some sort of conflict between the GEOS and geodjango. Has the API changed significantly lately? After installing the latest SVN release (3.4.0dev-CAPI-1.8.0), things got worse, not better. Now no geometry will buffer, even super simple example geometries from wikipedia's wkt entry. Using two geometries from my dataset (attached as wkt), I ran through the geodjango geos api. Operations that seemed to work: .empty .geom_type .num_coords .num_geom .hasz .ring .simple .srid .json .ewkt .hex .hexewkb .geojson .ogr .ewkb .wkb .contains(w2) .crosses(w2) .disjoint(w2) .equals(w2) .equals_exact(w2) .intersects(w2) .overlaps(w2) .touches(w2) .within(w2) .relate(w2) .boundary .centroid .convex_hull .envelope .area .clone .length .prepared .srs Worked, but returned a bogus answer In [17]: w1.distance(w2) Out[17]: 1.7976931348623157e+308 Type errors: .kml GEOS_ERROR: Argument is not a Polygon GEOS_ERROR: Argument is not a Polygon w1.difference(w2) GEOS_ERROR: UnsupportedOperationException: GeometryGraph::add(Geometry *): unknown geometry type: N4geos4geom12MultiPolygonE w1.intersection(w2) GEOS_ERROR: UnsupportedOperationException: GeometryGraph::add(Geometry *): unknown geometry type: N4geos4geom12MultiPolygonE w1.sym_difference(w2) GEOS_ERROR: UnsupportedOperationException: GeometryGraph::add(Geometry *): unknown geometry type: N4geos4geom12MultiPolygonE w1.union(w2) GEOS_ERROR: UnsupportedOperationException: GeometryGraph::add(Geometry *): unknown geometry type: N4geos4geom12MultiPolygonE w1.point_on_surface GEOS_ERROR: UnsupportedOperationException: GeometryGraph::add(Geometry *): unknown geometry type: N4geos4geom10LineStringE GEOS_ERROR: UnsupportedOperationException: GeometryGraph::add(Geometry *): unknown geometry type: N4geos4geom10LineStringE w1.extent GEOS_ERROR: Geometry must be a Point or LineString GEOS_ERROR: Geometry must be a Point or LineString w1.coords GEOS_ERROR: Argument is not a Polygon GEOS_ERROR: Argument is not a Polygon Segfault: w1.simplify() Segmentation fault w1.valid Segmentation fault w1.valid_reason Segmentation fault w1.buffer(20) Segmentation fault I guess I'll go bitch at the GeoDjango folks for a while until I can get an exact reason why things are going fubar when translating from django to geos. Thanks for your time, --Christopher w1fubar.wkt Description: Binary data w2fubar.wkt Description: Binary data ___ geos-devel mailing list geos-devel@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/geos-devel
Re: [geos-devel] RE: [GEOS] #468: Geometry breaks valid() and buffer(): Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286
Thank you Mr. Davis for your attention, I tried your suggestion of buffering elements individually then merging the buffers. I buffered several elements without issue, then got the same program stopping error message as before. On the plus side, I did isolate a polygon that was crashing things. Attached is the wkt and wkb of that polygon. --Christopher On Thu, Aug 18, 2011 at 8:53 PM, Martin Davis mtncl...@telus.net wrote: Incidentally, this is one of those cases where buffering by unioning the buffers of the components far outperforms the straight buffer (for distance = 100, 10 s vs 70 s). This is something you might be able to try, if your data model permits it. Split the geometry into its components, and process them all separately. This should give better performance, and may avoid the GEOS issues. On 8/18/2011 8:43 PM, Martin Davis wrote: I have tested this in JTS 1.12, and can confirm that both isValid and buffer work correctly. The buffer operation does take quite a while and requires a significant amount of memory. So the geometry is fine. There may be some issues with GEOS. On 8/18/2011 3:44 PM, Christopher DeMars wrote: Since the ticket upload function is limited to 256Kb, I thought I would try to send an example file via this list. Attached is water1.wkb, a multipolygon that fubars GEOS buffer or valid functions. I can supply water2 and/or either file as wkt. Thank you for any help you can offer, --Christopher -- Forwarded message -- From: GEOS geos-t...@osgeo.org Date: Thu, Aug 18, 2011 at 3:08 PM Subject: [GEOS] #468: Geometry breaks valid() and buffer(): Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286 To: #468: Geometry breaks valid() and buffer(): Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286 +--- Reporter: chdemars | Owner: strk Type: defect | Status: new Priority: major | Milestone: 3.3.1 Component: Core | Version: 3.3.0 Severity: Unassigned | Keywords: +--- GEOS is pretty far down in the software stack I'm using, but it looks like my program stopping error lies there. Software being used: geos-config --version 3.3.0 I'm using GeoDjango and PostGIS on top of GEOS with development taking place on Mac OSX Geometry source: original source is: http://www.water.ca.gov/landwateruse/docs/landusedata/shapes/04bu.zip After loading that (and the other DWR land use files) into my PostGIS/GeoDjango database I extracted all the water features using: water = DWRlanduse.objects.filter(class1__contains='NW', survey_area__contains='BUTTE COUNTY').collect() I have attached the wkb and wkt output of the above with water1 using .unionagg() and water2 using .collect() to produce a MultiPolygon and GeometryCollection respectively. Both produce failure. If I try to use .buffer() or .valid() functions on either water1 or water2 I get the same failure: Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286 which says one of the 'childBoundables' is of an unsupported type. Functions like area or centroid work fine. I would like to know if the error is a problem with GEOS and/or a problem with the geometry. Regardless of the source of error, I would also like to know how to go about fixing it. Thank you for your time and efforts, --Christopher -- Ticket URL: http://trac.osgeo.org/geos/ticket/468 GEOS http://geos.refractions.net/ GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS). ___ geos-devel mailing list geos-devel@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/geos-devel - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1392 / Virus Database: 1520/3842 - Release Date: 08/18/11 ___ geos-devel mailing list geos-devel@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/geos-devel No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1392 / Virus Database: 1520/3842 - Release Date: 08/18/11 ___ geos-devel mailing list geos-devel@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/geos-devel fubargeom.wkb Description: Binary data fubargeom.wkt Description: Binary data ___ geos-devel mailing list geos-devel@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/geos-devel
Re: [geos-devel] RE: [GEOS] #468: Geometry breaks valid() and buffer(): Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286
I initially wasn't sure if the failure was caused by a particular geometry formation or due to the size of the dataset. I have since tried other county layers from the same source (California Department of Water Resources) and got the same error after processing a small number of polygons, so whatever the polygon encoding issue, it is fairly common in this dataset. I can extract other example polygons if anyone is interested. --Christopher On Fri, Aug 19, 2011 at 8:24 AM, Martin Davis mtncl...@telus.net wrote: Good to have the problem narrowed down. There's nothing obviously wrong with the polygon, at least from the JTS perspective. Perhaps Sandro can shed some light on the issue... On 8/19/2011 7:03 AM, Christopher DeMars wrote: Thank you Mr. Davis for your attention, I tried your suggestion of buffering elements individually then merging the buffers. I buffered several elements without issue, then got the same program stopping error message as before. On the plus side, I did isolate a polygon that was crashing things. Attached is the wkt and wkb of that polygon. --Christopher On Thu, Aug 18, 2011 at 8:53 PM, Martin Davis mtncl...@telus.net wrote: Incidentally, this is one of those cases where buffering by unioning the buffers of the components far outperforms the straight buffer (for distance = 100, 10 s vs 70 s). This is something you might be able to try, if your data model permits it. Split the geometry into its components, and process them all separately. This should give better performance, and may avoid the GEOS issues. On 8/18/2011 8:43 PM, Martin Davis wrote: I have tested this in JTS 1.12, and can confirm that both isValid and buffer work correctly. The buffer operation does take quite a while and requires a significant amount of memory. So the geometry is fine. There may be some issues with GEOS. On 8/18/2011 3:44 PM, Christopher DeMars wrote: Since the ticket upload function is limited to 256Kb, I thought I would try to send an example file via this list. Attached is water1.wkb, a multipolygon that fubars GEOS buffer or valid functions. I can supply water2 and/or either file as wkt. Thank you for any help you can offer, --Christopher -- Forwarded message -- From: GEOS geos-t...@osgeo.org Date: Thu, Aug 18, 2011 at 3:08 PM Subject: [GEOS] #468: Geometry breaks valid() and buffer(): Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286 To: #468: Geometry breaks valid() and buffer(): Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286 +--- Reporter: chdemars | Owner: strk Type: defect | Status: new Priority: major | Milestone: 3.3.1 Component: Core | Version: 3.3.0 Severity: Unassigned | Keywords: +--- GEOS is pretty far down in the software stack I'm using, but it looks like my program stopping error lies there. Software being used: geos-config --version 3.3.0 I'm using GeoDjango and PostGIS on top of GEOS with development taking place on Mac OSX Geometry source: original source is: http://www.water.ca.gov/landwateruse/docs/landusedata/shapes/04bu.zip After loading that (and the other DWR land use files) into my PostGIS/GeoDjango database I extracted all the water features using: water = DWRlanduse.objects.filter(class1__contains='NW', survey_area__contains='BUTTE COUNTY').collect() I have attached the wkb and wkt output of the above with water1 using .unionagg() and water2 using .collect() to produce a MultiPolygon and GeometryCollection respectively. Both produce failure. If I try to use .buffer() or .valid() functions on either water1 or water2 I get the same failure: Assertion failed: (0), function query, file AbstractSTRtree.cpp, line 286 which says one of the 'childBoundables' is of an unsupported type. Functions like area or centroid work fine. I would like to know if the error is a problem with GEOS and/or a problem with the geometry. Regardless of the source of error, I would also like to know how to go about fixing it. Thank you for your time and efforts, --Christopher -- Ticket URL: http://trac.osgeo.org/geos/ticket/468 GEOS http://geos.refractions.net/ GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS). ___ geos-devel mailing list geos-devel@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/geos-devel - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1392 / Virus Database: 1520/3842 - Release Date: 08/18/11 ___ geos-devel mailing list geos-devel@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/geos-devel No virus
