[postgis-users] Preparing for Topology - St_CreateTopoGeo

[Chris English]

Looking for triggers town by town
-- Executing query:select topology.createtopology('bh_parcels', 32011);"Topology bh_parcels populated"Not that town
4887 rows in, 13533 edge rows out 4888 face rows 8917 nodes out________________________________


> From: sglish at hotmail.com 
> To: postgis-users at postgis.refractions.net 
> Date: Sat, 3 Dec 2011 13:22:32 -0500 
> Subject: Re: [postgis-users] Preparing for Topology - St_CreateTopoGeo 
>  
> in any case, to your point of trying to isolate a portion that triggers  
> a bug in 
> St_CreateTopoGeo, some candidates are suggested by taking the geoms  
> reported as Error initially: 
>  
> select gid, mun from unioncountyparcels where geom &&  
> ST_AsEWKT('01060000200B7D00000100000001030000000100000007000000204F2F7CE23C214140AA79907071244180EF6AE12B3D2141C0EF55BC50712441E0ACD564CC3C21414008958C7470244140F668FF823C2141C0C2B86094702441E0C3B6D3A23C21414066FBC5DD702441607EDAA7C23C2141C006372B27712441204F2F7CE23C214140AA799070712441') 
>   ; 
> (later-> possible_triggers_2) 
> gid____mun 
> 37854;"2004" 
> 27568;"2004" 
> 31314;"2004" 
> 32373;"2004" 
> 34949;"2004" 
> 36301;"2004" 
> 36303;"2004" 
> 37096;"2004" 
> 133778;"2019" 
> 133779;"2019" 
>  
> or 
>  
> select gid, mun from unioncountyparcels where geom &&  
> ST_AsEWKT('01060000200B7D0000010000000103000000010000000500000080CD197443872141804C827B8B72244160C59F12AC872141007C974465722441200CCDF85687214100F7FE58B6712441006624DF018721410032D76ED571244180CD197443872141804C827B8B722441'); 
>  
> (later -> possible_triggers) 
> gid_____mun 
> 25221;"2004" 
> 32369;"2004" 
> 34946;"2004" 
> 34947;"2004" 
> 34948;"2004" 
>  
> select topology.createtopology('possible_triggers', 32011); 
>  
> Select topology.ST_createtopogeo('possible_triggers',St_collect(geom))  
> from possible_triggers; 
> <this populated for the second group> 
> "Topology possible_triggers (3), SRID 32011, precision 0 
> 8 nodes, 12 edges, 5 faces, 0 topogeoms in 0 layers" 
>  
> Select  
> topology.ST_createtopogeo('possible_triggers_2',St_collect(geom)) from  
> possible_triggers_2; 
> "Topology possible_triggers_2 populated" 
>  
> Well, that approach didn't isolate.  Better thoughts on isolating? 
> Chris 
> ________________________________ 
> From: sglish at hotmail.com 
> To: postgis-users at postgis.refractions.net 
> Date: Sat, 3 Dec 2011 09:22:29 -0500 
> Subject: Re: [postgis-users] Preparing for Topology - St_CreateTopoGeo 
>  
> strk, 
>  
> I think that's the next, next step, first I have to figure out the  
> final update 
> of my topo tables and the topology documentation has left me head  
> scratching, i.e. the topology.CreateTopoGeom stage: 
>  
> select edge_id, start_node, end_node, next_left_edge,  
> abs_next_left_edge, next_right_edge, 
> abs_next_right_edge, left_face, geom from union_cty_topo.edge_data limit 1; 
>  
> 20952;271096;271075;20954;20954;-20953;20953;0;"01020000200B7D00000200000060C7D31DEF042041807D82545CA72441C087CB2AB504204140C7FC7E07AA2441" 
>  
> select face_id, mbr from union_cty_topo.face limit 2; 
> 0;"" 
> 7447;"01030000200B7D00000100000005000000C087CB2AB5042041807D82545CA72441C087CB2AB5042041C0E1276882AC2441E06B43906F082041C0E1276882AC2441E06B43906F082041807D82545CA72441C087CB2AB5042041807D82545CA72441" 
>  
> select node_id, containing_face, geom from union_cty_topo.node limit 1; 
> 271075;;"01010000200B7D0000C087CB2AB504204140C7FC7E07AA2441" 
>  
> select topogeo_id, layer_id, element_id,element_type from  
> union_cty_topo.relation limit 1; 
> <no data> 
>  
> select gid, pams_pin, cost, topo  from union_cty_topo.summit_parcels limit 1; 
> <no data> 
>  
> So I take the fact that I don't have node_id.containing_face, and no  
> data in either 
> relation or summit_parcels as my failure to understand this final step  
> of CreateTopoGeom 
>  
> update union_cty_topo.summit_parcels as sp   -- sp is  summit_parcels 
>      set topo = topology.createtopoGeom('union_cty_topo', 
>              3,1 
>              , foo.sfaces) 
> from (Select s.gid,  
> topology.TopoElementaryArray_Agg(Array[f.face.id,3]) as sfaces 
>          From union_cty_topo.summit_parcels as s 
>              Inner Join union_cty_topo.face as f on s.topo && f.mbr -- a  
> little confusion here 
>          where ST_Covers (s.geom,  
> topology.ST_GetFaceGeometry('union_cty_topo', f.face_id)) 
>              Group by s.gid) as foo 
> Where foo.gid =sp.gid; 
>  
> ERROR:  schema "f" does not exist 
>  
>  
> Chris 
>  
> --switched to firefox from chrome in hopes of better plain text client 
>  
>  > Date: Sat, 3 Dec 2011 09:44:37 +0100 
>  > From: strk at keybit.net 
>  > To: postgis-users at postgis.refractions.net 
>  > Subject: Re: [postgis-users] Preparing for Topology - St_CreateTopoGeo 
>  > 
>  > On Fri, Dec 02, 2011 at 10:53:16PM -0500, Chris English wrote: 
>  > 
>  > > SELECT topology.st_createtopogeo('union_cty_topo',ST_Collect(geom)) 
>  > > FROM summit_parcels; 
>  > > "Topology union_cty_topo populated" 
>  > 
>  > Great ! Congratulations ! 
>  > Now maybe you would want to try with another subset of the data 
>  > as I think you were trying to isolate a portion of it that triggers 
>  > a bug in ST_CreateTopoGeo, right ? 
>  > 
>  > --strk; 
>  > 
>  > ,------o-. 
>  > | __/ | Thank you for PostGIS-2.0 Topology ! 
>  > | / 2.0 | http://www.pledgebank.com/postgistopology 
>  > `-o------' 
>  > 
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