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<p class="MsoNormal">I am trying to build a statewide road network for analysis with pgRouting. I ran pgr_createTopology, and it reported OK.<o:p></o:p></p>
<p class="MsoNormal">Next I tried to run pgr_analyzeGraph, and got an error.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is the command I input:<o:p></o:p></p>
<p class="MsoNormal">SELECT pgr_analyzeGraph('ng_roads',0.0001,the_geom:='geom',id:='gid',source:='sourceroute',target:='targetroute');<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And here is the error message:<o:p></o:p></p>
<p class="MsoNormal">NOTICE: Analyzing for ring geometries. Please wait...<o:p></o:p></p>
<p class="MsoNormal">ERROR: isring() should only be called on a LINE<o:p></o:p></p>
<p class="MsoNormal">CONTEXT: SQL statement "SELECT count(*) FROM public.ng_roads
<o:p></o:p></p>
<p class="MsoNormal"> WHERE true AND (true) and st_isRing(st_linemerge(geom))"<o:p></o:p></p>
<p class="MsoNormal">PL/pgSQL function pgr_analyzegraph(text,double precision,text,text,text,text,text) line 309 at EXECUTE statement<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-What should I do about this? Can I still perform pgRouting analysis with these roads?<o:p></o:p></p>
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