Hi,the cadastre data ( Suisse ) are full of this overlaps, It happens when they introduce arc curves ( specially with streets ), i suppose due to inaccuracy of the computation of the arc points or for historically reason ( digitizing errors ) or simply
because is cheaper to measure.
Attached the image of the overlap. In addition I have some more questions: Will topology support edge with arcs and not only linestrings?I try to insert into an empty topology geometries with functions TopoGeo_AddLineString, addEdge, addIsoEdge and is incredibly slow, it was only a small subset of data ( 20'000 lines ) and after waiting 10 minutes I dropped out, why is so slow or maybe there is another way
to insert data? Thanks Mario Jurcevic -- http://www.soft-gis.com On 09/27/2012 08:00 AM, Christophe Vergon wrote:
Hi, "cadastre" data means that you're french ? I do the same, importing french survey data in postgis 2.0 with topology.I think that you're not in the right way. Have a look at topogeo_addpolygon function with tolerance=0.It's a better way to fix french survey data topology troubles. Mario Jurcevic a écrit :Hello,I am testing postgis topology with cadastre data, overlapping of edges with given tolerance is allowed.How to handle this kind of data: insert,modify,etc?Is possible to temporary disable the validation and or implement a custom validation?Thanks in advance Mario Jurcevic _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
<<attachment: overlap.png>>
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