[postgis-users] Trying to figure out topology

[Paul Ramsey]

No, it's not that far along. There is a model and some support  
functions, but the "big money" is in building a topology from non- 
topological data, and that is not there yet.

P

On 5-Jun-07, at 1:40 PM, William Kyngesburye wrote:

> On Jun 5, 2007, at 12:38 PM, William Kyngesburye wrote:
>
>> Now I get to generating topology for each line in the layer.  The  
>> wiki has:
>>
>> select topology.CreateTopoGeom(topology_name, feature_type,  
>> layer_id [as returned from AddTopoGeometryColumn], TopoElementArray);
>>
>> but the link to TopoElementArray doesn't really tell me where to  
>> get those element type/element id pairs for the array.  Would  
>> those be the geom types and feature IDs of the layer?  Would I use  
>> a SQL select to pipe in all the rows of the layer?  Examples would  
>> be much appreciated.
>>
> After poking around in the topology tests in the postgis source,  
> I'm wondering if there are topology *building* functions yet.  It  
> seems to handle only *adding* topology from existing data that has  
> topology, like importing from an ArcGIS coverage.
>
> I guess development is not as far along as I hoped.
>
> -----
> William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
> http://www.kyngchaos.com/
>
> Earth: "Mostly harmless"
>
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>
>
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