[postgis-users] Intersection doesn't work on some data

[David Mitchell]

I'm running Redhat 9.0 with Postgres 7.4 and Postgis 0.8.0 (ok, so not 
latest version).

I'll try on latest versions and see how I fare,

Thanks

David

Paul Ramsey wrote:
> And what platform are you running on?
> 
> strk wrote:
> 
>> This is what I get with postgis-CVS:
>>
>> SRID=-1;MULTILINESTRING((-121.33193 41.18388,-121.34693 41.18388),
>> (-121.34693 41.18388,-121.36293 41.18388),(-121.36293 41.18388,
>> -121.36545 41.18388),(-121.36545 41.18388,-121.37179 41.18388),
>> (-121.37179 41.18388,-121.37608 41.18402),(-121.37608
>> 41.18402,-121.44594 41.18385))
>>
>> This is what you reported as the correct answer:
>>
>> MULTILINESTRING ((-121.331929 41.18388, -121.34693 41.18388),
>> (-121.34693 41.18388, -121.36293 41.18388), (-121.36293 41.18388,
>> -121.36544 41.18388), (-121.36544 41.18388, -121.37179 41.18388),
>> (-121.37179 41.18388, -121.37608 41.18401), (-121.37608
>> 41.184019, -121.44593 41.18384))
>>
>> There is a 0.00001 displacement, but I think the bug you reported has 
>> already been fixed. What version of postgis are you running ?
>>
>> --strk;
>>
>> On Wed, Mar 24, 2004 at 07:02:20PM +0100, strk wrote:
>>
>>> On Wed, Mar 24, 2004 at 09:40:28AM -0800, David Blasby wrote:
>>>
>>>> David,
>>>>
>>>> Thanks for your excellent bug report - it should be "easy" to track 
>>>> down whats causing this problem given all your information.
>>>>
>>>> Its almost certainly involving the conversion between postgis and 
>>>> GEOS - this usually occurs if there's a missed byte somewhere.
>>>>
>>>> Unfortunately, I dont have time to look at this until the beginning 
>>>> of April - perhaps strk could?
>>>>
>>>> dave
>>>
>>>
>>> Yes. I'll take this.
>>>
>>> --strk;
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>>
>>
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> 
> 
> 


-- 
David Mitchell
Software Engineer
Telogis

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