Jean David TECHER wrote:
Hi
Please see http://pgrouting.postlbs.org/ function like:
- Shortest Path Dijkstra
- Shortest Path Shooting Star
We should try to find the nearest edge or vertex from your
point(vehicle or emergency point) before finding the path
--david;
thank
Not sure why this was so hard to find:
http://webhelp.esri.com/arcgisserver/9.3/java/index.htm#geodatabases/using_th485132809.htm
looks a bit out of date though.
--
John
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Exact,
that's the problem :
scot3=# SELECT gid, the_geom
scot3-# FROM bd_dispo_final
scot3-# WHERE isempty(centroid(the_geom));
gid
|
the_geom
---
Hi,
just a note:
inserting the same geometry :
INSERT INTO bug (gid, the_geom) VALUES (
1 ,
'010320BE6B0100040081F178483F4F2841D730212506D33C418045F71F474F2841D706623902D33C417E45F71F474F2841D806623902D33C4181F178483F4F2841D730212506D33C41'
);
and
INSERT INTO bug (gid,
Fred and Ghislain,
Thanks - yes that's because of the rounding that happens in ST_GeomFromText --
the ST_GeomFromText is rounding the last couple of digits so the text rep isn't
actually what the geometry is so its probably something like
796579.5624334065668 or some such thing. Looking at
Fred,
Not a stupid question and you are probably right. ST_GeomFromText would
probably work just as well except that you can't control the number of digits
as you can with ST_SnapToGrid.
The main issue I see about that (including the snap to grid) approach is that
as you said, you have
Hi Abhi,
ST_DWithin();
Example:
SELECT p.* FROM yourPoints AS p, yourLine AS l WHERE
ST_DWithin(p.the_geom,l.the_geom,yourTolerance)
Fred
On Wed, Dec 10, 2008 at 1:26 PM, Abhi [EMAIL PROTECTED] wrote:
If I have a set of Point objects, is there a way I can filter out the
Points from this
If I have a set of Point objects, is there a way I can filter out the Points
from this set that lie on a straight line within a certain amount of
tolerance?
--
Cheers,
Abhi
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Hi
I known this sound like a strange question, but is it possible to create a
buffer around 1/2 of geomtry objectt.
If I choose to buffer round a stright line, I get a geomtry that looks
like a sausage, if I buffer round a point, I get a geomtry that looks
like a circle.
What I would like
Mark,
This could be either a mapserver question, or a postgis question
depending on the solution you chose. I would say the following
(untested code):
Mapserver:
- define 3 layers, 1 for each concentric circle using your 1 dd
circle as the template, with duplicates of 2 and 3
Congratulations, you've uncovered a long-standing bug in JTS. Taking
the centroid of a polygon with zero area (or very close to it) results
in an invalid point value for the centroid.
This doesn't apply to linear features, so one workaround is to take the
centroid of the *boundary* of the
Hi All
I have managed to resolve the query with the following suggestion - thanks
to Rob Burgholzer's suggestion to use UNION
Keeping this simple, I kept the following Layer for selecting the polygon
features within the specified distances defined in the class expressions
DATA the_geom FROM
I am updating postgis to 1.3.4 (from 1.3.3) in pkgsrc. It seems the
names of installed docs have changed, and I made the inverse change on
updating to 1.3.3. This seems to be a change in the tarball, given the
date on the postgis.html. While I prefer the single file, it seems
something in the
On Tuesday 09 December 2008, Peter N. Schweitzer wrote:
Richard Greenwood wrote:
On Mon, Dec 8, 2008 at 12:19 PM, Peter N. Schweitzer
[EMAIL PROTECTED] wrote:
Richard Greenwood wrote:
On Thu, Dec 4, 2008 at 1:19 PM, Peter N. Schweitzer
[EMAIL PROTECTED] wrote:
Hello,
I have
Sorry Greg, it's manual, so variation is seeping in. Another reason to
bring the scripted packaging system back up to snuff.
P
On Wed, Dec 10, 2008 at 3:34 PM, Greg Troxel [EMAIL PROTECTED] wrote:
I am updating postgis to 1.3.4 (from 1.3.3) in pkgsrc. It seems the
names of installed docs have
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