Hi List,
I'm new to PostGIS and have inherited a database which is being used to store a
pointcloud.
The data seems to be in a "pcpatch" Data type, and this is being converted into
points for extraction with: "select pc_explode(pa)::geometry ...".
The problem is, I can find no reference to pcpa
From:
postgis-users-boun...@lists.osgeo.org<mailto:postgis-users-boun...@lists.osgeo.org>
mailto:postgis-users-boun...@lists.osgeo.org>>
on behalf of Jonathan Moules
mailto:j.mou...@hrwallingford.com>>
Sent: Friday, February 13, 2015 7:46 AM
To: 'postgis-users@list
Hi Paul,
I suspect I know the answer to this (“no”), but to confirm, is the disk saving
for points going to apply to points stored using the pointcloud extension in a
postgis database?
Thanks,
Jonathan
From: postgis-users-boun...@lists.osgeo.org
[mailto:postgis-users-boun...@lists.osgeo.org] O
patch and sensible xml schema,
you should already have a 1:2 to 1:4 compression of the point size.
(compared to binary ply in my case)
Cheers,
Rémi-C
2015-03-26 18:05 GMT+01:00 Jonathan Moules
mailto:j.mou...@hrwallingford.com>>:
Hi Paul,
I suspect I know the answer to this (“no”), but to con
pc_explode(pa) as pt
)
SELECT block_id , pc_get(pt, 'X') as x, pc_get(pt, 'Y') as y, pc_get(pt, 'Z')
as z
FROM points
Cheers,
Rémi-C
2015-03-26 19:09 GMT+01:00 Jonathan Moules
mailto:j.mou...@hrwallingford.com>>:
Hi Rémi,
Thanks for the reply and information.
Hi List,
I have sets of points (up to 250,000 in a set) and I want to get the furthest
distance between any of them.
In theory the simplest way is to use
ST_MinimumBoundingCircle(ST_Collect(geography) and then get the diameter of
that.
The problem is - I don't seem to be able to get the diamet
tance(a.geom,b.geom) d from f
a cross join f b order by d desc limit 1;
should give you the id of your targets and the distance between them
On Fri, Jun 26, 2015 at 2:54 PM, Jonathan Moules
mailto:j.mou...@hrwallingford.com>> wrote:
Hi List,
I have sets of points (up to 250,0
Hi List,
I have a pointcloud, and I want to turn it into a TIN (so I guess
ST_DelaunayTriangles), and then measure the length of the sides of the
triangles.
Does anyone have any suggestions on how to do this, ideally in a performant
fashion?
I've tried a few things, but I'm currently struggli
Hi List,
Looking at -
http://postgis.net/docs/performance_tips.html#small_tables_large_objects - item
7.1 describes a problem:
"Current PostgreSQL versions (including 8.0) suffer from a query optimizer
weakness regarding TOAST tables."
I was wondering if the issue is resolved in the 9.x serie
Hi List,
I've got a database of about 60 million spatial features that I need to run
through a process.
The process can't do all of them at once, so I want to get the data from
postgis in spatial chunks of up to say 500,000 features per query.
The data itself isn't evenly spatially distributed,
ash-sorting-with-these-three-simple-tricks/
for simplest case, you can just order by your geom field.
ср, 1 мар. 2017 г. в 14:44, Jonathan Moules
<jonathan-li...@lightpear.com>:
Hi List,
I've got a database of about 60 million spatial features that I need to run
through a process.
Hi List,
Thanks for all the suggestions. I think I've solved this using a
combination of methods from the responses and wanted to share for anyone in the
future.
Things I tried that didn't work for me (beyond what was in the previous post):
* Convert to a point, then extract the Lat/Lon
Hi List,
I'm doing a simple ST_Intersects:
select geom
from TABLENAME
where
ST_Intersects(geom, ST_GeomFromText('POLYGON((26 655000, 26 66,
27 66, 27 655000, 26 655000))', 27700))
TABLENAME does have a spatial index. But this query is still taking an
athan
---- On Fri, 17 Mar 2017 14:19:55 + Giuseppe
Broccolo<giuseppe.brocc...@2ndquadrant.it> wrote
Hi Jonathan,
2017-03-17 13:18 GMT+01:00 Jonathan Moules <jonathan-li...@lightpear.com>:
Hi List,
I'm doing a simple ST_Intersects:
select geom
from TABLENAME
14 matches
Mail list logo
