Hello,
does any postgis implementation of ST_SimplifyPreserveTopology preserve
"contains" property for polygons and multilines, that is, if I have a
(Multi)Polygon Parent and a (Multi)Linestring/(Multi)Polygon Child s.t.
ST_Contains(Parent, Child) holds, will
ST_Contains(ST_SimplifyPreserveTopolog
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
Hey,
if you use the compression of 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 :
> Hi Paul,
>
> I suspect I know the answer to this (“no”), but t
"no", a different kind of issue entirely
On Thu, Mar 26, 2015 at 10:05 AM, Jonathan Moules
wrote:
> 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?
>
>
Hi Rémi,
Thanks for the reply and information.
I’m afraid I inherited this database and don’t know much about it (or
pointcloud).
Looking into though, I doubt it’s compressed, we extract the data with:
select block_id , pc_get(pc_explode(pa), 'X') as x, pc_get(pc_explode(pa), 'Y')
as y, pc_get(
Hum you can do a simple test,
for the table you are using,
look at the pgpoint column type number (called pcid)
You can know this like this
SELECT pc_astext(pt)
FROM xyz_patches, pc_explode(pa) as pt
LIMIT 1
Know look into public.pointcloud_formats, the xml schema corresponding to
th
No, it preserves internal topology, not relative topology.
On Thu, Mar 26, 2015 at 9:59 AM, Igor Stassiy wrote:
> Hello,
>
> does any postgis implementation of ST_SimplifyPreserveTopology preserve
> "contains" property for polygons and multilines, that is, if I have a
> (Multi)Polygon Parent and
