> Hello everyone,
>
> Im quite a novice in the Open GIS world, and i would like to know if
> theres any client out there that connects to PostGIS and has a
> Autocomplete polygon tool (like in arcGis).
>
Hi,could you describe a little more what autocomplete polygon function
looks like ?
thanks
> Good people;
>
> I have this odd problem that I hope others may clarify for me.
>
> I have a big ArcInfo polygon coverage produced by a sequence of spatial
> unions. One of the component polygon coverages was brutalized somewhere
> along the way and it has some polygons with triangular and bo
Hi, for an explanation look at
http://gis.washington.edu/esrm250/lessons/create_f_layers/exercise/index.htm
l and search for auto-complete
On PostGIS we normally implement the functionality in an auto-clip function
in either the service layer of the web-application or in the database. It is
a rule
Hi Nicolas, all;
Nicolas, I understand your comment. But after looking at the data some
more in OpenJump, that appears to not be my problem.
If I load the PostGIS theme into OpenJump and run the QA on it, I see
that it is the polygon that contains the bow-tie shaped figure that is
the problem.
Chris,
Can you post the WKT for the problematic feature? (Ascii art is nifty,
but not really a substitute for a 1600x1200 pixel display... 8^)
Chris Hermansen wrote:
Hi Nicolas, all;
Nicolas, I understand your comment. But after looking at the data some
more in OpenJump, that appears to n
Martin, all;
Here is the wkt for the enclosing polygon:
53327 | SRID=1;POLYGON((1224673.7804 499721.97084,1224664.2479
499721.56584,1224639.311 499709.63254,1224658.0919
499675.28084,1224664.2479 499721.56584,1224673.1624
499747.57644,1224676.7094 499739.52814,1224676.916
499740.76654,1224692.
Chris,
This is a classic self-intersecting polygon, which self-touches at a
single point. These are invalid according to the OGC model. They are
valid in some other spatial models (notably ArcSDE), where they are
referred to as "inverted polygons", and are used to represent polygons
with a
Martin,
Thanks for the info. I ended up editing out the offending polygons with
OpenJump; there were only about 20. They were created by someone's
sloppy geoprocessing and we were the lucky beneficiaries.
I guess what is interesting is the self-intersecting and loop
self-intersecting polygons w
Chris Hermansen wrote:
I guess what is interesting is the self-intersecting and loop
self-intersecting polygons were built by ogr2ogr when converting from
ArcInfo coverages to PostGIS.
Now that *is* interesting. Seems like maybe a bug in the ogr2ogr code?
Is it worth asking FW about this?
George Silva pisze:
Imagine that you have a polygon already drawn in your screen. You need
to make another polygon that doesnt overlap the older one, but has one
of the edges coincident.
QGIS 0.9.2 will have such an "auto-cutter" implemented. It's alreday
vaialble in their rc2. To enable it:
Well, it's worth it to me :-) but then I would say that wouldn't I?
I can provide the input ArcInfo coverage for testing. It's big but not
enormous; 50,000 polygons or so.
Martin Davis wrote:
>
> Chris Hermansen wrote:
>> I guess what is interesting is the self-intersecting and loop
>> self-inte
Martin Davis wrote:
Chris Hermansen wrote:
I guess what is interesting is the self-intersecting and loop
self-intersecting polygons were built by ogr2ogr when converting from
ArcInfo coverages to PostGIS.
Now that *is* interesting. Seems like maybe a bug in the ogr2ogr code?
Is it worth
Great, go for it! (I wasn't actually suggesting that *I* do the
contacting. 8^) I'm sure Frank is easy to find)
Chris Hermansen wrote:
Well, it's worth it to me :-) but then I would say that wouldn't I?
I can provide the input ArcInfo coverage for testing. It's big but not
enormous; 50,00
I seem to be having problems loading the Postgis library on a RHEL 5 box
PostgreSQL 8.3.1. I'm getting this error
ERROR: could not load library "/usr/lib/pgsql/liblwgeom.so":
/usr/lib/pgsql/liblwgeom.so: undefined symbol: GEOSTopologyPreserveSimplify
CONTEXT: SQL statement "SELECT postgis_lib_v
On Apr 1, 2008, at 11:39 PM, Paragon Corporation wrote:
/usr/lib/pgsql/liblwgeom.so: undefined symbol:
GEOSTopologyPreserveSimplify
CONTEXT: SQL statement "SELECT postgis_lib_version()"
PL/pgSQL function "postgis_full_version" line 11 at SQL statement
When I run
select postgis_full_version(
Jeshua,
Thanks for the tip, but unfortunately that didn't work.
I verified that the geos-config was in /usr/local/bin/geos-config (and had a
new date on it) - (by the way I had 8.2.5 on this server before I blew it
out so not sure if that may be causing problems)
I reran the configure and make c
On Apr 1, 2008, at 11:39 PM, Paragon Corporation wrote:
ERROR: could not load library "/usr/lib/pgsql/liblwgeom.so":
/usr/lib/pgsql/liblwgeom.so: undefined symbol:
GEOSTopologyPreserveSimplify
CONTEXT: SQL statement "SELECT postgis_lib_version()"
PL/pgSQL function "postgis_full_version" lin
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