<font color="#3366ff">Dear All,</font><div><font color="#3366ff"><br></font></div><div><font color="#3366ff"> When PostGIS2.0 will be out for windows.</font></div><div><font color="#3366ff"><br></font></div><div><font color="#3366ff">Thanks and Regards,</font></div>
<div><font color="#3366ff"><br></font></div><div><font color="#3366ff">Venkat<br></font><br><div class="gmail_quote">On Thu, Sep 16, 2010 at 12:30 AM, <span dir="ltr"><<a href="mailto:postgis-users-request@postgis.refractions.net">postgis-users-request@postgis.refractions.net</a>></span> wrote:<br>
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Today's Topics:<br>
<br>
1. Inserting Geometries into PostGres database - ??? (CS)<br>
2. Re: Inserting Geometries into PostGres database - ???<br>
(Stephen Woodbridge)<br>
3. Re: unioning a buffer - bug? (Kevin Neufeld)<br>
4. Re: Inserting Geometries into PostGres database - ???<br>
(Kevin Neufeld)<br>
5. ST_Split function is not working in PostGIS 1.5 (venkat)<br>
6. Re: ST_Split function is not working in PostGIS 1.5<br>
(Paragon Corporation)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 14 Sep 2010 16:12:23 -0500<br>
From: CS <<a href="mailto:cspam1234@gmail.com">cspam1234@gmail.com</a>><br>
Subject: [postgis-users] Inserting Geometries into PostGres database -<br>
???<br>
To: <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
Message-ID: <<a href="mailto:C05C04F7-4F38-42D5-8C94-91D910C2E336@gmail.com">C05C04F7-4F38-42D5-8C94-91D910C2E336@gmail.com</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Hi all. I am having problems inserting a geometry type into a database. I am using postgres 8.4 and whatever the latest postgis there is(i forgot now). Linux with glassfish is the server environment.<br>
<br>
I have seen multiple hardcoded examples about how to insert something in the VALUES clause but what if i have an array of polygons that cannot be hardcoded that is already determined? That is the coordinates and type of the shape is already decided. This lends to the question as to whether you can use a preparedStatement and setString to insert a geometry. This is what i need some help on.<br>
<br>
<br>
an example of a WKT for a certain cell that i have is:<br>
<br>
POLYGON ((-90.406 31.07360133086052, -90.406 31.34423828125, -90.09073538749632 31.34423828125, -90.09073538749632 31.07360133086052, -90.406 31.07360133086052))<br>
<br>
i want to be able to take this(as a string, if possible) and insert into the database using a prepared statement.<br>
<br>
<br>
PreparedStatement.setString(1, cells[cellIndex].getShape().getWkt());, where getWKT returns the string representation. Of course this doesnt work because the type of the column is a postgis geometry. So, again, how do you use a prepared statement to insert a WKT string representation?<br>
<br>
<br>
I have tried this:<br>
<br>
String tempString = cells[cellIndex].getShape().getWkt();<br>
String parameterInsert = "insert into Cell(result, report, modified, cellid, missionid, shape) values (?, ?, ?, ?, ?, GeomFromText(tempString,4326))";<br>
<br>
where tempString would be the POLYGON above and i get the error: org.postgresql.util.PSQLException: ERROR: Invalid OGC WKT (does not<br>
start with P,L,M or G), which doesnt really make much sense to me.<br>
<br>
I try to put single quotes around each one like:<br>
<br>
String tempString = "'" + cells[cellIndex].getShape().getWkt() + "'";<br>
<br>
and i get the error that tempString as a column does not exist.<br>
<br>
<br>
There also seems to be some confusion on the postgis message boards whether a single quote is even needed. I was never able to come to a definite conclusion.<br>
<br>
<br>
I would appreciate help to all who could help. ive tried everything that i know at this point. Thanks a bunch in advance!<br>
<br>
CS<br>
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Message: 2<br>
Date: Tue, 14 Sep 2010 17:38:56 -0400<br>
From: Stephen Woodbridge <<a href="mailto:woodbri@swoodbridge.com">woodbri@swoodbridge.com</a>><br>
Subject: Re: [postgis-users] Inserting Geometries into PostGres<br>
database - ???<br>
To: <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
Message-ID: <<a href="mailto:4C8FEB70.3040808@swoodbridge.com">4C8FEB70.3040808@swoodbridge.com</a>><br>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>
<br>
On 9/14/2010 5:12 PM, CS wrote:<br>
> Hi all. I am having problems inserting a geometry type into a database.<br>
> I am using postgres 8.4 and whatever the latest postgis there is(i<br>
> forgot now). Linux with glassfish is the server environment.<br>
><br>
> I have seen multiple hardcoded examples about how to insert something in<br>
> the VALUES clause but what if i have an array of polygons that cannot be<br>
> hardcoded that is already determined? That is the coordinates and type<br>
> of the shape is already decided. This lends to the question as to<br>
> whether you can use a preparedStatement and setString to insert a<br>
> geometry. This is what i need some help on.<br>
><br>
><br>
> an example of a WKT for a certain cell that i have is:<br>
><br>
> POLYGON ((-90.406 31.07360133086052, -90.406 31.34423828125,<br>
> -90.09073538749632 31.34423828125, -90.09073538749632 31.07360133086052,<br>
> -90.406 31.07360133086052))<br>
><br>
> i want to be able to take this(as a string, if possible) and insert into<br>
> the database using a prepared statement.<br>
><br>
><br>
> PreparedStatement.setString(1, cells[cellIndex].getShape().getWkt());,<br>
> where getWKT returns the string representation. Of course this doesnt<br>
> work because the type of the column is a postgis geometry. So, again,<br>
> how do you use a prepared statement to insert a WKT string representation?<br>
><br>
><br>
> I have tried this:<br>
><br>
> String tempString = cells[cellIndex].getShape().getWkt();<br>
> String parameterInsert = "insert into Cell(result, report, modified,<br>
> cellid, missionid, shape) values (?, ?, ?, ?, ?,<br>
> GeomFromText(tempString,4326))";<br>
<br>
You might try something like:<br>
<br>
String parameterInsert = "insert into Cell(result, report, modified,<br>
cellid, missionid, shape) values (?, ?, ?, ?, ?,<br>
GeomFromText(" + tempString + ",4326))";<br>
<br>
And see if that works.<br>
<br>
-Steve W<br>
<br>
> where tempString would be the POLYGON above and i get the error:<br>
> org.postgresql.util.PSQLException: ERROR: Invalid OGC WKT (does not<br>
><br>
> start with P,L,M or G), which doesnt really make much sense to me.<br>
><br>
><br>
> I try to put single quotes around each one like:<br>
><br>
> String tempString = "'" + cells[cellIndex].getShape().getWkt() + "'";<br>
><br>
> and i get the error that tempString as a column does not exist.<br>
><br>
> There also seems to be some confusion on the postgis message boards<br>
> whether a single quote is even needed. I was never able to come to a<br>
> definite conclusion.<br>
><br>
><br>
> I would appreciate help to all who could help. ive tried everything that<br>
> i know at this point. Thanks a bunch in advance!<br>
><br>
> CS<br>
><br>
><br>
><br>
> _______________________________________________<br>
> postgis-users mailing list<br>
> <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
> <a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 3<br>
Date: Tue, 14 Sep 2010 19:49:25 -0700<br>
From: Kevin Neufeld <<a href="mailto:kneufeld@refractions.net">kneufeld@refractions.net</a>><br>
Subject: Re: [postgis-users] unioning a buffer - bug?<br>
To: PostGIS Users Discussion <<a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a>><br>
Message-ID: <<a href="mailto:4C903435.8030802@refractions.net">4C903435.8030802@refractions.net</a>><br>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"<br>
<br>
Interesting. Something sure sounds amiss. Are the results null? Is<br>
there anything usual occurring at the TopologyException location? Is<br>
your dataset large? Can you winnow it down to the few polygons that<br>
might be causing the problem (this may be just the polygons around the<br>
TopologyException location)? If so, you could paste the representation<br>
of the geometries in PasteBin or something so we can help you isolate<br>
the problem.<br>
<br>
Also, what version of GEOS do you have installed?<br>
SELECT PostGIS_Full_Version();<br>
<br>
Cheers,<br>
Kevin<br>
<br>
On 9/14/2010 6:03 AM, Lee wrote:<br>
> Hi Kevin,<br>
><br>
> I assumed I have no results because when I load one of the working<br>
> queries as a view (eg. select st_buffer(the_geom,0.1)) in QGIS, or in<br>
> ArcGIS, I see all my results as I would expect, but when I modify the<br>
> query to st_union(st_buffer()), all my parcels disappear and I have a<br>
> blank canvas.<br>
><br>
> Also, with st_isvalid(st_union(st_buffer(the_geom,0.1))) returning<br>
> null (neither t nor f) I guess I just assumed. Anyways, results for<br>
> your suggestions are inline, below.<br>
><br>
> Thanks for your help. Any further ideas?<br>
><br>
> Lee.<br>
> ------------------------------------------------------------------------<br>
> *From:* Kevin Neufeld <<a href="mailto:kneufeld@refractions.net">kneufeld@refractions.net</a>><br>
> *To:* <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
> *Sent:* Tue, September 14, 2010 12:12:46 AM<br>
> *Subject:* Re: [postgis-users] unioning a buffer - bug?<br>
><br>
> How are you determining you have no results?<br>
><br>
> Try:<br>
> CREATE TABLE results AS<br>
> SELECT st_union(st_buffer(the_geom,0.1)) as the_geom<br>
> FROM base.current_assessment_parcel;<br>
><br>
> NOTICE: TopologyException: found non-noded intersection between<br>
> 586714 4.95189e+006, 586714 4.95189e+006 and 586714 4.95189e+006,<br>
> 586739 4.9519e+006 586714 4.95189e+006<br>
> Query returned successfully with no result in 1078 ms.<br>
><br>
><br>
><br>
> SELECT count(*) FROM results;<br>
><br>
> 1<br>
><br>
> SELECT ST_Summary(the_geom) FROM results;<br>
><br>
> This returns blank.<br>
><br>
><br>
> (snip)<br>
><br>
> -- Kevin<br>
><br>
> On 9/13/2010 7:07 AM, Lee wrote:<br>
>> So after some googling I see similar problems, but no solutions posted.<br>
>><br>
>> I am trying to union a buffer, but the query is returning no<br>
>> results. Here is ultimately what I would like to achieve:<br>
>><br>
>> select st_union(st_buffer(the_geom,0.1)) as the_geom from<br>
>> base.current_assessment_parcel<br>
>><br>
>> Here are some troubleshooting steps I have taken to try narrow it down:<br>
>><br>
>> select st_isvalid(the_geom) a from base.current_assessment_parcel<br>
>> group by a<br>
>> TRUE<br>
>><br>
>> select st_isvalid(st_buffer(the_geom,0.1)) a from<br>
>> base.current_assessment_parcel group by a<br>
>> TRUE<br>
>><br>
>> select st_isvalid(st_union(the_geom)) from base.current_assessment_parcel<br>
>> TRUE<br>
>><br>
>> select st_isvalid(st_union(st_buffer(the_geom,0.1))) from<br>
>> base.current_assessment_parcel<br>
>> NOTICE: TopologyException: found non-noded intersection between<br>
>> 586714 4.95189e+006, 586714 4.95189e+006 and 586714 4.95189e+006,<br>
>> 586739 4.9519e+006 586714 4.95189e+006<br>
>> Total query runtime: 859 ms.<br>
>> 1 row retrieved.<br>
>> (returns blank record)<br>
>><br>
>> And just for fun<br>
>> select st_isvalid(st_buffer(st_union(the_geom),0.1)) a from<br>
>> base.current_assessment_parcel<br>
>> TRUE<br>
>><br>
>> I guess my next step would be to try the snap to grid functions, but<br>
>> the first query above should work, shouldn't it?<br>
>><br>
>> Any help appreciated. Thanks.<br>
>> Lee<br>
>><br>
>><br>
>> _______________________________________________<br>
>> postgis-users mailing list<br>
>> <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
>> <a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
>><br>
><br>
><br>
> _______________________________________________<br>
> postgis-users mailing list<br>
> <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
> <a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
><br>
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------------------------------<br>
<br>
Message: 4<br>
Date: Tue, 14 Sep 2010 20:20:36 -0700<br>
From: Kevin Neufeld <<a href="mailto:kneufeld@refractions.net">kneufeld@refractions.net</a>><br>
Subject: Re: [postgis-users] Inserting Geometries into PostGres<br>
database - ???<br>
To: PostGIS Users Discussion <<a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a>><br>
Message-ID: <<a href="mailto:4C903B84.4060903@refractions.net">4C903B84.4060903@refractions.net</a>><br>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>
<br>
Here's some sample code that illustrates how to programmatically read<br>
and write JTS Geometries from a PostGIS database in Java. The writing<br>
is done through a PreparedStatement to set the bounds of a SELECT<br>
query. It's the same concept if your PreparedStatement represents an<br>
INSERT statement instead.<br>
BTW, I would not recommend you use WKT. WKT will result in coordinate<br>
drifts due to loss of precision. If you're doing things<br>
programmatically, use WKB. However, if you're not concerned with<br>
precision loss, you can easily enough use pstmt.setString(1,<br>
myJTSPolygon.toString()) instead (and of course use ST_GeomFromText(?,<br>
<srid>) in the query). Stephen's inline solution should also work.<br>
<br>
<br>
<br>
// PostGIS and JTS<br>
Class.forName("org.postgresql.Driver");<br>
Connection conn =<br>
DriverManager.getConnection("jdbc:postgresql://...");<br>
<br>
WKBReader wkbReader = new WKBReader();<br>
WKBWriter wkbWriter = new WKBWriter();<br>
<br>
String query =<br>
"SELECT the_geom FROM my_spatial_table<br>
WHERE the_geom && ST_GeomFromWKB(?, 3005)");<br>
PreparedStatement pstmt = conn.prepareStatement(query);<br>
pstmt.setBytes(1, wkbWriter.write(myJTSPolygon);<br>
<br>
ResultSet rs = pstmt.executeQuery();<br>
while(rs.next) {<br>
Geometry g = wkbReader.read(WKBReader.hexToBytes(<br>
rs.getString(1)));<br>
...<br>
// Do stuff with Geometry<br>
}<br>
<br>
<br>
Hope this helps,<br>
Kevin<br>
<br>
On 9/14/2010 2:38 PM, Stephen Woodbridge wrote:<br>
> On 9/14/2010 5:12 PM, CS wrote:<br>
>> Hi all. I am having problems inserting a geometry type into a database.<br>
>> I am using postgres 8.4 and whatever the latest postgis there is(i<br>
>> forgot now). Linux with glassfish is the server environment.<br>
>><br>
>> I have seen multiple hardcoded examples about how to insert something in<br>
>> the VALUES clause but what if i have an array of polygons that cannot be<br>
>> hardcoded that is already determined? That is the coordinates and type<br>
>> of the shape is already decided. This lends to the question as to<br>
>> whether you can use a preparedStatement and setString to insert a<br>
>> geometry. This is what i need some help on.<br>
>><br>
>><br>
>> an example of a WKT for a certain cell that i have is:<br>
>><br>
>> POLYGON ((-90.406 31.07360133086052, -90.406 31.34423828125,<br>
>> -90.09073538749632 31.34423828125, -90.09073538749632 31.07360133086052,<br>
>> -90.406 31.07360133086052))<br>
>><br>
>> i want to be able to take this(as a string, if possible) and insert into<br>
>> the database using a prepared statement.<br>
>><br>
>><br>
>> PreparedStatement.setString(1, cells[cellIndex].getShape().getWkt());,<br>
>> where getWKT returns the string representation. Of course this doesnt<br>
>> work because the type of the column is a postgis geometry. So, again,<br>
>> how do you use a prepared statement to insert a WKT string<br>
>> representation?<br>
>><br>
>><br>
>> I have tried this:<br>
>><br>
>> String tempString = cells[cellIndex].getShape().getWkt();<br>
>> String parameterInsert = "insert into Cell(result, report, modified,<br>
>> cellid, missionid, shape) values (?, ?, ?, ?, ?,<br>
>> GeomFromText(tempString,4326))";<br>
><br>
> You might try something like:<br>
><br>
> String parameterInsert = "insert into Cell(result, report, modified,<br>
> cellid, missionid, shape) values (?, ?, ?, ?, ?,<br>
> GeomFromText(" + tempString + ",4326))";<br>
><br>
> And see if that works.<br>
><br>
> -Steve W<br>
><br>
>> where tempString would be the POLYGON above and i get the error:<br>
>> org.postgresql.util.PSQLException: ERROR: Invalid OGC WKT (does not<br>
>><br>
>> start with P,L,M or G), which doesnt really make much sense to me.<br>
>><br>
>><br>
>> I try to put single quotes around each one like:<br>
>><br>
>> String tempString = "'" + cells[cellIndex].getShape().getWkt() + "'";<br>
>><br>
>> and i get the error that tempString as a column does not exist.<br>
>><br>
>> There also seems to be some confusion on the postgis message boards<br>
>> whether a single quote is even needed. I was never able to come to a<br>
>> definite conclusion.<br>
>><br>
>><br>
>> I would appreciate help to all who could help. ive tried everything that<br>
>> i know at this point. Thanks a bunch in advance!<br>
>><br>
>> CS<br>
>><br>
>><br>
>><br>
>> _______________________________________________<br>
>> postgis-users mailing list<br>
>> <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
>> <a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
><br>
> _______________________________________________<br>
> postgis-users mailing list<br>
> <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
> <a href="http://postgis.refractions.net/mailman/listinfo/postgis-users" target="_blank">http://postgis.refractions.net/mailman/listinfo/postgis-users</a><br>
<br>
<br>
------------------------------<br>
<br>
Message: 5<br>
Date: Wed, 15 Sep 2010 10:45:14 +0530<br>
From: venkat <<a href="mailto:ven.tammineni@gmail.com">ven.tammineni@gmail.com</a>><br>
Subject: [postgis-users] ST_Split function is not working in PostGIS<br>
1.5<br>
To: <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
Message-ID:<br>
<<a href="mailto:AANLkTik7Ke8JCvTzxypgxA%2Bggx0ujcgPrKkf6K8TQuiT@mail.gmail.com">AANLkTik7Ke8JCvTzxypgxA+ggx0ujcgPrKkf6K8TQuiT@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Dear All,<br>
<br>
I am trying use ST_split function.when i use that function is saying that<br>
ST_Split function does not exit and error is below...<br>
<br>
ERROR: function st_split(geometry, geometry) does not exist<br>
LINE 1: SELECT ST_Split(circle, line)<br>
HINT: No function matches the given name and argument types. You might need<br>
to add explicit type casts.<br>
<br>
<br>
Please can you anyone guide me.. I am waiting fro your great response.<br>
<br>
Thanks and Regards,<br>
<br>
Ven<br>
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<br>
Message: 6<br>
Date: Wed, 15 Sep 2010 02:23:38 -0400<br>
From: "Paragon Corporation" <<a href="mailto:lr@pcorp.us">lr@pcorp.us</a>><br>
Subject: Re: [postgis-users] ST_Split function is not working in<br>
PostGIS 1.5<br>
To: "'PostGIS Users Discussion'"<br>
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<br>
Ven,<br>
<br>
Sorry ST_Split function does not exist in 1.5. ST_Split is a new function<br>
in PostGIS 2.0<br>
<a href="http://www.postgis.org/documentation/manual-svn/ST_Split.html" target="_blank">http://www.postgis.org/documentation/manual-svn/ST_Split.html</a><br>
See the Availability: 2.0.0 note?<br>
<br>
<br>
this is the list of new or changed functions in 2.0<br>
<a href="http://www.postgis.org/documentation/manual-svn/ch08.html#NewFunctions_2_0" target="_blank">http://www.postgis.org/documentation/manual-svn/ch08.html#NewFunctions_2_0</a><br>
<br>
Sorry,<br>
Regina<br>
<a href="http://www.postgis.us" target="_blank">http://www.postgis.us</a><br>
<br>
<br>
<br>
_____<br>
<br>
From: <a href="mailto:postgis-users-bounces@postgis.refractions.net">postgis-users-bounces@postgis.refractions.net</a><br>
[mailto:<a href="mailto:postgis-users-bounces@postgis.refractions.net">postgis-users-bounces@postgis.refractions.net</a>] On Behalf Of venkat<br>
Sent: Wednesday, September 15, 2010 1:15 AM<br>
To: <a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
Subject: [postgis-users] ST_Split function is not working in PostGIS 1.5<br>
<br>
<br>
Dear All,<br>
<br>
<br>
I am trying use ST_split function.when i use that function is saying that<br>
ST_Split function does not exit and error is below...<br>
<br>
<br>
ERROR: function st_split(geometry, geometry) does not exist<br>
LINE 1: SELECT ST_Split(circle, line)<br>
HINT: No function matches the given name and argument types. You might need<br>
to add explicit type casts.<br>
<br>
<br>
Please can you anyone guide me.. I am waiting fro your great response.<br>
<br>
Thanks and Regards,<br>
<br>
Ven<br>
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