Comments on: Build your own routing solution http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/ Not another GIS blog Mon, 13 Oct 2008 23:18:58 +0000 http://wordpress.org/?v=2.6 By: Dorian http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-22702 Dorian Fri, 13 Jun 2008 09:34:01 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-22702 I found the solution: You will have to modify dijkstra.c and add the following: #ifdef PG_MODULE_MAGIC PG_MODULE_MAGIC; #endif after the include section. Then reinstall the pgdijkstra by executing sudo make install. Finally, restart the postgresql server. (yes, i saw you are using the windows version and i am not sure if this appy for windows as well, but... good luck!) I found the solution:

You will have to modify dijkstra.c and add the following:

#ifdef PG_MODULE_MAGIC
PG_MODULE_MAGIC;
#endif

after the include section. Then reinstall the pgdijkstra by executing sudo make install. Finally, restart the postgresql server.

(yes, i saw you are using the windows version and i am not sure if this appy for windows as well, but… good luck!)

]]> By: Dorian http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-22701 Dorian Fri, 13 Jun 2008 09:14:58 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-22701 Hi! Does anybody solved the "missing magic block" error? Thanks! Hi!

Does anybody solved the “missing magic block” error?

Thanks!

]]> By: Ivan http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-22693 Ivan Wed, 30 Apr 2008 09:44:02 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-22693 I get an error when calling create_graph_tables; ERROR: duplicate key value violates unique constraint "roads_edges_source_key" CONTEXT: SQL statement "INSERT INTO roads_edges (id, source, target) VALUES (1393, '1550', '91')" PL/pgSQL function "create_graph_tables" line 27 at EXECUTE statement I get an error when calling create_graph_tables;
ERROR: duplicate key value violates unique constraint “roads_edges_source_key”
CONTEXT: SQL statement “INSERT INTO roads_edges (id, source, target) VALUES (1393, ‘1550′, ‘91′)”
PL/pgSQL function “create_graph_tables” line 27 at EXECUTE statement

]]> By: nishith http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-22679 nishith Wed, 02 Apr 2008 10:23:13 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-22679 hi all, The error about magic module ocurs in my case too. psql:c:/program files/PostgreSQL/pgdijkstra/dijkstra.sql:32: ERROR: incompatible library “C:/Program Files/PostgreSQL/8.2/lib/libdijkstra.dll”: missing magic block HINT: Extension libraries are required to use the PG_MODULE_MAGIC macro. Can someone tell me what are the extension libraries and if it is the .dll we have it in the postgres installation's \lib dir already. thanks for any help in advance nishith hi all,
The error about magic module ocurs in my case too.

psql:c:/program files/PostgreSQL/pgdijkstra/dijkstra.sql:32: ERROR: incompatible library “C:/Program Files/PostgreSQL/8.2/lib/libdijkstra.dll”: missing magic block
HINT: Extension libraries are required to use the PG_MODULE_MAGIC macro.

Can someone tell me what are the extension libraries and if it is the .dll we have it in the postgres installation’s \lib dir already.

thanks for any help in advance
nishith

]]> By: Kusum http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-22674 Kusum Wed, 26 Mar 2008 12:33:19 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-22674 Hii All I read the blog in Build your own routing solution But there is a problem when i do that ,i get an error on exectuion of dijkstra.sql. i get an error as mentioned by robin also above C:\Program Files\PostgreSQL\8.2\bin>psql -U robin roads -f “c:\program files\ PostgreSQL\pgdijkstra\dijkstra.sql” CREATE TYPE psql:c:/program files/PostgreSQL/pgdijkstra/dijkstra.sql:32: ERROR: incompatible library “C:/Program Files/PostgreSQL/8.2/lib/libdijkstra.dll”: missing magic block HINT: Extension libraries are required to use the PG_MODULE_MAGIC macro. CREATE FUNCTION CREATE FUNCTION CREATE FUNCTION Please reply if you have found any resolution Regards Kusum Hii All
I read the blog in Build your own routing solution
But there is a problem when i do that ,i get an error on exectuion of dijkstra.sql.
i get an error as mentioned by robin also above

C:\Program Files\PostgreSQL\8.2\bin>psql -U robin roads -f “c:\program files\
PostgreSQL\pgdijkstra\dijkstra.sql”
CREATE TYPE
psql:c:/program files/PostgreSQL/pgdijkstra/dijkstra.sql:32: ERROR: incompatible library “C:/Program Files/PostgreSQL/8.2/lib/libdijkstra.dll”: missing magic block
HINT: Extension libraries are required to use the PG_MODULE_MAGIC macro.
CREATE FUNCTION
CREATE FUNCTION
CREATE FUNCTION

Please reply if you have found any resolution

Regards

Kusum

]]> By: Free Software Downloads http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-19950 Free Software Downloads Thu, 11 Oct 2007 18:29:56 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-19950 <strong>Free Software Downloads...</strong> I couldn't understand some parts of this article, but it sounds interesting... Free Software Downloads…

I couldn’t understand some parts of this article, but it sounds interesting…

]]> By: Software Development Guide http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-19944 Software Development Guide Thu, 11 Oct 2007 09:18:33 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-19944 <strong>Software Development Guide...</strong> I couldn't understand some parts of this article, but it sounds interesting... Software Development Guide…

I couldn’t understand some parts of this article, but it sounds interesting…

]]> By: Robin http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-17691 Robin Thu, 28 Jun 2007 05:02:36 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-17691 hi, I have been trying to get the above implementation to work but i am getting the following error at step 6: C:\Program Files\PostgreSQL\8.2\bin>psql -U robin roads -f "c:\program files\ PostgreSQL\pgdijkstra\dijkstra.sql" CREATE TYPE psql:c:/program files/PostgreSQL/pgdijkstra/dijkstra.sql:32: ERROR: incompatible library "C:/Program Files/PostgreSQL/8.2/lib/libdijkstra.dll": missing magic block HINT: Extension libraries are required to use the PG_MODULE_MAGIC macro. CREATE FUNCTION CREATE FUNCTION CREATE FUNCTION At the moment I have PostgreSQL 8.2 and the pgdijkstra package and nothing else. Am i missing anything? Can someone who has successfully implemented the algorithm please post all the steps and software used or email me at robinojha@gmail.com. thanks in advance, Robin hi,

I have been trying to get the above implementation to work but i am getting the following error at step 6:

C:\Program Files\PostgreSQL\8.2\bin>psql -U robin roads -f “c:\program files\
PostgreSQL\pgdijkstra\dijkstra.sql”
CREATE TYPE
psql:c:/program files/PostgreSQL/pgdijkstra/dijkstra.sql:32: ERROR: incompatible library “C:/Program Files/PostgreSQL/8.2/lib/libdijkstra.dll”: missing magic block
HINT: Extension libraries are required to use the PG_MODULE_MAGIC macro.
CREATE FUNCTION
CREATE FUNCTION
CREATE FUNCTION

At the moment I have PostgreSQL 8.2 and the pgdijkstra package and nothing else. Am i missing anything?

Can someone who has successfully implemented the algorithm please post all the steps and software used or email me at robinojha@gmail.com.

thanks in advance,
Robin

]]> By: Schalk http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-16116 Schalk Tue, 22 May 2007 13:49:35 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-16116 Actual solution :-] Give edges table an alias (note alias e) in update_cost_from_distance function: EXECUTE 'UPDATE ' || quote_ident(geom_table) || '_edges e SET cost = (SELECT sum( length( g.the_geom ) ) FROM ' || quote_ident(geom_table) || ' g WHERE g.edge_id = e.id GROUP BY e.id)'; Actual solution :-]

Give edges table an alias (note alias e) in update_cost_from_distance function:

EXECUTE ‘UPDATE ‘ || quote_ident(geom_table) ||
‘_edges e SET cost = (SELECT sum( length( g.the_geom ) ) FROM ‘ ||
quote_ident(geom_table) ||
‘ g WHERE g.edge_id = e.id GROUP BY e.id)’;

]]> By: Schalk http://blog.webmapper.com.au/2005/12/14/build-your-own-routing-solution/#comment-16106 Schalk Tue, 22 May 2007 08:26:07 +0000 http://chris.narx.net/2005/12/14/build-your-own-routing-solution/#comment-16106 My mistake: My shapefile had 'gid' as id column and not 'id'. Replaced id with gid in update_cost_from_distance function. Cost column in edges table is now correct. My mistake: My shapefile had ‘gid’ as id column and not ‘id’. Replaced id with gid in update_cost_from_distance function. Cost column in edges table is now correct.

]]>