demo (#22) - tutorial foss4g_w12 - help me (#60) - Message List

Hello. I did not experience. I am writing thesis and find pgrouting very interesting. My goal is to get to calculate the minimum turns with the restrictions on openlayers but I have many problems. This of course depends on the fact that I have little knowledge.

For the moment I have 2 problems 1) To learn I am following the tutorial foss4g_w12_manual.pdf and I stopped to page 3. I do not know exactly how to perform the function Run Shortest Path Dijkstra query; If pgadmin3 (sql query) launch

SELECT * FROM shortest_path ( '

Gid as SELECT id,

Source

integer,

Target

integer,

Length

double precision as cost Victoria FROM ', 25793, 128002, false, false);

I have an error; ERROR: Start vertex was not found.

What's wrong?

2) I can not understand, even seeing the templates, how to 'link' openlayers to pgrouting

Thank you very much