1
vote
0answers
16 views

qGIS' Database Manager “Load as New Layer” Option Not Working

I'm trying to visualize some of my database queries on qGIS. I run a valid SQL query which returns a subset of my table that should be easily loaded as a layer. I then check "Load as new layer," ...
1
vote
1answer
32 views

ST_Union to merge tables containing lines?

I have to build a street network with Postgis that will be used with pgrouting. I have two tables: 1) the_network (182 lines): is a MULTILINESTRING table. Having columns road_name (varchar) / ...
0
votes
2answers
29 views

Can 'Source' and 'Target' in the roads table for routing be duplicate?

I am using pgr_ksp for finding multiple paths for single source and destination. I am wondering if 'source' and 'target' in a roads table are unique or not. because when i am doing routing on my road ...
1
vote
1answer
44 views

Routing in MS SQL 2012

I would like to perform routing in MS SQL 2012 similar to pgRouting. In pgRouting, I'd do the following steps to create a routable network: Create a database routing with template template_routing ...
0
votes
0answers
32 views

pgrouting shortestpathfromAtoB multiple pairs

I've got to solve a shortest path problem between multiple location pairs. E.g.: A to B C to D E to F etc. These pairs are stored in a table routing_basis like hkey; A; a.lat; a.lon; B; b.lat; b.lon ...
1
vote
1answer
66 views

pgrouting unexpected output

Thats my ways.shp file. I loaded this to PostgreSQL DB using PostGIS shape file loader. I ran pgr_anlayzeGraph() on it and found it had a lot of isolated segments. Next I ran pgr_nodeNetwork() to ...
0
votes
3answers
115 views

Faster routing algorithm on pgrouting

I have downloaded data for india as a dbf file then converted it using osm2po to make it routable but the problem is when i make any routing query it takes a lot of time around 300 seconds and these ...
0
votes
0answers
20 views

pgrouting - possible to find route through points rather than links? [duplicate]

Probably a daft question, but... I've been looking at using pgrouting to analyse paths between start/end points, but this analysis seems only to find routes through links (edges). Is there any way ...
0
votes
2answers
100 views

Unable to implement pgrouting(plugin) pgr_astar routing algorithm (shortest path) [duplicate]

I have been working on a project for indoor navigation. I made the floorplan of the building and road-map for routing purposes as shp files (using JOSM, making GeoJSON and then converting to shp file ...
0
votes
0answers
10 views

Prepare OSM file for PGROUTING use [duplicate]

Well I am new in the GIS World :p well I have a webGIS to realise and I want use OpenStreetMap. well the region I need wasn't vectorised so I modified it with JOSM ( Added Roads and buildings) and ...
0
votes
1answer
37 views

How to add Routing Table Query-Result on pgrouting?

I've followed the pgrouting latest workshop http://workshop.pgrouting.org. I wanted to know how to add the routing table query-result into my webpage directly after the route showed up? regards
0
votes
1answer
61 views

How to use osm2po to solve TSP

I've got a TSP to solve. I created a routable street graph using osm2po and imported the result to PostGIS. On my PG db I installed the pgrouting extension (over PGAdmin3 GUI --> right click ...
0
votes
1answer
63 views

Aiming to retrieve source and destination from Android, use pgrouting dijkstra to find shortest path and display it back on Android

I have created an Android application that will accept source and destination from the user. It then calls a php page which takes in the lattitude and longitude of the destination and the source. I am ...
-1
votes
1answer
87 views

Shortest Path Dijkstra

I would like to calculate the shortest path with dijkstra algorithm. sample query SELECT seq, id1 AS node, id2 AS edge, cost FROM pgr_dijkstra(' SELECT gid AS id, ...
1
vote
0answers
63 views

Traversing all possible road routes

I have created a topology from OSM data and would like to simulate a car driving every possible route along the map. The purpose is to "survey" the osm data as if in a car. My ultimate objective is to ...
0
votes
2answers
151 views

PostgreSQL function does not exist

I have PostgreSQL 9.2 with Pgrouting extension, but when I want to call a function(pgrouting) does not work. Id like to compute the shortest path between two point. SELECT gid, AsText(the_geom) AS ...
1
vote
0answers
79 views

pgrouting php problem “pg_fetch_result(): Unable to jump to row 0 on PostgreSQL result index 3”

I'm trying to build a simple routing web-app using pgrouting, followed some tutorial and the latest workshop. Because I'm using PostgreSQL 9.3(x64), Postgis 2.1.1, and pgrouting 2.0 so I did some ...
0
votes
0answers
39 views

Maximum number of points in a linestring?

I have a database (in Postgres/PostGIS) of GPS points recorded all over a rail network. The only data available is the lat/long coords of each point (no timestamps, links between points, or anything ...
1
vote
1answer
52 views

pgRouting and Openlayers error when insert controls variable

I've got another problem here :( I'm following the foss4g_w12 tutorial for building a pgRouting WebApp using openlayers, everything goes well until I added the following statement to my code: ...
0
votes
2answers
63 views

How to add other column into pgrouting query result in pgAdmin output pane?

I'm working on my final research project now and I'm a new user in pgrouting. Is there any chances to add another column name to display in the output pane? I'd like to add road name column so that I ...
0
votes
2answers
87 views

Problem Importing shapefile into postgresql with simple geometries

I have a Line Type shapefiles to be imported to postgis database on my postgresql, I'm using the SHP loader, I checked the "Generate simple geometries instead of MULTI Geometries" options so that the ...
1
vote
0answers
30 views

Create a single line from a resultset of line segments

How can I create a single line using the line segments geometry found in each row in resultset? I followed this tutorial: http://anitagraser.com/2013/07/06/pgrouting-2-0-for-windows-quick-guide/ I ...
0
votes
1answer
40 views

Issues with pgrouting workshop code in postgis 2.11/pgrouting 2.0

I'm having issues getting the pgrouting workshop to work on Postgresql 9.2/PostGIS 2.11 and pgrouting 2.0 on windows. How can I rewrite the following php/sql code and make it compatible with my ...
1
vote
1answer
92 views

Can anyone explain me the TSP pgRouting function?

I have no problems using Dijkstra or A* functions, but when I try to run TSP, I really don't know where to start. What I'm, trying is to get the 'best route' to link four points (typical TSP ...
1
vote
0answers
53 views

Complexity of A-star algorithm using pgRouting in a graph

I'm using the A-star algorithm in pgRouting. It uses the Manhattan distance as a heuristics ((|dx|+|dy|)/2). What would be the time complexity in a standard route network? Based on Why is the ...
1
vote
2answers
102 views

how to build topology with 3d linestring in pgrouting

I have some 3d linestrings in postgis database, and I want to use pgrouting for calculating shortest path with Dijkstra. when I execute "select pgr_createTopology('route2', 0.000001, 'geo3d', 'id');" ...
1
vote
0answers
73 views

pgRouting results to LINESTRING geometry type

I am doing some routing queries, using pgRouting's second version of pgr_trsp function. What I can't do effectively yet is storing the results. That is, I want to able to store in a table: either ...
0
votes
0answers
29 views

SQL questions testing pgRouting 2.0

Following the post:pgRouting 2.0 for Windows quick guide, cuz I have some problem with DB manager(here is the problem I posted:DB manager in QGIS 2.0), I skip DB manager and save the test shapefile, ...
2
votes
1answer
93 views

How can I move along a line (or path)?

Given a line (street, railroad, river...) I want to simulate a moviment inside this line. Example: See this picture: Say I'm in "Nagqu" and want to move to "Kunlunqial". In a time (t=0) I'm in ...
0
votes
0answers
25 views

Shortest path with varying costs

I have three different layers on different road types in three tables in PostGIS 2.0; freeways, main_roads, and small_roads. I want to calculate the shortest path with the pgRouting function ...
8
votes
2answers
145 views

Feeder bus service

First of all, a little background. I work for a regional transit agency. We are making a "diagnostic" about our feeder bus service. We'd like to know what proportion of our users could take the bus ...
2
votes
1answer
211 views

Create isochrone from multiple start points

I want to create an isochrone. For this I could use the pgr_drivingDistance function with pgRouting (http://docs.pgrouting.org/dev/src/driving_distance/doc/index.html) but it only takes one start ...
1
vote
2answers
110 views

How to create a network from nodes and boundaries?

I have a table of nodes (points) and i wish to route between the points. Its my understanding that i first need to build a pgrouting compatible topology (graph ?) that connects all the nodes using ...
0
votes
0answers
49 views

How to avoid intersection in pgRouting

I'm a newbie in pgrouting. I want to create a web-app with routing function. I want to ask how to avoid a road intersection with pgRouting? For example, there are some traffic jams happened in several ...
0
votes
0answers
54 views

osm2pgrouting can't get ways.the_geom srid

When I try to launch osm2pgrouting osm2pgrouting -file ~/Téléchargements/mayotte-latest.osm -conf /usr/share/osm2pgrouting/mapconfig.xml -dbname routing -user gisuser -passwd fred1490 -clean I get ...
0
votes
3answers
136 views

What is gid in OpenStreetMap data model?

I'm using an old code written by an ex-fellow and I wonder what is GID in OSM? The gid is basically used everywhere. The project uses PostGIS and PgRouting. Any pointers to that? I know this is a ...
0
votes
1answer
110 views

Using pgr_drivingDistance with large ids

I have little experience with postgres and none with pgrouting. I'm trying to use the pgr_drivingDistance function with Open Street Map data (generated through osm2po), but whenever I run my query: ...
1
vote
1answer
141 views

Why does Driving distance of pgRouting return disconnected results?

I am trying the driving distance function of pgRouting 2.0 beta, with an extract of OSM data. The problem i have is illustrated on the following image : On this picture i try to get all the ways ...
0
votes
1answer
73 views

create node ids with a multilinestring

I've got to make a route with my multilinestring table "routebus", but I can't create the node ids... maybe the fact that it's a multilinestring is the problem, but I really don't know how to solve ...
0
votes
0answers
742 views

How to install PostGIS and pgrouting on Windows if Stack Builder fails to connect?

I know this has probably been covered and that there are plenty of guides out there, but for the life of me I cannot get pgrouting installed. All guides/how-tos are different or assume prior ...
0
votes
1answer
137 views

pgrouting 2 pgr_createTopology not populating source and target field

I trying to integrate pgrouting 2.x. I am now using pgrouting 1.x. In version 1 I used assign_vertex_id. It already dropped in version 2 and became pgr_createTopology function SELECT ...
0
votes
2answers
197 views

PostGIS ERROR: function x(geometry) does not exist

I am using the following postgis query for updating a pgrouting table from my custom road data. In the x(ST_StartPoint(part_geom)) as x1, line its returning an error mentioned ERROR: function ...
0
votes
1answer
270 views

SELECT assign_vertex_id('ways', 0.00001, 'the_geom', 'gid'); not work

I'm using using OSgeo 6.5 dvd and studing pgrouting workshop (link) for get shortest path. I created network topology call "pgrouting - workshop". There are three commands to execute in section 5.2 ...
3
votes
2answers
291 views

Create a network topology for pgrouting with grade separation

I have built a network using Ordnance Survey's ITN data and I can solve routes across the network. What I need is to build in grade separation topology for overpasses and underpasses on the network so ...
1
vote
1answer
109 views

Pgrouting - Networking

my problem is regarding routing. I have a network based on bicycle graph links (SRID: 4326), with bidirected and directed ways. I want to give the user the functionality to draw a route (shortest ...
0
votes
0answers
20 views

How to find all possible paths by Postgis / Pgrout [duplicate]

There are functions available to find the shortest paths in Postgis / Pgrouting extension. But is it possible to find all the possible paths between two points/nodes ? Is there any such function ...
0
votes
0answers
58 views

How to use python to loop through all possible results in postgresql?

I use driving_distance function in pgRouting to work with my river network. There are 12 vertices in my river network, and I want to get the distance between all of these 12 vertices, starting from ...
0
votes
0answers
79 views

Shooting star algorithm in postgres 8.4 and postgis1.4 showing fatal error and remaining are working fine

When I try to run this shooting star algorithm, the postgis suddenly loosing connection to postgres and showing error no connection to server SELECT * FROM shortest_path_shooting_star(' SELECT gid ...
1
vote
1answer
147 views

Win7 Senior users_Which pgRouting and postGIS versions are stable with postgreSQL8.4?

I'm working on a postgreSQL ,postGIS and pgRouting project on Windows 7 I need to work on a stable version (no time for risks), and I can see that many people are asking the same question many ...
2
votes
1answer
331 views

How to install multiple versions of postgres in same os windows 7 64-bit?

I have already installed PostGIS along with opengeosuite and it is the latest version. Now I want to run pgrouting but the latest stable version does not compatible to the latest postgres versions. ...