PostgreSQL is an open source object-relational database system.

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4
votes
3answers
60 views

How can I export data containing umlauts from PostGIS to shapefile, without losing the umlauts?

I am exporting my Finnish (Finland) data from PostGIS to esri shapefile. I am using the PostGIS Shapefile Import/Export Manager and I don't see any way to specify the encoding of the shapefile's ...
1
vote
1answer
139 views

Is there any readily available implementation of Mapserver (or Geoserver)- Postgres-Openlayers combination?

I am developing an web GIS for map data presentation for public. Is there any readily available implementation of Mapserver (or Geoserver)- Postgres-Openlayers combination or similar? More Details: ...
6
votes
2answers
261 views

Where can I find PostGIS error codes?

Using ST_Contains in where clause sometimes gives me error messages like ERROR: GEOSContains: TopologyException: side location conflict at 37.3706 55.7882 For now I can't guarantee validity for ...
0
votes
0answers
99 views

Polygon dynamic grid creation for a shape file

I have used QGIS Vector->ResearchTools-> Vector Grid to create a 1lat x 1 long grid for the landpolygon shape file (from osm). Now, I am interested in creating dynamic grid for the original ...
1
vote
1answer
190 views

Geoserver OSM data Imported via osm2pgsql - most efficient tables to use to style roads

The Osm2pgsql importer for OSM data to Postgres results in two tables for ways, one called planet_osm_roads and a second one called planet_osm_lines The Osm2pgsql documentation states that the ...
2
votes
0answers
29 views

Spatial query too slow to handle bigger OSM extracts

I'm trying to compute some statistics for OSM data using PostgreSQL 9.3.5 and PostGIS 2.1.4. I started with a small bavaria extract which I downloaded from Geofabrik. The db schema is the normal API ...
0
votes
1answer
25 views

How do I change the PostgreSQL data directory in the OpenGeo Suite 4.5?

I am using OpenGeo Suite and I would like to move the PostgreSQL databases files to a different drive than my operating system. The default location installed by OpenGeo Suite is in the ...
8
votes
1answer
547 views

How to view a 155 MB raster stored in PostGIS?

I am using the following command to load a raster into a postgres database: raster2pgsql -I -C -e -Y -F -s 3086 -I -C -M myraster.tif myraster -F -t 30x30 | psql -U postgres -d database -h localhost ...
2
votes
4answers
70 views

Postgis don't use spacial-index with st_intersects

I imported the data from openstreetmap using osm2pgsql and copied it another table structure. If I made a query for containing rows using st_intersects, st_contain or someone else, postgis don't use ...
0
votes
1answer
121 views

Importing recent NAVTEQ/HERE RDF Data into Postgres/Postgis

I am trying to import a recent version of navteq data into a postgres DBMS. I have downloaded the 2014Q2 version of the data from https://here.flexnetoperations.com as well as ...
1
vote
1answer
31 views

QGIS 2.6 how to prevent user to drop a postgis table

Does anyone know how to prevent user to drop a postgis table? I have a vector layer imported from a postgis2.0 database, and one of my users drop it accidently. Fortunate I had a backup, but i don't ...
1
vote
0answers
54 views

Using ArcMap 10.3 with PostgreSQL 9.3.x database and PostGIS 2.1.1?

I have a PostGIS database that we use for data storage. I would like to open this data in ArcMap instead of storing it in another format. In previous versions of ArcMap it has been possible to open ...
2
votes
1answer
466 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
1answer
19 views

Select Polygon Intersections Between Two Tables With No Common Key

I am new to geodatabase queries and cartodb. I am trying to write a SELECT query that will do the following. I have two tables. Table 1 contains congressional district polygons and info about ...
-1
votes
0answers
19 views

In need of PostgreSQL tutorial [on hold]

Is it me or it's quite hard to find some tutorials to learn PostgreSQL. To me, it's really hard to find anything that has a sample database with it.
0
votes
2answers
111 views

Enlisting all OpenStreetMap (OSM) street names for General Transit Feed Specification (GTFS) routes?

I have exported OpenStreetMap (OSM) data of a city to my local postgresql db using osm2pgsql. I would like to add the General Transit Feed Specification (GTFS) routes information (say bus routes) ...
-4
votes
1answer
21 views

Make connection from Postgresql to QGIS? [on hold]

I'm still new in QGIS. I want to add data from one layer to another layer in QGIS. How could I accomplish that?
1
vote
1answer
15 views

SELECT geometry FROM spaces WHERE geometry ARE WITHIN OR OVERLAP polygons FROM OTHER table

I've got two tables, one containing LINESTRINGs and one containing POLYGONEs. I would like to select all the LINESTRINGs that are containing within the outer boundary of all the POLYGONs combined. ...
5
votes
3answers
146 views

PostGis: Geometry from UTM text

I have plain data in a postgresql table which looks like this: ╔════╦═══════╦═════════════╦══════════════╦══════════╦═════════════════╗ ║ id ║ index ║ easting ║ northing ║ utm_zone ║ ...
4
votes
3answers
2k views

ArcGIS Server not showing map service? [on hold]

I have a map service enabled in my server and have kml and wms as well as mapping and feature access capabilities turned on. I can view the wms in qgis, I can veiw the kml in google earth. However ...
-2
votes
0answers
16 views

change database from SqlServer to Postgresql [on hold]

I work with GIS Server and Microsoft Sql Server database,Now I need to change my database to Postgresql.I do not know how I can do it.
2
votes
0answers
259 views

Unable to edit PostgreSQL/PostGIS layers in ArcMap 10.2.2

I am connected to the database, have added a layer, started edit session, but I am unable to edit the attributeeo table of said layer. ArcMap tells me that it is not an editable layer. When ...
3
votes
1answer
199 views

Get Multiple Shortest Path using PgRouting in One Query

I am trying to get multiple shortest path using A* Algorithm available in PgRouting. I referred Solution given by UnderDark ( Link of the Stakoverflow Post ) . But it is not giving me proper Output. ...
1
vote
1answer
194 views

How to calculate the track length of GPX files with PostGIS?

I am trying to calculate the length of a GPX track. The original GPS data looks like this: <?xml version='1.0' encoding='UTF-8' standalone='yes' ?> <gpx ...
0
votes
1answer
31 views

Get postal codes of a city in OSM via postgis/postgresql

So, I'm trying to get the postal codes of a city (polygon). Unfortunately, I never get consistent results with my code: SELECT a.name, b.tags->'postal_code' FROM planet_osm_polygon a JOIN ...
0
votes
0answers
20 views

Find closest points in routing network for a set of points to pick shortest route

I have the following WITH SQL Query which does select a set of filling stations along a route within the distance of 1000m. In the SQL statement I fetch 1 Point from the station and search the closest ...
6
votes
1answer
117 views

What controls the direction of TopoGeometry Linestrings?

In PostGIS, what if anything controls the direction that topogeometry LINESTRINGs will have when converted to geometry? It doesn't appear to be the order in which the edges are listed in the call to ...
0
votes
1answer
37 views

Finding lines of similar attribute with respect to nodes connected to its both Ends

I have line networks with node generated for Start and End Point . how to check if a line has correct attribute with respect to point created at its End. for instance FuID_Line = ABC_BDQ and Start ...
1
vote
1answer
150 views

SQL-query should return GeoJSON FeatureCollection

I'm trying to return a GeoJSON FeatureCollection object from a SQL-query with PostgreSQL 9.3 and PostGIS 2.1. This is my query so far: SELECT row_to_json(fc) AS p FROM (SELECT 'FeatureCollection' ...
0
votes
1answer
315 views

How to update/delete data from a datagridview?

I wanna be able to update/delete data from a datagridview, and when I do that of course the data in my PostgreSQL database should be edited too. So I've thought about giving the user the ability to ...
2
votes
4answers
182 views

Split lines into non-overlapping subsets based on points

Given a table with line geometry, and one or more points that are snapped to this line in a separate table, I would like to split each line with one or more intersecting points at each of the ...
2
votes
1answer
28 views

am I setting up data from google geocoding correctly for ST_DWithin search?

Sorry to ask a basic question, but I have not been able to find this laid out entirely anywhere. I am mostly relying on this SO post: What Spatial Reference System do I store Google Map's Lat/Lng ...
2
votes
2answers
219 views

Update/refresh edited PostGIS table in QGIS

I imported a PostGIS table (with geometry) from my PostgreSQL database as a layer in QGIS. Later, I edited the table using PostgreSQL UPDATE commands. Is there a way to quickly update (like a refresh ...
1
vote
1answer
52 views

How do I sum values that are geographically close to each other?

I have a dataset of Boko Harams rampage in Nigeria uploaded to CartoDB. I have columns like coordinates, dates, number of victims. Would it be possible to write a query that would sum the victims ...
1
vote
1answer
31 views

PostGIS returning a field one level higher in the Json

I have the following SQL on a PostGIS Database ($properties contains a list of fields, including osm_id) SELECT row_to_json(fc) FROM ( SELECT 'FeatureCollection' As type, ...
0
votes
0answers
9 views

Post and Reconcile buttons in versionig toolbar grayed out in Arcmap

I have a versioned GDB (Postgresql) and I have versions DEFAULT-> A -> B. Version A modifies two poly lines and version B modifies one of the two that is modified in version A. In ArcMap, even though ...
0
votes
0answers
29 views

QGIS Crash: Enter Credentials

just wondering if anyone has come up against this issue...in the office QGIS will come up with an 'Enter Credentials' box with 'Error: Too many clients already'. When you enter your username and ...
4
votes
4answers
719 views

What does the “service” box in the PostGIS connection dialog stand for?

Can sоmеbody explain me what to write in the "service" box when connecting to the local DB. QGIS Lisboa and Postgres are installed.
1
vote
0answers
41 views

SQL query works in PostgreSQL but not in GeoServer SQL View

I can't find a solution for this problem after a couple of hours of research. The query is: SELECT searchaddress('some string'); FETCH ALL IN mycursor; The function searchaddress returns a ...
4
votes
1answer
388 views

How can I make a Postgres/PostGIS ST_Distance_sphere query more efficient?

Within Postgres/PostGIS I have written an SQL query to get the closest distance for each element within a point coordinate table from a polyline table. The query comes back and works correctly, but ...
1
vote
1answer
157 views

Counting self intersections of linestring using PostGIS?

Is there a way of using PostgreSQL + PostGIS for finding the number of self intersections in a linestring? I have a linestring that goes forward but in circles, and I need to find the number of times ...
1
vote
1answer
42 views

how to query contour postgres db for elevation at a point using postgis

Is there a way to interpolate between these contour lines for a given point using postgis? Thanks. I've come up with the following query to gather the potential contour lines of interest: ...
2
votes
1answer
57 views

ST_INTERSECT of each element of two tables (polygons, lines)

Im new to postgis and trying to solve the following problem: I have two tables: 1. containing polygons 2. containing lines I need to find out the id of all polygons on each line and fill them in new ...
0
votes
1answer
348 views

PHP/MySQL, PostgreSQL spatial queries. Find a polygon that contains a coordinate? [closed]

I am building a non mapping javascript app and I am wanting to take a lat/long coordinate and query a MySQL table of polygons for the one that contains the point. I have looked into MySQL spatial ...
2
votes
4answers
1k views

Postgis shapefile loader 2.1 error: dbf file can not be opened

The .shp, .dbf and the rest of files are fine, I open them in QGIS, AGOL with no problem. In fact, I've tried 3 different layers, and get always the same error. Anyone can please help, as I really ...
2
votes
2answers
245 views

Using ST_split to split a line feature using nearby points

I have a line shapefile and a point shapefile, and the line has just one segment and its attribute table, the point shapefile has points near the line above, not on it and the close ...
0
votes
0answers
31 views

Routes through centroids and array functions

I have a table stopcentroids4 like in figure with the following fields: gid, routes, geom and i want to draw a line for each route that runs through centroids. In my code there is a mistake. ...
1
vote
2answers
180 views

Create shapefile from data PostGIS or KML using Java

I'm working on a geographic information system project, whose products form shapefiles. I am using the Java programming language and a PostGIS database. Is there a way to generate a shapefile from ...
1
vote
1answer
119 views

Force St_split() to return geometries in specific pattern

I'm Using PostGIS st_split() to split a polygon geometry by a linestring. Then I use st_dump() to return each of the splitted geometry and it is working fine. But the issue is I want to force ...
1
vote
2answers
141 views

adding geometries to a source, target table for multiple rows in pgrouting

I am having an issue trying to perform the pgr_dijkstra algorithm and getting back a line in my table for multiple rows. I have a table that has a columns of source, target node id's but I cannot ...