PostgreSQL is an open source object-relational database system.

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PHP examples to replicate FeatureServer capabilities

I used FeatureServer before and I liked it. The only thing I didn't like, though, is that it needs some other dependencies to work. That's why I want to try PHP instead. I know that there are already ...
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40 views

How to count the number of coordinates within x meters grouping by distinct ids?

I have a table "items" of about 1 million rows and 40.000 distinct ids like the following: idx | id | point | lat | lon | the_geom 1 | 1 | 76 | 51.463388 | -0.16869856 | 0101000020E... 2 | 1 | 53 | ...
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1answer
100 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 ...
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2answers
919 views

Convert KML to shapefile without losing attribute data

So I want to convert KML files to SHP shapefiles to load it onto PostGIS. Currently I'm using ogr2ogr to do the conversion for me, but it wipes out all the attribute data. How do i preserve this ...
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1answer
27 views

PostGIS - How to do ST_UNION on each feature of a geojson FeatureCollection

I have a simple geoJSON featureCollection composed of 2 features: featureCollection = {u'type': u'FeatureCollection', u'features': [{u'geometry': {u'type': `u'MultiPolygon', u'coordinates': ...
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1answer
28 views

Display data from geoserver on click map with openlayers

I tried to display data with popup from Geoserver or Postgres to my map, but it dosen't work at all. Can anyone please help me? I used this code: function Info(e) { if ...
2
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1answer
26 views

Error in installing PostGIS 1.5?

I am installing PostGIS 1.5. After giving the command ./configure, it is showing that: pQserverversion in -lpq not found. configure: error: could not find libpq. What does it mean? I am ...
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1answer
30 views

Error while installing PostGIS 1.5

After giving the command ./configure, it is showing that: pQserverversion in -lpq not found. configure: error: could not find libpq. What does it mean? I am using Red hat Linux (32 bit) version ...
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1answer
172 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. ...
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0answers
31 views

Get a single cluster from cloud of points with maximum diameter in postgis

I have on the order of 2M Geometry Collections with N (median: 2, stddev: 6.6, 75th: 6, 95th: 21) Point objects (repeated points allowed and important) in a PostGIS table. I want to identify clusters ...
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1answer
44 views

What date was a table loaded into PostGIS

Is it possible to find out the date a table was loaded into a PostGIS schema using PgAdmin3? The tables are usually supplied from varying external sources.
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1answer
364 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 ...
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2answers
79 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) ...
3
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1answer
98 views

Debugging ogr2ogr “AddGeometryColumn failed” and “Terminating translation prematurely after failed translation of layer”

As noted in the title, I'm getting the following error: ERROR 1: AddGeometryColumn failed for layer pretty_polys, layer creation has failed. ERROR 1: Terminating translation prematurely after failed ...
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0answers
48 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 ...
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1answer
511 views

generate height data from DTED maps

I have 16 DTED maps of (1 degree x 1 degree). I have to generate combined height matrix of maximum 4 (1 degree x 1 degree) DTED maps in my C++ application. Can someone suggest to me which open source ...
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1answer
141 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 ...
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1answer
100 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: ...
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1answer
18 views

Display data from postgresql on click map

I work with openlayers and geoserver. I'm searching for code that when I click on a point of a layer on the map, a popup window appears that contains information from the database (postgres) for this ...
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0answers
18 views

psql schema error while importing a table [closed]

I am trying to create a table from a shape file and import it into my postgis database. I am using pgadmin3 and postgresql 9.3 on Ubuntu 14.04. I have a database postgis_test and enabled postgis with ...
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1answer
96 views

Connection property set error on registering PostgreSQL geodatabase with ArcGIS for Server?

We're in the middle of a migrating process. We've imported a geodatabase on a new Linux machine and we're trying to publish some map services to this new ArcGIS Server (that resides on the same ...
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0answers
26 views

How to install postgis extension using an existent version on postgresql on OSX 10.9.4

I'm trying to install postgis using my existent version of postgresql. I tried doing: brew install postgis. But I'm getting the following error trying run create extension postgis; query ...
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1answer
130 views

Why is ArcMap leaving connections “<IDLE> in transaction”?

The TL;DR version: When you use ArcMap Query Layers to access a PostgreSQL table, ArcMap's database connections are almost always sitting idle in unclosed transactions. Why would this be? I have ...
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0answers
36 views

Limited number of entities exported with ogr2ogr?

I generate shapefiles with a php script that launches ogr2ogr commands. The ogr2ogr commands look like : "C:\OSGeo4W64\bin\ogr2ogr.exe" --config PGCLIENTENCODING LATIN1 -overwrite -f "ESRI Shapefile" ...
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1answer
41 views

Copy tables from one server to another in PostgreSQL

I am trying to copy a number of tables from one server to another using PostgreSQL as part of reorganising our data structure. I am pretty new to PostgreSQL so haven't much experience with it. Is ...
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1answer
46 views

Polygon from line creation problem

I have a problem transforming a linestring into a polygon. The error is: ERROR: lwpoly_from_lwlines: shell must be closed So I checked but firstpoint and endpoint are the same. I tried to use ...
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1answer
46 views

Calculate shortest path between each lat/lon point in one table and each lan/lon point in another in Postgresql

I have two tables, both of them have only 2 columns. The first one contain only latitude and longitude coordinates of my source points and the other one only latitude and longitude coordinates of my ...
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3answers
96 views

What Open Source Packages are available to provide routing

I am looking for ways to validate mileage charged by our contractors. They are paid from a central location to a customer, and then from the customer to a drop off location. I use QGIS for a bunch ...
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1answer
27 views

Minimum Information to be kept on importing OSM data to use it for creating random start and ent points

I want to only import the minimum of data from OpenStreetMap, to be able to distribute random start and end points for a simulation in administrative areas in germany. I found this file ...
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1answer
561 views

Having trouble connecting QGIS with postgres database with postgis extension

I am working on Ubuntu Precise with postgresql version 9.3 and postgis 2.0. After initially starting my postgres database and eventually getting permission errors that would prevent postgres from ...
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1answer
38 views

PostGIS - ST_Difference query returns a dissolved result

I am using the ST_Difference to erase multipolygon feature by a mask. However, the query returns a dssolved multipolygon. The query is the following: '''SELECT ST_AsGeoJSON(ST_Collect(geom))::json ...
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43 views

How to load style from postgresql?

Is there any way to load a postgresql style for a vector layer using python? There is a function: loadNamedStyleFromDb (const QString &db, const QString &theURI, QString &qml).Does it ...
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0answers
25 views

Pgrouting, pgr_dijkstra function error

I'm starting to use the Pgrouting function on my database Postgresl. I have the table of links (id, source, target, cost) which contains the set of edges of my graph. I want to calculate the shortest ...
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1answer
42 views

Find nearest distinct features to a point

I am trying to select a single distinct features closest to an XY point in PostGIS. So I can find a single record for each distinct code by using: Select Distinct ON (code) * FROM table; Which ...
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1answer
265 views

Adding osm data to Postgres via Osm2pgsql : duplicate key value violates unique constraint

I'm trying to import osm global world data into a database created in postgreSQL but after a while of processing, I've got this error : Reading in file: E:\planet-latest.osm\planet-latest.osm ...
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1answer
42 views

Installed PostGIS extension not listed for database

I have a PostgreSQL database with the PostGIS extension enabled. I know that this extension is enabled, since I am using PostGIS functions, and I can actually see the PostGIS functions. However, ...
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0answers
21 views

Performance issues Tilemill with PostgreSQL and large datasets

I have a Tilemill project the size of europe. I developed my style-sheet by using a smaller dataset (size auf Austria) and everything was perfect. But now I did apply the same styles to my big europe ...
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1answer
40 views

Postgres Performance with Radius Searches

Im porting an application from mysql to postgres, and have several tables with 500k+ rows in each of geo points (lat, lon). In mysql i used a bounding box query with haversine to select rows within a ...
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23 views

insert row into postgis query table in QGIS

I find I am using QGIS (2.4) more and more as a client for PostGIS database tables with geometry, but also for tables without geometry, partly because it's good just to use the one application and ...
1
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1answer
86 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 ...
4
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1answer
321 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 ...
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1answer
248 views

Python Postgres Multiprocessing speed increase

I'm trying to speed up my PostGIS queries using multiprocessing. My current setup is using python and psycopg2 such as below. Although this has given a speed increase, it still seems like there are ...
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2answers
57 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
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1answer
42 views

Python script fails on stand alone but works in ArcMap as a toolbox

I have a fresh install of ArcGIS Server and ArcGIS for Desktop both 10.2, latest patches applied. The data is served in this application from a PostgresSQL enterprise geodatabase. The problem is that ...
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1answer
211 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 ...
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1answer
96 views

Create shp file from data postgis / kml using java

I'm working on a geographic information system project, whose products form shp file. I am using java language, and PostGIS database. Is there a way to generate a shp file from PostGIS or kml using ...
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1answer
349 views

How to query OSM for all beaches facing west? - QGIS preferred

I want to identify all beaches on this planet (or a given subset of it) that are facing westwards (+/- 20-30 degrees). My idea is to use OSM as the data source. Extracting all polygons that have the ...
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1answer
42 views

where styles from QGIS are saved in PostgreSQl

I can save style of a layer in DB PostgreSQL. But where it is stored in Postgres? How can I found It?
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3answers
70 views

postgresql export database with command or pgAdmin III

I want to export my postgresql db with pgadmin. I search all of its GUI, I also searched the web and I don't find some sueful information. I know how to import the db into postgresql: create a db with ...
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1answer
53 views

SQL query to have a complete geojson feature from PostGIS

I would like to get a geojson feature with properties from PostGIS. I have found an example to have a feature collection but I can't make it works for just a feature. so far I tryed to modify the ...