PostgreSQL is an open source object-relational database system.

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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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3 views

PostGis without shp2pgsql

I recently reinstalled postgis on my pc, following these instructions link. The installation is successful, and for several days work using PostgreSQL and PostGIS without problems. Now, I need to ...
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6 views

ST_Split and looping problems PostGIS

I am a total PostGIS noob, and am having trouble understanding the finer points of SQL syntax. I am trying to take a large set of line data and clip it with a polygon. I then want to create a new ...
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1answer
5k views

Transforming from SRID 900913 to 4326 with PostGis

I have two Postgres tables with different SRIDs: 4326 and 900913. I want to convert the latter to 4326. I first changed the SRID using: Select UpdateGeometrySRID('table', 'geomcolumn', 4326). I ...
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2answers
34 views

How to populate a table with geom line? [on hold]

I have the coordinates of a lot of points in a table. In pgadmin I want to make a line that passes on these points. I already have my Coordinate point im my table. I want to make line with those ...
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10 views

pgRouting. pgr_ksp() returns -1 as id3

The documentation (http://docs.pgrouting.org/dev/src/ksp/doc/index.html) says that the result should be 0 for the last row. Is the same 0 than -1? I'm new on this. Thaks for the help.
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15 views

Update Statement in PostGIS ERROR

I am trying to update a column in PostGIS using information from a column in another table where they spatially intersect. I looked up how to do this on the PostgreSQL tutorial and I think that I ...
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1answer
190 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' ...
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19 views

Displaying measurements on a grid of the Earth

I'm developing an application where I need to draw the averaged results of some measurements on a map. Right now, I'm using Leaflet to draw the map with MapQuest/OpenStreetMap tiles, and have the ...
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2answers
130 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) ...
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4answers
4k views

Connecting to ArcGIS Desktop PostgreSQL database (running locally)

I know this is a total noob question but then again, when it comes to PostgreSQL I am a total noob... I have installed the OpenGeo suite on my computer, running Windows 7, 64-bit. I have ...
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1answer
525 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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1answer
46 views

Creating GeoJSON from Postgres

We are transitioning from Google Maps to Mapbox. Mapbox is a proponent of geoJSON and uses it extensively, so we are considering adopting it for all of our maps. An issue is the creation of the ...
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1answer
56 views

PostGIS - ST_Within or ST_Disjoint performance issues

I have a table of about 150,000 points in PostGIS with a spatial index and a SRID of 27700 (OS). I want to select the points that fall outside England and Wales. I have a multipolygon table with ...
4
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1answer
411 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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2answers
87 views

How to populate my table with data in excel format?

I have 160000 rows of data in Excel and I want to put them in my table in PostgreSQL. How can I import X,Y coordinates from my excel file to my table in postgresql?
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51 views

Postgresql trigger on a table that update a field

Depending on values on 2 fields A and B, I would like a field C to be updated or filled with a specific value. For example : create or replace function periode() returns trigger as $BODY$ begin IF A ...
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1answer
25 views

Use C# to display PostGIS data in ArcGIS Developer kit with arcgis-ogr plugin

I am trying to display data in ArcGIS Runtime Engine Developer kit 10.2.2 using OGRPlugin/OGRPlugin/ develop by Ragi Yaser Burhum on https://github.com/RBURHUM/arcgis-ogr . I am using this format but ...
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2k views

Which function for creating a POINT in PostGIS?

When defining a Point in PostGIS, when do you decide to use which of the following? ST_SetSRID(ST_MakePoint(lon,lat),4326) ST_SetSRID(ST_Point(long,lat),4326) ST_SetSRID(ST_GeomFromText('POINT(lon ...
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23 views

How to get elevation of a coordinate given a dtm file out of a PostGIS?

What would be the best way to get elevation of a coordinate out of a PostGIS database (SQL/plpgsql) given a GeoTIFF dtm file? Importing as PostGIS Raster (which seems more costly) and calling ...
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18 views

Trying to install PyGreSQL, receiving DLL load failed error

I am trying to install the PyGreSQL package into Python 2.7. I am running 32-bit Python on a 64-bit Windows 7 machine. The installer I am using is the file PyGreSQL-4.1.1.win32-py2.7.exe from here. ...
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1answer
79 views

PostgreSQL default values in QGIS 2.8.1

I have a problem with default values the are set in a PostgreSQL table. When I work on them in QGIS 2.8.1 and I save the layer, the default values were not computed, so the constraints block me. With ...
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9 views

php script with lat and long for postgresql

I would like to create a postgresql geodatabase able to display, with OL3, data entered through a php script. In the php script i indicated the two fields latitude and longitude data as numeric ...
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12 views

Use another schema than public in geoserver monitoring plugin

We want to use the Geoserver Monitoring Plugin, based on a PostgreSQL 9.3 database. It works fine except that the plugin create the tables request and request_resources in the public schema, while we ...
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1answer
20 views

how to fix this ERROR: Start vertex was not found

I am attempting to make an SQL selection but receive an error. My statement: SELECT * FROM network JOIN (SELECT * FROM shortest_path(' SELECT gid AS id, start_id::int4 AS source, end_id::int4 ...
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1answer
45 views

slow Openlayers with 270000 points

I have 270 000 points on a map. If you zoom out, the site hangs for a very long time and sometime the page just crash. I use Cartaro with Drupal. https://www.drupal.org/project/cartaro Cartaro is a ...
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3answers
3k views

Install the Pgadmin3 shapefile importer plugin on a Mac(10.8)?

I'm new to GIS related things and I'm setting up a Postgre/Postgis database for geospatial queries. I'd like to import various shapefiles into the database and I found that Pgadmin3 has a shapefile ...
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12 views

Query processing time for network table creation using pgRouting 1.05

I am trying to follow these steps for creation of a network table using pgRouting 1.05. In my case I have two road geometry tables, one is bangalore_road and the other is all_india_roads. Obviously ...
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1answer
22 views

problem in PostGIS Name of the system used for Points and how to get distance between to point?

I have started to work on a project in PostGIS. I have a table with a geometry points in which points saved like this : "010100000089F511C671C01E4162327E2A83545341" and I have translated this ...
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2answers
55 views

Neighbors within distance from every row

I have a research project of 180,000 entries and I need to calculate the number of neighbors (points from the same table) that exist within a 300 meter radius for each point. My method is very slow, ...
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1answer
62 views

How to improve ArcGIS Desktop 10.2.2 and Postgres 9.2 PostGIS geometry performance?

I'm experiencing sever performance issues on a polygon featureclass(PG_GEOMETRY) in a PostgreSQL 9.2 database from a 10.2.2 client. Even when zoomed to an area with 10-20 features within the extent. ...
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8 views

PSQL: Setting maxspeed to all highway tags having 'highway' text= NULL AND 'maxspeed' text = NULL?

Hello everyone, I am trying to create a procedure in postgresql using functions of postgis extensions where I can first search and find all the rows having an empty 'highway' tags AND ...
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1answer
15 views

OpenLayers WFS-T tinyows insert transaction: error GID value

I try to implement insertion of new point using Openlayers v2.13 saveStrategy calling tinyows which implements the WFS-T transaction; I use the example from ...
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15 views

Free tutorials for beginners in PostgreSQL, PostGIS and SQL? [duplicate]

I've been cruising youtube videos and various sites trying to pick up information on working with postgresql, postgis, and sql. I would love a few recommendations for quality tutorials and sites. ...
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2answers
152 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 ...
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1answer
27 views

Convert 2D coordinates from NAD83 to WGS84 using Postgis

I have a set of NAD83 coordinates that I need to convert to WGS84 coordinates. I am using postgis on an RDS. Specs for the box I am using from postgis_full_version(): POSTGIS="2.1.3 r12547" ...
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25 views

PostGIS extension on Debian not found: could not open extension control file

I'm trying to set up the PostGIS extensions on a Postgres 9.1 database on Debian Wheezy, but getting an error: =# create extension postgis; ERROR: could not open extension control file ...
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1answer
25 views

PG::UndefinedFunction: ERROR: operator does not exist: point = unknown

Recently, I developed a feature to save and fetch points(lat and lon) from DB. It is working fine on my local, but on production database it is giving error: PG::UndefinedFunction: ERROR: operator ...
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2answers
99 views

Determine which points are contained inside a given polygon

I have these database tables defined: CREATE TABLE regions ( id SERIAL PRIMARY KEY, name VARCHAR(150) NOT NULL ) CREATE TABLE region_points ( id SERIAL PRIMARY KEY, region_id SERIAL ...
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2answers
398 views

osm2pgsql error when import pbf for Nominatim DB

Good day to all, Am getting the following error when running utils/setup.php in nominatim 2.1: Reading in file: /storage/Library/geodata/africa-latest.osm.pbf Processing: Node(54854k 62.1k/s) ...
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1answer
24 views

UPDATE a value field for area of the geom and convert sq m to acres using cartodb

I'm trying to use the SQL commands in CartoDB to UPDATE a value field that shows total acres of the area of the_geom. My SQL is pretty poor/entry level and has some issues: UPDATE table_name SET ...
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0answers
24 views

Create table into PostgreSql from Geoserver SQL View query

I know how to connect Geoserver to PostgreSql and create SQL View queries with parameters from Geoserver, but ;it is possible to create a new table into PostgreSql from a Geoserver Sql View with ...
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2answers
221 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 ...
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1answer
53 views

Is there any topology handler in QGIS?

When importing autocad maps, sometimes topology will be chaos, this need to be amended. And when I add new topology in QGIS, how to save that to the postgreSQL? Is these functions included in QGIS or ...
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1answer
50 views

Importing shapefile into PostgreSQL/PostGIS?

enter image description hereI'm completely new to PostgreSQL and PostGIS. I finally got both installed and have the PostGIS extension installed. I'm running the PostGIS shapefile import manager. I ...
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1answer
25 views
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1answer
291 views

ERROR: Operation on two geometries with different SRIDs

I'm new when it comes to GIS and PostgreSQL. I have searched everywhere for the cause of this problem but I can't find the solution. I was following the documentation here First i created a table: ...
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1answer
40 views

How to reproject all geometries columns in a PostGIS schema

Is there's a way to reproject all geometries columns of a postgis schema given the same source SRID to the same destination SRID? Exemple : schema.table1 has 2 geometries columns geom and geom2 with ...
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2answers
120 views

Getting OSM maps in Equirectangular Projection via osm2pgsql

I'm trying to import some OSM data into psql as equirectangular projection using osm2pgsql with the following command: osm2pgsql -c -d osm -S /usr/local/share/osm2pgsql/default.style -l ...
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1answer
51 views

Database connection times - PostGreSQL vs Oracle (ArcSDE)

I have 2 SDE instances. Both have the same amount of data (2000 datasets both raster and vector). One is PostGreSQL 9.2 with ArcSDE 10.2.1 One is Oracle 11g with ArcSDE 10.2.1 So basically the ...