PostgreSQL is an open source object-relational database system.

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57 views

Get list of all tables in CartoDB account with SQL statement?

How can I get a list of all available tables in my own authenticated CartoDB account with a SQL statement? This returns null: SELECT table_name as t FROM information_schema.tables WHERE table_schema ...
2
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2answers
99 views

How to get the data type of each column from a postgis table

I need to get the column data types of all columns in a table, including the geometry types. What I wanted to know is if there is a function or SQL that gives something like this: column_name | ...
4
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0answers
51 views

Compute visibility graph on sphere

I have a PostGIS table with some polygons (stored using the geography data type). They represent regions on a spherical earth. For each pair of vertices chosen from among all the polygons, I want to ...
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2answers
153 views

Searching planet_osm_point by longitude and latitude

I used osm2pgsql to import data into my PostgreSQL database and it put gave me the following 4 tables, planet_osm_point, planet_osm_line, planet_osm_polygon and planet_osm_roads. I have looked at ...
2
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1answer
34 views

Only Draw Geometric Objects Above 8th Parallel North

I have many geometric objects (in both SRID:4326 - the_geom - and SRID:3857 - the_web_geom - in PostGIS extension tables of PostgreSQL), including country boundaries, for the country of Ghana and I ...
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1answer
37 views

Show raster data in WEB

I have downloaded Landsat8 image and use matlab to processing temperature and vegetation. Then I insert data into PostGIS. I used QGIS to display the results but i want show in web. How to display the ...
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0answers
50 views

Focal Mean of neighbors using ST_DWithin on points in PostGIS

I'm trying to calculate focal means on a grid of points in PostGIS. I know that a raster calculation would be more efficient, but I only need to run the algorithm once to get the data, so I don't ...
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2answers
63 views

How can I speed up these queries

I am trying to make some calculations using PostGIS and PostgreSQL. There are 3 important tables : wbn, wgo and wvb. These tables have about 500.000 objects in them (geometries). The problem is that ...
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36 views

PostGIS 3D Extrude function

I selected buildings from OSM (which represents my city). I insterted a new column 'height' and I filled with a random number exactly number 2, so every building have 2metres altitude. Buildings are ...
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1answer
36 views

How to get a distinct pair of column values based on minimum of another (computed) column?

I have two tables with point geo data, one (sfc_obs) with weather stations (names), one (smos_grid) with satellite pixels (dggs), and I'm trying to find which dgg is closest to each name using ...
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2answers
95 views

What index to use in this situation

I am working with 3 tables with 3 x 500 000 rows. There is one column that gives each object a unique ID (UIDN), there also is a column with the geom data (the_geom). There also are some other columns ...
3
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1answer
79 views

MS SQL Server 2012 to Postgresql

How to use MS SQL Server 2012 spatial database in postgresql using foreign data wrapper?
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0answers
142 views

Raster slightly displaced after exporting from PostGIS database

With the following queries I've exported a raster (GTiff) from my postgis database: 1.Creating a large object: WITH buffer AS ( SELECT id, ST_Buffer(geom,50) AS geom FROM ...
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1answer
73 views

3D functions with SFCGAL in PostGIS

I have this setup: "POSTGIS="2.1.2 r12389" GEOS="3.3.8-CAPI-1.7.8" PROJ="Rel. 4.8.0, 6 March 2012" GDAL="GDAL 1.9.2, released 2012/10/08" LIBXML="2.7.8" LIBJSON="UNKNOWN" TOPOLOGY RASTER" on ...
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2answers
86 views

What is the best way to take a WKB value in SQL Server Management Studio and create a PostGIS geometry in PGAdmin III?

Normally, I would just use WKT strings but I'm investigating some possible geometry weirdness with the Text methods in SQL Server. I would like to copy/paste the WKB values from the SQL Server ...
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1answer
214 views

How to save a google map direction into a postgresql/postgis database?

I have taken a direction(route) from google map. Can I save this resultant direction/path/route to my postgresql/postgis database? How?
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2answers
57 views

Do I still have to use a template DB for PostGIS?

createdb mydb -T template_postgis Is this -T template_postgis still necessary in new versions of PostGIS? I never saw this db being different, it always has those 3 sql files you run there. Is this ...
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0answers
81 views

Postgresql JDBC Table Valued Parameters

MSSQL has a great feature called Table Valued Parameters. It allows you to pass a table of a custom data to stored procedures and functions. I was wondering what is the equivalent , if exists, in ...
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1answer
56 views

convert XML to PostgreSQL using MATLAB

In a weeks time I should be able to transfer the GIS data provided in the XML format to PostgreSQL database. I have prepared the PostgreSQL database (empty) and looking at Matlab scripts. (I am on ...
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0answers
40 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," ...
2
votes
1answer
67 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 ...
5
votes
1answer
122 views

How to compare two Geodatabases

I would like to compare the data of two geodatabases, in SDE or a file geodatabase, to detect the changes occured between them , i've tried to compare the Xml workspace document of both databases ...
2
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1answer
81 views

pass an array of geometry to postgresql function

I am trying to pass an array of geometry to a postgis function using JDBC with JAVA: CallableStatement proc = conn.prepareCall("{ ? = call somefunc(?) }"); ...
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0answers
53 views

OpenStreetMap Road and Polygon Data as 1x1 Degree Shapefiles

I am working on a global project for which I want to use OSM data as a model input. I am looking for advice on the best way to produce 1x1 degree WGS84 shapefiles from either regional extracts or the ...
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2answers
66 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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0answers
42 views

Geoserver WPS - Tiled Barnes Surface with geospatial index

I'm using Barnes Surface to compute a set of points from my PostgreSQL db. The problem is that my whole table is processed for each tile. I added a geospatial index on my points, how can I tell ...
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1answer
55 views

PostGIS transform geometry with long crs

How do i transform a geometry to a new geometry with a crs like urn:ogc:def:crs:EPSG::25832 st_transform(geom,integer srid) obviously doesn't work since my srid is a string found a solution ...
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1answer
26 views

why is the CDB_QuantileBins function not found in cartoDB?

What is wrong with the following SQL query on my data? I found pretty clear documentation (1,2) that the function is supposed to work. SELECT CDB_QuantileBins(array_agg(numeric_column_of_mine), 10) ...
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1answer
118 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 ...
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0answers
31 views

Problem installing Aggregate Polygons Function in PostgreSQL 9.3

I'm new to PostgreSQL and I've been trying to run a sql function written by Dr. Horst Duester, found in http://www.kappasys.ch/cms/index.php?id=65&L=5, which is used to aggregate detached ...
2
votes
1answer
86 views

polygons and lines not drawn correctly (qgis+postgis)

i am really new to this so i could use some help.. i load osm file into postgresql and then i connect to the database with qgis t to plot it and i see this it happens to whatever file i import to ...
0
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1answer
58 views

how to run a PostgreSQL query on CartoDB tables?

I want to run a VACUUM FULL on my table, but I don't think it's working. Simply sandorl.cartodb.com/api/v2/sql?q=VACUUM&api_key={MYKEY} results in long output, apparently only repeating for ...
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1answer
564 views

How to save results of postgresql to csv/excel file using psycopg2?

I use driving_distance in postgresql to find distances between all nodes, and here's my python script in pyscripter, import sys #set up psycopg2 environment import psycopg2 #driving_distance module ...
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0answers
65 views

Geoserver WFS Fails to Load in OpenLayers

I'm working with Postgis->Geoserver->openlayers on localhost. I followed a Geoserver tutorial to import some nyc sample data into my postgres/postgis database and link it to Geoserver. The layer ...
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0answers
49 views

PostGIS: calculate width/length of rectangular surface

I have rectangular shaped surfaces (multipolylines) and I need to calculate the width and/or length.. they have a rectangular shape but they're not real rectangles. Is there a way to do this ?
0
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1answer
163 views

Use psycopg2 to do loop in postgresql

I use postgresql 8.4 to route a river network, and I want to use psycopg2 to loop through all data points in my river network. #set up python and postgresql connection import psycopg2 query = """ ...
2
votes
1answer
134 views

System requirement specification for Big Data Postgesql, PostGIS, and GeoServer based service

I want to start a GIS portal for around 3000-5000 visitors per day. MY database will be of an approximate size of 10 Terrabytes. The maps and layers are moderately complex, satellite-map overlay is ...
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1answer
219 views

How to execute sql lines in postgresql using python?

I use postgresql 8.4 to route a river network, the following is my code typed in pgAdmin and the result is fine, select * from driving_distance ('select gid as id, start_id::int4 as source, ...
0
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1answer
48 views

Increase Map Availability in Geoserver [duplicate]

I have an application which access same map from two geoserver using loadbalancing concept the map is accessed using WMS service. where the two geoserver connected to a single same POSTGIS database. ...
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0answers
29 views

Double version of PostGIS installed on my server

For some reason I messed up an installation of Postgis on my PostgreSQL 9.2.8 server. I had version 2.0.3 installed and when I tried to upgrade to 2.1 it did so. The problem comes when I dump the ...
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0answers
162 views

PostGIS 2.1 error install with shared object (rtpostgis-2.1.so") Linux Mint

I've Installed Linux Mint 16 mate and install PostGIS with PostGreSQL (I've tried many ways in the Internet from original source to some suggestion) but all is too error: " ERROR: could not load ...
2
votes
1answer
108 views

POSTGIS: function st_collect(geography) does not exist

I am trying to use some Geography functions, but I am getting an error that (all) functions are not existing. I have checked other Stackexchange posts (e.g. this one), but the solutions did not work ...
2
votes
1answer
58 views

Inserting union of two tables into another table Postgresql

I am working on a research project. I have two tables, one of a polygon that represents a severe weather risk area, one that represents the US. I want to merge them into one output polygon. I am stuck ...
2
votes
2answers
61 views

Change from polygon to multipolygon in postgres

can somebody describe please how to do the transformation from polygon to multipolygon in the postgres DB, is not possible for me to save my edited data. All data loaded just need to do some editing ...
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vote
1answer
29 views

Does the psql prompt have a working directory in the file system?

I am learning postgis. This tutorial says "Navigate to where you downloaded the shapefile." Does that mean navigate to this location in the #psql prompt or navigate to this location with the $propmt? ...
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1answer
41 views

PostgreSQL : question about SELECT .. WHERE .. = max()

If you have, for example; SELECT * FROM data WHERE line = min( (SELECT length FROM lines) ) AND number < 500; (It's just an example, not a real code) How does PostgreSQL react when the ...
2
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0answers
31 views

PostgreSQL : Question about dropping tables inside funtions

I am writing a PostgreSQL code where I have a function wich is used multiple times in a single query with different input values. Inside the function I create some tables and use them. What is the ...
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0answers
131 views

Problems moving POSTGIS database from postgresql 8.3 to 9.3 using Navicat

I am using Navicat 11 to move a POSTGIS database from 8.3 to 9.3 on Mac OS X 10.9. I have installed PostgreSQL 9.3 and PostGIS with homebrew (brew install postgresql postgis) and everything looks ok. ...
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1answer
112 views

PostGIS Type Modifier Error

I'm trying to work an example from the "PostGIS Cookbook" and I'm getting an error I don't understand. I'm running the example using Postgres.app on a MacBook. Postgres.app is running PostgreSQL ...
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0answers
32 views

PostGIS : check if 2 lines are at contrary sides of third line

I am looking for a workflow to select a line on the condition that it is located on the contrary side of a middle line. So there are 3 lines (2 are given, 1 I want to select). I don't need you guys ...