PostgreSQL is an open source object-relational database system.

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How can I render the postgis layer to the openlayers map viewer?

I have a postgres table which is storing the dynamic GPS point data. The geom column has been created. Is it possible to render the last 10 mins GPS data to the OpenLayers map? Is there an example? ...
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38 views

how to open shapefiles in web interface using mapserver and postgresql?

As I am new to coding I am unable to understand how to connect postgresql database to mapserver in asp.net and to display the shapefiles in web interface.
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167 views

GeoJSON and php i cant visualy roads from postgres database

I am make a json file with geometry MultiLineString from the posgresql but when i try to load the file in map.data.loadGeoJsonis not visually the roads but if i take the link from google api example ...
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2answers
90 views

Viewing large set of polygons in PostGIS using OpenLayers?

I am prety new to GIS. I have set up a postgis database with al large dataset and a openlayers front-end to display it. But since the dataset is getting prety big I am looking for a way to only load ...
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1answer
129 views

How to change the postgresql table to support postGIS?

I have a postgresql database which there is the table have lat & long columns. The postgresql does install the postgis extension. My question is how can I change the table with lat & long ...
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127 views

Importing a Raster into PostGIS 2.1 (Windows 7)

I am trying to learn how to import rasters into PostGIS (2.1). I have read through all the material I can find on doing this and know that the recommended tool for this is the raster2pgsql tool. I ...
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1answer
102 views

Loading raster in postgis and link it with an existing table

Relatively new to PostGIS and I am currently exploring the options to make one of my PostgreSQL Tables spatial. Essentially I want to store a raster object in a table that also contains essential ...
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1answer
227 views

How to migrate Postgres table having Lat Lon columns to an existing PostGIS database?

I am having Postgres database table with Lat Lon columns (degree, minutes, seconds) as shown below : CREATE TABLE population ( id double precision, idno text NOT NULL, place text, state text, ...
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77 views

Project with Postgresql and PHP and GoogleMaps

i like to make samething like this https://sites.google.com/site/mapperzmapdemo/ put i stack in the conection database and web application I try to explane my problem i make a code to read first ...
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1answer
382 views

Why use a database when you can have all of your data in javascript/openlayers?

I have a really simple and basic question. First of all, I have to mention that I am pretty new to web applications and GIS. I am working on a web application using Openlayers, Postgresql/postGIS and ...
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76 views

Close linestring to linering in PostGis

is there a function which closes a linestring to a linering? I couldn't found such a function in the documentation. Thanks.
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76 views

Adding data from PostgreSQL to Query Layer of ArcGIS for Desktop warns that given coordinate references are incompatible?

When adding data from PostgreSQL in a Query Layer I get the warning "The given coordinate references are incompatible" I have added many other layers with the same properties no problems, but I have ...
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121 views

PostgreSQL PL/Python Function for “IF” condition

I am using OSM data to run pgr_dijkstra() for weighted-path calculation. But after importing OSM data using osm2pgsql I populated some additional columns into my ways table. So now it has gid serial, ...
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1answer
106 views

What does the values in column clazz (osm2po) mean?

I have a given table in postgreSQL with OSM data which is used for routing purposes in Java with PGRouting. There exist two columns which I don't understand. They belong to osm2po. They are labeled ...
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1answer
104 views

If do not want to use pgRouting then what?

Good evening fellow GISers, I am interested in creating an online routing application. So supposing I have all the data I want into a postGIS database and loaded onto GeoServer and I am willing to ...
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1answer
199 views

Error when creating enterprise geodatabase

I'm trying to create an enterprise geodatabase. My problem is when I try to create a corporate geodatabase. The error is: Cannot connect to database because the database client software failed ...
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2answers
136 views

Similarity between two or more trajectories

I have the data of trucks (http://www.chorochronos.org/). This data are gps coordinates of multiple trajectories of trucks in Athens. I have to calculate the similarity between the trajetories, in ...
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24 views

2.4.0-Chugiak PostgreSQL layer subset causes DB error

I have succesfully connected to pgsql layer. I got an error after trying to define feature subset in query builder. Can anybody help with this error? An error occurred when executing the query. ...
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2answers
167 views

take from multilinestring the start & end points

I have to use the A* algorithm and my geometry is in multilinestring and i want to take stratpoint(x1,y1) and endpoint(x2,y2) . I use this queries but the colums after the execute is still empty ...
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1answer
75 views

Query to get convex hull

Is the below query correct to get a convex hull shape: DATA "the_geom from (select ST_ConvexHull(ST_Collect(the_geom)) As the_geom FROM xyz) as foo using unique id using SRID=XXXX"
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27 views

Error in querying data

I have a mapserver file as below , I get blank page with no map executing this query: NAME var DATA xyz STATUS ON TYPE POINT DUMP TRUE ...
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67 views

Create a Shape file from Sql dump file

I am trying to map data by querying a table called xyz. I need to show the the_geom data on the map. I have below query in my mapserver .map file: DATA "the_geom from xyz using unique id using ...
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1answer
122 views

Order by geometry columns

I am wondering how it really works, I mean "order by" statement when it comes to geometry/geography columns in postgis/postgresql. Besides that really need a way gather rows from a table with a point ...
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21 views

at which location to run psql2shp command in linux [duplicate]

I have linux system which I have connected remotely and I am not able to use $psql2shp command in the command line. I went to /usr/local/pgsql/data to run the command but I was unable to run. I dont ...
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104 views

Rollback error when restoring SQL dump file in postgresql using PSQL console via Pgadmin

I am trying to restore a pg_dump SQL file into my postgresql database using PSQL console , where I typed the below command: \i 'c:/../path/to/sample.sql' when I run this I get an error saying ...
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288 views

Where to type pgsql2shp command

How to convert post gis database into shapefile, I found that I need to use pgsql2shp command on postgis database query , But how to use it and where to use it. Do I have to use it in the postgre sql ...
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112 views

Using pgrouting and algorithms in PostgreSQL?

I am trying my first pgrouting in a roads shape file i load it in postgresql first, the table has osm_id gid name ref type oneway maxspeed after i add columns source and target in table ALTER ...
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1answer
101 views

How to populate geography point using ST_MakePoint(long, lat)

I have a table called customer_campaign, and there is an empty column geom(geography) in it. So I want to fill it up by using ST_MakePoint(long, lat) in PostGIS, lat and long are two columns in the ...
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100 views

Geoserver ( Java.exe ) cause server to run 100%

Our server runs at 100% CPU when using map services build on geoserver + postgresql I can not find anything in geoserver logs. It is Java.exe takes 100% CPU and because of that server can not do ...
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3answers
121 views

How to export streets in a certain area from one shapefile to a new shapefile?

I have a shapefile with the roads from Europe and I want to export in a new shapefile only the roads from Greece. I tried to delete the other roads but there are too many and I have no attribute to ...
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1answer
73 views

Lost Foreign key during conversion of SQLite to PostgreSQL using ogr2ogr

I want to centralise several small sqlite databases into a single, big, postgresql database. I am using ogr2ogr to convert my sqlite / spatialite (v3.7.17 / v4.1.1) databases, each one consisting of ...
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153 views

All map services display pink tiles

I have implemented mapserver in Ubuntu 14.04 with postgresql 9.3, postgis and imposm using GitHub tutorial. After completing the tutorial all map services display pink tiles not map info. i was not ...
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49 views

Does qgis support postgresql range types?

I added a postgis layer with date range column in Qgis but that field is not listed in Qgis.
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447 views

Can PostGIS and QGIS provide dependable multi-user editing?

After considering a few options, I'm trying to give my 15-20 QGIS 2.2 users the ability to concurrently view/edit one or two basic point PostGIS layers, largest one has just 16,000 records. I've ...
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1answer
99 views

problem in pgRouting with data from google earth

Hello i am new in forum an in Postgesql,postgis and pgRouting. I try to make a pgrouting for my city roads. I use googlemaps to make a lines with coordinates of the roads and export the results in ...
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1answer
163 views

Geoserver to PostGres database using a hostname

I am trying to connect GeoServer to a PostGres Database with PostGIS extensions installed, but I need to use the host name becauuse the IP address may change. I am running geoserver and postgis in ...
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2answers
25 views

Inside/Outside Local Jurisdictions

Does anyone know of a software or service that can define whether a location is inside or outside of city and county jurisdictions? Our company is getting hit with huge tax audits because we did not ...
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1answer
311 views

Configuring SFCGAL to PostGIS Db

I was using PostgreSQL with PostGIS and Pgrouting. Recently I needed to install SFCGAL for some extra functions for my PostGIS db. After installing SFCGAL, now I don't know how to update my PostGIS db ...
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2answers
103 views

Did I set up Tiger Geocoder incorrectly?

I set up Tiger Geocoder in PostGIS on my local box (PostGIS 2.1.3, PostgreSQL 9.3.5, Tiger 2013 data). The problem I'm running into is that on almost every street most of the points are clustered, ...
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82 views

R PostGIS convert SpatialPolygon to PostGIS table

I've been having some success in scraping some webdata and converting it from HTML to spatial data as originally asked here: Parse PHP/HTML to shapefile or similar I've been using R to both fetch the ...
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78 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
69 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
110 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
42 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 ...
2
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2answers
176 views

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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1answer
362 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
299 views

Get a single cluster from cloud of points with specified 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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438 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
63 views

Display data from postgresql on click map [duplicate]

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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1answer
205 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 ...