PostGIS is an extension for the PostgreSQL object-relational database that adds support for geographic objects.

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Why does QGIS crash when my PostGIS table has a primary key?

Configuration: PostGIS Library: 2.0.3 GEOS: 3.3.8-CAPI-1.7.8 Proj: Rel. 4.8.0, 6 March 2012 PostgreSQL 9.2.2, compiled by VC++ build 1600, 64 bit, running on Win2012 server 64 bit QGIS 2.2.0 - 32 ...
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398 views

QGIS loads PostGIS layers but DBManager can't connect

DB Manager can't connect to PostgreSQL, but "Add PostGIS Layer" can. My eventual goal is to save created layers to PostGIS. I assume I can do this using the DBManager Tool. I can alternatively use ...
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286 views

PostGIS convert GeoJSON to geography

While there are functions to convert geography to GeoJSON: text ST_AsGeoJSON(geography geog, integer maxdecimaldigits=15, integer options=0); I do not see any way to go the opposite direction ...
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294 views

How to create a regular polygon grid in Openlayers?

I am trying to create a grid in my map and do some calculations. I seen the following links:- Create regular polygon grid using postgis Create regular polygon grid inside a polygon using postgis ...
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616 views

Error while installing PostGIS on ubuntu 12.04

This is my first practice on Ubuntu machine. Here i am trying to install PostGIS 2.1 on postgresql server 9.3.2. When i am following the procedure mentioned here Help I am getting the following ...
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1k views

Having trouble connecting QGIS with postgres database with postgis extension [closed]

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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168 views

cartodb: query for the points within a radio from another point - postgis

I've georreferenced a couple of points in a CartoDb table, so now I have a the_geom column of type point I'd like to get all the points that are x meters away from a certain x,y point. So far now, ...
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How to load or query data directly to R from a PostGIS database using RPostgreSQL and rgdal [duplicate]

Is it possible to load/query a shapefile to R, which is stored in a postgres/postgis database? I've built up a connection to my postgres database via DBI, RPostgreSQL and I want to make some ...
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254 views

How can I map data points to OpenStreetMap (OSM) line data?

my goal is to filter measuring points of vehicles by mapping them to streets. So I could filter out all the false data located in fields and rivers and so on. I imported my data into a PostGIS ...
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312 views

QGIS cannot view raster loaded to PostGIS through raster2pgsql

I tried to load a raster GeoTIFF image to a PostGIS database using "raster2pgsql" following the OpenGeo Suite Manual. The command I used is: C:\>raster2pgsql -s 4283 -I -C -M "C:\Program ...
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QGIS: using postgis can I define a layer using sql?

I have a vector layer (call it master) that is stored in postgis and consists of a number of line segments. I also have a collection of sub layers that consist of subsets of the master layer. I can ...
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486 views

Problem connecting to localhost PostGIS

When I try to connect to a small localhost PostGIS database using QGIS, I get the error message: FATAL: no pg_hba.conf for host "fe80::4528:3236:418a9e7b%10" user "postgres", database "nyc", SSL off ...
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2k views

Split linestring to smaler lines

Hi I need help splitteing a linestring into smaller linestrings, using postgis. I need to route to closest point on the linestring, so i need to have more points on the line Sample Linestring = ...
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2answers
288 views

How to remove shapefile from PostGIS

I added a shapefile to the PostGIS using, ogr2ogr -f PostgreSQL PG:"host=server_ip user=username dbname=dbname password=password" yourshapefile.shp; Now I want to remove it. What is the command ...
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957 views

How to find the center point of MULTILINESTRING?

How to find the center point of MULTILINESTRING, which lies on the multiline?
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3answers
469 views

Java shared hosting with PostGIS

I've been developing a disaster risk management application that makes use of Java/Smart GWT, PostgreSQL/PostGIS, and Tomcat 7. I'm looking for a shared hosting environment for the beta testing period ...
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2k views

Error when importing shapefile to Postgis database

I was trying to import shp to postgis database and i get the following error: Importing with configuration: adresy92, public, geom, C:\Users\tomek\Desktop\adresy92, mode=c, dump=1, simple=0, ...
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how can we save vector files in openlayers

i'm using Postgis + tomcat + geoserver + openlayers for my application. with the help of some tutorial i have reached upto gettting feature information of layers. Next i want to edit and save ...
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109 views

Which SRS is computational more effective to store continental scale data? (given some conditions)

For a Precision Agriculture application I need to make calculations in UTM projection. The data will be stored in Postgis and is made of soil samples results (point data) and field boundaries of many ...
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1k views

Mapserver/PostGIS Query Error

I'm having some difficulty understanding the error I am getting from my mapserver/postgis program. I have the following map file: MAP # start of map file NAME "sample" EXTENT ...
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3k views

Problem inserting Geometry into PostGIS Table

I am new to Postgis and I have imported a shapefile containing point layer into the postgis, and the SRID i had chosen was 4326. now while inserting the values into the table I am getting problem. My ...
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3answers
752 views

Failing to build PostGIS on OS X 10.7 Lion

I am trying to install postGIS from source to match the default install of postgreSQL on OS X 10.7. I installed GEOS and PORJ.4 from Kyngchaos and ran $export MACOSX_DEPLOYMENT_TARGET=10.7 $export ...
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151 views

Get relative north aligned point 2163 (US Equal Area)

What I'm trying to do is create a grid where the y axis is north aligned. I have a origin Lat/Lon point which is the bottom left corner of the grid and each cell should be 100 by 100 meters. So I ...
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2answers
736 views

PostGIS - certain MultiPolygons cause “BOOM! Could not generate outside point!”

I've just posted this at StackOverflow and someone suggested I try here. Original: http://stackoverflow.com/q/5863859/246265 I'm trying to represent a rectangular area which crosses 180 degrees ...
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578 views

Circle features missing in PostGIS after import from ArcGIS using ogr2ogr [closed]

I have a ArcGIS feature class of geometry type polygon. It was created as a convex hull with a 200 meter buffer on a point dataset, aggregating rows on a particular field. The number of points used to ...
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How to relate a Spatial and Non Spatial table in PostGIS to be visualized in QGIS

first of all I'm quiet new in PostGIS. I'm working in pgadminIII with postGIS. I have in one database two tables. See the two tables SQL Pane. CREATE TABLE gw_body_characterisation2 ( ...
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How to convert a geojson from Postgresql to geojson format readable in rCharts in R?

I am creating a Rshiny interface on that can take in user input and SELECT the respectively map layer from Postgresql database based on the input. The package I am using to plot the map is rCharts. ...
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41 views

Raising height of a certain part of choropleth

I have a working choropleth map which shows number of patients in a certain coloured area. I want to raise the height of the specific area according to the patient count. The variable height is equal ...
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2answers
61 views

Exporting layers from ArcGIS into PostGIS while preserving attributes such as color

I have managed to import/convert a KML into ArcGIS 10.0 (ArcMap) using the built-in conversion tools and now have a series of layers. Next, I export these layers to a PostGIS database using the ...
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2answers
106 views

Connect to postgres localhost in QGIS

I am firly new to actively work with databases. I wanted to try out some stuff on my home computer where I have installed pgadmin and postgres previously. I can connect to my localhost in pgadmin but ...
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82 views

How can I measure linestring on postgis?

I have a linestring and I want to measure this line. I try it on google maps. the result is that 0,65 km ...
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pgRouting with my bus network and select the best of the available routes? [duplicate]

so here's the case: I have been using postgresql/postgis, openlayers and pgrouting to create an online application that selects and visualizes the best of the availabble routes. My problem is though: ...
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76 views

From a point find the closest line [duplicate]

I tried to find a LineString from my table road the nearest line to a point I give, but it is return me all the table SELECT gid, ST_Distance(ST_Transform(ST_GeomFromText('POINT(39.240443 ...
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195 views

numeric issue while loading floating point-valued GeoTIFF into PostGIS

I am trying to import a floating point GeoTIFF image into PostGIS (2.1), using the following command: raster2pgsql -s 4326 -I -M -F -C tif_dir/*.tif public.map | psql -U postgres -h localhost -d ...
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87 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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162 views

How can I find the segment of a line that lies within a polygon using Postgis?

Given a "road", represented by a line, that crosses a "state", represented by a polygon: What is the SQL query I can use to find the segment of the road that is within the state? A concrete example. ...
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104 views

convert data from osm to osm tiles/marble

I need to convert the raw thata OSM XML to tiles styled like standard OSM tiles (and other styles if possible) From the research I've done I've found I need to have osm2pgsql and put it on the same ...
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261 views

Unable to implement pgrouting(plugin) pgr_astar routing algorithm (shortest path) [duplicate]

I have been working on a project for indoor navigation. I made the floorplan of the building and road-map for routing purposes as shp files (using JOSM, making GeoJSON and then converting to shp file ...
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638 views

Will MapInfo only read PostGIS data that has been loaded via EasyLoader?

NMZ says in this thread that MapInfo will only read data in PostGIS that has been loaded by MapInfo's EasyLoader. I wasn't sure if this was still the case so I've loaded data into postgis via ogr2ogr ...
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1answer
280 views

Aiming to retrieve source and destination from Android, use pgrouting dijkstra to find shortest path and display it back on Android

I have created an Android application that will accept source and destination from the user. It then calls a php page which takes in the lattitude and longitude of the destination and the source. I am ...
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1answer
207 views

How to automatically convert line features into polygons using QGIS/PostGIS?

I have a master table of line features and a number of tables that I use to join (in the SQL sense) to produce various layers. Some of theses layers consist of boundaries of administrative zones ...
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1answer
911 views

How to fix “Connection failed - Check settings and try again” when connecting to PostGIS?

I have Postgres running via Postgres.app on rails already and am trying to connect QGis to the database. PostGIS is working already. (questions already found online deal with this issue only) I do ...
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1answer
479 views

How to upgrade PostGIS 2.0 to 2.1 on Windows 7?

PostGIS 2.1 was recently released and I would really like to upgrade from 2.0, but can't quite figure it out. I had previously installed PostgreSQL 9.2 and PostGIS 2.0 using StackBuilder. Running ...
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903 views

PostGIS error reads “Geometry has Z dimension but column does not” [duplicate]

I try to store a polygon in GeoJSON format into my PostGIS table. Both are using the CRS EPSG:3857. This is how the polygon is defined. Note that I put in some whitespace to make it more readable. { ...
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227 views

What should I start with WebGis Mapserver?

I'm not native English Speaker and I'm a graduated student who want to have a master degree in software engineering. I have a thesis relative with "Build a WebGis for air pollution in Vietnam's ...
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138 views

Manually add a new point to PostGIS table [duplicate]

I did accidently delete a table row - or well, in fact a whole subway station. My attempt to solve the problem was this PostGIS function: ST_GeomFromText('POINT(coordinates)') But then PostgreSQL ...
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153 views

How to find features within a distance? [duplicate]

I insert the values from lat/long into the points. Those users move around and send me new Lat/long and of course , I made an update of the position. I need to find people that are in a distance ...
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1answer
238 views

Get lon/lat of feature in postgis

I'm hava a problem I have a point layer (shapefile) insert to postgis! I'm using MapServer and OpenLayer to display layer on map! Now, i want get lon/lat all feature of layer! Hope somebody can help ...
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1answer
509 views

How to insert non-spatial data through WFS-T insert?

When i perform wfs-t insert operation using postgis database only spatial data and primary key gets inserted. Can anyone point me to some examples in which attribute data are also inserted along ...
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2answers
325 views

shp2pgsql srid 2262 polygons NOT in geocordinates

Imported the following shape file: shp2pgsql -c -s 2262 MCGIS_Towns_Villages public.towns | pgsql -d database Queried: SELECT gid, name,st_astext(the_geom) as the_geom FROM towns The ...