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

learn more… | top users | synonyms

2
votes
3answers
973 views

adding non spatial attributes using geoserver

I am using Openlayers + geoext to perform transaction operations in postgis database using geoserver . i can insert spatial data into postgis but cannot insert other data like road name, road type in ...
2
votes
1answer
507 views

Accessing PostGIS raster data using Query Layer in ArcGIS Desktop?

I tried to load raster file (jpg) into post gis using the syntax provided here "C:\Program Files (x86)\PostgreSQL\9.1\bin>raster2pgsql -I -C -e -Y -F -s 102003 -t 300x300 ras_test.tif ras_test1 | psql ...
2
votes
2answers
3k views

Problem when calculating longitude and latitude for points

I have a PostGIS database with SRID=900913 (Google Mercator) and I would like to know the latitude and longitude of points. I use this command: ST_X(ST_TRANSFORM(the_geom,4283)) Following what is ...
2
votes
1answer
524 views

The minimum bounding circle of geometry that crosses the 180th meridian

Background: I've been given a task where I have to calculate the minimum bounding circle of Alaska (for the purpose of running a Roeck test). I'm using the Census' state level geometries available ...
2
votes
1answer
3k views

Basic MapServer query of PostgreSQL/PostGIS database

I've just installed MapServer on a linux server and I am trying to understand how to display a basic map using a PostGIS database. I have displayed a shapefile in the browser, so I know that the ...
2
votes
2answers
459 views

unable to call shp2pgsql using python

I am unable to call shp2pgsql using python as I have to pass various options like (-s -a -i) and I am not getting the required output .. Method I am using is p1 = subprocess.Popen(["cmd", "/C", ...
2
votes
1answer
965 views

GeoServer converting PostGIS timestamp with time zone

In a PostGIS view i have a field of data type "timestamp with time zone". In GeoServer this field is show with datatype "Timestamp" My problem is that i want the Timestamp to be show in my ...
2
votes
5answers
5k views

Error importing Shapefile to PostGIS using Importer GUI

I'm trying to import a shapefile into a PostGIS database using the graphical importer. I just installed POSTGRESQL, and PostGIS. The GUI looks like this: After testing that my database worked, I ...
1
vote
1answer
336 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. ...
1
vote
1answer
170 views

postgis: cluster/group points based on distance

We have a set of thousands of points and want to group all of those which are within 100m distance from each other (to get the centroid from each group). A first idea was to build 100m buffers around ...
1
vote
0answers
90 views

What is wrong with my WFS-T protocol setup?

So I want to transfer some Vector Layer Features from javascript code to my geoserver and then to postGIS, my code looks like this: saveStrategy = new OpenLayers.Strategy.Save(); ...
1
vote
1answer
93 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 ...
1
vote
1answer
85 views

Is the Azimuth on the equator equal to the one not on the equator?

I am trying to fully understand the concept of Azimuth and I am encountering some inconsistencies (or maybe it is my error). I show you some examples that do not match, hoping somebody can explain me ...
1
vote
1answer
172 views

GeographyFromText and ST_SetSRID+ST_MakePoint different results?

Why am I getting different results? SELECT ST_DISTANCE( ST_GeographyFromText('SRID=4326;POINT(13.401111 52.383343)'), --berlin ST_GeographyFromText('SRID=4326;POINT(9.997559 53.533778)') ...
1
vote
1answer
345 views

Converting file geodatabase with coded domains to PostgreSQL / PostGIS?

We have several file gdb's and would like to convert these to Postgres / PostGIS. We've used ogr2ogr to transfer these files; however, some of the fields are stored as coded domains and the fields are ...
1
vote
1answer
596 views

MapInfo 12 problems with PostGIS database

I am simply trying to connect MapInfo 12 to my existing PostGIS database but after hours of trying various options I have hit a brick wall and need help. So far I have: 1) Downloaded and installed ...
1
vote
0answers
173 views

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 ...
1
vote
1answer
369 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 ...
1
vote
1answer
234 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 ...
1
vote
0answers
273 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 ...
1
vote
1answer
565 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 ...
1
vote
1answer
1k 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 ...
1
vote
1answer
153 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, ...
1
vote
0answers
48 views

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 ...
1
vote
3answers
800 views

Why can't I open postgis layers in QGIS?

I've set up a table in PostGIS using OSM data (converted using osm2pgsql). I know this database is good, because I'm able to import it and work with it in TileMill, but whenever I try to interact with ...
1
vote
1answer
242 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 ...
1
vote
1answer
278 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 ...
1
vote
1answer
456 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 ...
1
vote
1answer
1k 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 = ...
1
vote
2answers
273 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 ...
1
vote
3answers
456 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 ...
1
vote
0answers
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, ...
1
vote
0answers
1k views

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 ...
1
vote
1answer
105 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 ...
1
vote
1answer
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 ...
1
vote
1answer
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 ...
1
vote
3answers
748 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 ...
1
vote
1answer
149 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 ...
1
vote
2answers
710 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 ...
1
vote
1answer
569 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 ...
0
votes
1answer
37 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 ...
0
votes
2answers
74 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 ...
0
votes
2answers
73 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 ...
0
votes
0answers
46 views

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: ...
0
votes
1answer
152 views

How to calculate the optimum bus route using pgrouting?

My setup for my web page is OpenLayers, Postgresql/postgis and pgrouting. What I do not understand is how I am going to do the routing.I have read many tutorials but I don't understand what my next ...
0
votes
0answers
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 ...
0
votes
0answers
167 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 ...
0
votes
0answers
72 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 ...
0
votes
1answer
853 views

PostGIS Column has Z dimension but geometry does not

I am able to create a geomtry column for 3d multiline using this: CREATE TABLE trajectories ( gid serial NOT NULL, vehid character varying(10), state integer, geom ...
0
votes
1answer
150 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. ...