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

learn more… | top users | synonyms

2
votes
0answers
232 views

pgrouting librouting.dll library is supposedly missing when it is not

Yesterday, I successfully installed pgrouting from the most recent x64 2.0.0 binaries, at least this is what I thought. I was able to perform first query - select pgr_createTopology() from the ...
2
votes
0answers
124 views

Geoserver : create a rasterized polygon / dynamic fill for polygons with features from database

I decided to post here because I couldn't find any answer to my problems on the internet. So I am using geoserver 2.7-SNAPSHOT, everything is working fine but I need to implement a new function or ...
2
votes
0answers
66 views

filling the attributes according to intersection of two layers (Postgresql)

How to automatically fill attributes of a point layer according to the exact position in the polygon layer? I mean how to write a command in PostgreSQL to automatically fill the attributes by the ...
2
votes
0answers
32 views

What are the problems of loading overlapping (or the same) tifs into postgis?

I am still early on the Postgis learning curve. I have an existing table in Postgres - it looks like this: create table "public"."mytable" ( "rid" serial primary key, "rast" raster, "filename" ...
2
votes
0answers
109 views

Cartographic-complete Maps in PDF On Request using Open Source?

Currently I have some data in PostGIS. I want to implement the following: users will make a request via web, with parameters like location, scale, layers to be displayed, etc. and I need to provide ...
2
votes
0answers
91 views

Reprojecting PostgreSQL/PostGIS data as it streams in?

I have a postgres/postgis database. I would like to reproject those data coming to me in 4326 to 32736. For those tables with lat long info in wgs84 (4326) I have set the geom to 4326. Then I have ...
2
votes
0answers
68 views

Why pgRouting GUI panel may not work in QGIS?

What could be the reason behind the mal-functionality of the pgRouting Layer GUI panel? In order to route shortest path via dijkstra function code I'm able to conduct the task using the following ...
2
votes
0answers
91 views

Are there naming rules for direct connections from ArcGIS to PostgreSQL?

I don't have problem direct connecting arcgis to postgresql if my database name contains only letters, but when the name contains dashes or underscore e.g:"gisdb-dev", I receive an error when setting ...
2
votes
0answers
331 views

How to plot heatmap/locations in Geoserver & Openlayers map from the Lat/Lon data of PostGIS table?

I am using Geoserver, Openlayers, PostGIS for Geospatial web implemenation. I have an Indian map shape files for States, Districts, Talukas. I am able to generate a map with states, districts, ...
2
votes
0answers
154 views

OpenGeo: GeoExplorer cannot upload shapefiles into PostGIS

I have installed OpenGeo 4.1 on Ubuntu Linux 12.04 following the official instructions. I then followed the tutorial Load your data with GeoExplorer. I was able to zip and upload a few shapefiles. ...
2
votes
0answers
120 views

Rebuilding a Polygon from the points within it, in PostGIS

This question is an update on the problem formulated here. I wanted to redefine the border of a set of polygons, in order to "smooth it". My first approach (described in the former question) was to ...
2
votes
0answers
32 views

ArcGIS dissolve analysis output issues in geoserver wfs/ PostGIS

I have an ArcGIS dissolve analysis output (parcel data) that needs to be loaded on PostGIS and published as a wfs from geoserver. The issue is that the ArcGIS dissolve output shapefile, although can ...
2
votes
0answers
148 views

List of vector to one raster in PostGIS

Hi PostGIS developers! I need to rasterize a part of OSM map by coordinates. I found rather good algorithm, but can’t finish it. I have problems in STEP 3. I described all algorithm here – may be ...
2
votes
0answers
279 views

N Nearest Neighbours efficiently PostGIS/Python

The data is worldwide about a million points, lat/lons, with an id and an importance value (0.0 to 1.0), and it's limited to being on land. Ideally I need to cluster all 1 million points into 100,000 ...
2
votes
0answers
171 views

Is it possible to create an ellipse around a line in 3D space?

In Postgis 2.1.1, I have a line in 3 dimensional space connecting two antenna points on the earth's surface. Is it possible to create an ellipse around that line? I have a formula to compute the ...
2
votes
0answers
202 views

Determine PostGIS geography polygon orientation

How can you determine the orientation of a PostGIS geography polygon? I'm looking/hoping for a function that would tell me which side is the interior (left or right) as you traverse the vertices of ...
2
votes
0answers
357 views

Postgis / QGIS Snap Point to Line

I'm trying to snap points to lines in postgis for use in QGIS, but cannot get it to work. I have one line in my line table (although it was created by merging multiple lines together) and about 600 ...
2
votes
0answers
103 views

Use of postgis with hibernate

We have an existing postgis database. Our application is developed in Java, but queries database through a jni dll, which appears to be not very effective for our purpose. I've managed to migrate to ...
2
votes
0answers
588 views

Rotation by attribute in Geoserver SLD style

I have a table with field calculated by function: NEW."rotationAngle" := degrees( ST_Azimuth( ST_StartPoint(NEW.the_geom) ...
2
votes
0answers
129 views

How to get the nearest points from pgrouting linestring result?

I'm trying to get the points or landmarks near from the result of pgrouting linestring( the shortest path ). I'm using OSM map entities and working with planet_osm_point. Here's my codes. SELECT ...
2
votes
0answers
72 views

Weird-looking France after OSM import with osm2pgsql

After importing france-latest.osm from Geofabrik, using osm2pgsql, it seems that the polygon attributed to Metropolitan France (osm_id = 1403916) is a bit odd: I'm far to be a geography expert, but ...
2
votes
0answers
152 views

How to calculate bus route transfer by using pgrouting?

Let say I have route 1 from A -> B -> C, route 2 from C -> B -> D, how can I write SQL for pgRouting which can let me have the result route 1 -> route 2 when I want to get the shortest path from A ...
2
votes
0answers
188 views

How to export postgis points as blocks in dxf with ogr2ogr

I'm trying to export postgis points as blocks to DXF format. I have a simple table in postgis with columns: CREATE TABLE pod_com_azimuth ( ogc_fid integer, rotation double precision, pointtype ...
2
votes
0answers
43 views

PostGIS query with input from point layer

I have a table of rivers in PostGIS, each river linking to its outflow. I also have a QGIS layer of some selected sources, and would like to select the entire river downwards from each source (i.e. ...
2
votes
0answers
268 views

Collapse dual carriageway lines in PostGIS

I have OpenStreetMap data, which represents larger roads (e.g. dual carriageways, aka divided highways) as parallel lines. The question is answered for ArcGIS or Skeletron here, for example using ...
2
votes
0answers
297 views

TileMill Exports Failing

I'm having trouble exporting my map in TileMill (v0.10.1). I'm using OSM Bright with a PostGIS database connection to import OpenStreetMap data. When exporting an SVG or PDF through the user interface ...
2
votes
0answers
112 views

QGIS is not working with Postgres Plus Advanced Server

We have a problem to integrate GIS software with our GIS database which is populated on Postgres Plus Advanced Server 9.2 from EnterpriseDB. We are using QGIS to maintain and analyze our GIS ...
2
votes
0answers
644 views

how do I create a RESTful PostGIS web Service Framework?

I have PostGIS tables that store vectors that want to show on Google Maps. Read the post http://gis.stackexchange.com/questions/22354/how-to-display-a-postgis-table-on-google-maps But one thing that ...
2
votes
0answers
65 views

Import raster to postgis and add a foreign key constraint

I use raster2pgsql to import raster files into a table with this command line: C:\Program Files\PostgreSQL\9.3\bin>raster2pgsql -s 4326 -M -F -a c:\temp\mun.tif public.basqui_raster | psql -U ...
2
votes
0answers
178 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 ...
2
votes
0answers
78 views

PostGIS does not export shortest path to Shapefile

I am trying to draw a bunch of lines overlaying the globe map in a WGS84 projection. To this effect I have created a PostGIS DB with a table that has one column containing linestring data. My problem ...
2
votes
0answers
32 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 ...
2
votes
0answers
418 views

How do I catch PostGIS/PostgreSQL RAISE messages in QGIS?

I have a trigger set up in PostGIS/PostgreSQL which will show a RAISE WARNING when an inserted or updated polygon is within a certain distance of some predefined planning constraints. I want this ...
2
votes
0answers
290 views

PostGIS: How to distinguish overlapping routes (i.e., LineStrings) based on their direction?

I have a set of routes which are represented by LineStrings in my PostGIS database. These routes represent journeys that people make. I want to come up with routes that (a) overlap, and (b) have the ...
2
votes
0answers
150 views

How to set posgis default sequential value in a QGIS “editable” view?

Introduction In a QGIS project I have a VIEW, that I want to became editable (I'm trying to replicate the versioning system used DB Manager with some tweeks). Therefore I created a few rules to ...
2
votes
0answers
108 views

PostGIS replace view crashes PostgreSQL server from ArcGIS script

I have the following script which when from ArcGIS (and a similar script from a QGIS plugin) will update a view. Every so often (around 1 in 5 times the script is run) it causes the PostgreSQL ...
2
votes
0answers
363 views

Publish existing table from postgis to geoserver

I would like to know if there is any way for publishing existing table from postgis to geoserver using Geoserver REST API or geoserver-manager java implementation. The thing is that i'm actually ...
2
votes
0answers
176 views

Trajectory Indexing: How could I store and index the large trajectory dataset generated by cars' GPS?

I have a large trajectory dataset generated by cars' GPS. Since I will do some data mining work on them, I need an efficient way to store and index them. I read some papers about Trajectory Indexing ...
2
votes
0answers
680 views

import esri Personal Geodatabase (.mdb) to PostGIS

I would like to import an esri Personal Geodatabase (.mdb) to PostGIS. I have tried to follow the blog post: How to import esri Personal Geodatabase (.mdb) to PostGIS on Linux I installed the GDAL ...
2
votes
0answers
81 views

Is there an ArcGIS to PostGIS function cross-reference table?

I was looking back at the presentation called "PostGIS Tips for Power Users" by Paul Ramsey and got to thinking... Has anyone ever seen an ArcGIS Geoprocessing Tool to PostGIS function cross-reference ...
2
votes
0answers
149 views

Using ST_Affine() and trans_param() functions on vector layer

After reading this post How to georeference a vector layer with control points? I decided to give it a try to move/rotation/scale a polygon using Postgis. I have two polygons, polygon_from and ...
2
votes
0answers
208 views

Styling river charts with TileMill - issue with filling a polygon made of disjoint line segments

I am trying to style inland river charts produced by the Army Corps of Engineers. I imported the vectors into Postgres, and I’m using TileMill to style the data. I am having trouble correctly filling ...
2
votes
0answers
49 views

Update PG table setting an area_id

I have a table with lots of points which I'd like to update and set a consecutive area_id to every point "group". I define a point "group" as points that are within a 500 meters radius. The raw table ...
2
votes
0answers
85 views

Geoserver Feature Versioning Support

I am creating a map feature editor that supports versioning & rollback using Geoserver as the WFS. From what I've read online, it seems Geoserver supports feature versioning. My question is how ...
2
votes
0answers
532 views

Migrating from PostGIS to Oracle Spatial

We are now using a solution based on PostGIS extension of Postgresql database for various spatial queries. But we are now thinking about data security. This is why we have a plan to migrate existing ...
2
votes
0answers
579 views

Smooth, not simplify, lines features in PostGIS

I'm trying to automatically generate paths to place labels on that follow the shape of rivers, 4wd tracks and other very windy lines. At first I thought the st_simplify() function was the answer, but ...
2
votes
0answers
96 views

Can't connect to WMS service? An Amazon-EC2 problem?

I'm running GeoServer 2.3.5 on a Windows instance in AWS for the first time. The data is on the server in PostGIS. The map layers have been published and I can see them locally without any problems. ...
2
votes
0answers
187 views

Spatial Precision for Editing in Multiple GIS Clients

I have something I'd like to discuss, I'll try to explain it first, why it's important, and I'll explain how ArcGIS handles the issue, which I think is a good way to handle it. Finally I'd like to ...
2
votes
0answers
158 views

Large buffers in PostGIS (5000 km radius)

I have a number of points stored as geographies in PostGIS (version 2.0.1), and I'd like to create rather large buffers around them (with a radius of 5000+ km). However, ST_Buffer doesn't handle this ...
2
votes
0answers
424 views

3D features (Polyline, Polygon) intersection library

For my research I am looking for a (python) library to get the intersection of some 3D features. The features can be Polygons or Polylines. Mostly I need to intersect a plane with my features and get ...