PostgreSQL is an open source object-relational database system.

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6
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75 views

Best way to cut linestrings with points

i was checking the best way to cut linestrings by points. The scenario is: lots of streets, need the segments cut by intersect points, kind of this: I got linestrings (full uncuted by points) ...
6
votes
0answers
88 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 ...
5
votes
0answers
112 views

Spatial query too slow to handle bigger OSM extracts

I'm trying to compute some statistics for OSM data using PostgreSQL 9.3.5 and PostGIS 2.1.4. I started with a small bavaria extract which I downloaded from Geofabrik. The db schema is the normal API ...
4
votes
0answers
52 views

How to speed up simultaneous working with PostGIS layers in QGIS?

we are working on one big layer at the same time (10-20 people). Some of us use QGIS 2.8.1 and the other 2.6. The user with 2.8 have a lot of crashes (QGIS). The 2.6 users don't have this crashes but ...
4
votes
0answers
135 views

Error installing PGRouting database extensions

Im trying to install pgRouting and I cannot reach the end of the way because of the following error: psql:/home/user/share/postgresql/contrib/pgrouting-2.0/pgrouting.sql:2459: ERROR: could not load ...
4
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0answers
93 views

Postgis database query optimisation

I have a set of rasters in DTED format which I load into postgis database using raster2pgsql command line tool. Each of rasters is simply stored in a row and described by rid and a value of raster ...
4
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0answers
89 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 ...
4
votes
0answers
79 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 ...
4
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0answers
145 views

How do I simplify the straight sections of (multi)Linestring in PostGres/PostGis leaving the curved sections untouched

I have (multi)linestrings containing upwards of 5000 points and I want to perform two simplifications possibly using Ramer Douglas Peucker or alternative methods in PostGis The (multi)linestrings ...
4
votes
0answers
421 views

Hibernate Spatial - 'Invalid endian flag value encountered' Exception

I'm trying to run a simple query in Hibernate Spatial 4.0 on PostgreSQL 9.3. I have a number of objects in a table with latitude/longitude values, and I'm trying to query objects that fall within a ...
4
votes
0answers
111 views

Why are date vaules displaying a trailing 'Z' when layers are published with Geoserver and a PostGIS data store?

I have published various layers using Geoserver 2.2.x with a PostGIS 2.0.1 (PostgreSQL 9.1.x) data store. Fields that only have date values and not time/timestamp related values are stored as date. ...
4
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0answers
440 views

Finding poi using st_dwithin in postgis

I am not familiar with gis or writing sql, so my understanding in this field is lacking. I have a hundreds of lat/lng geographic coordinates stored in a single table called Places like this: ID | ...
3
votes
0answers
70 views

Is it possible to replicate an SDE geodatabase including the archive tables?

I have a database in one location which I would like to replicate to another using one-way replication. In testing we haven't been able to replicate the archive tables, which is unfortunate because we ...
3
votes
0answers
35 views

QGIS isn't displaying dates in the attribute table

I have a QGIS project that links to data in a Postgres database. For some reason, QGIS is not displaying any data in date fields. The date fields appear to be fine in Postgres and I have performed ...
3
votes
0answers
79 views

Insertion of a raster geotiff in PostgreSQL database

I am new in PostgreSQL and psql. What is the method to insert a raster geotiff in a postgreSQL database using command psql? What is the best format? Someone indicates to save a raster image as BLOB ...
3
votes
0answers
2k views

Error when register database with ArcGIS server

I am using Arcgis 10.1(x32) and I have successfully connect postgresql(x64) as geodatabase. When I try to register database with Arcgis server 10.1(x64), I followed the instruction on the esri' ...
3
votes
0answers
229 views

Hitting Memory Limits of PostGIS ST_ConcaveHull / Incomplete Shrink Wrap

I am trying to use PostGIS 2.0 on Postgres 8.4 to do some mapping. I am working with the NOAA Shapefiles, specifically their US States & Territories file located here: ...
3
votes
0answers
462 views

Select features within a country or bounding box effectively using PostGIS

I imported the planet OSM file into a PostgreSQL 9.2/PostGIS 1.5 server using osm2pgsql. I now want to select certain map features which lie within the bounding box formed by a countries borders, e.g. ...
3
votes
0answers
331 views

Is there a way to start the route on pgrouting from a coordinate that is not a node?

After execute all steps from this pgRouting tutorial, now I have a map that creates and displays routes, but as the routing methods rely on parameters representing vertex Ids that was created using ...
3
votes
0answers
542 views

How to save table from PostgreSQL to MapInfo File?

I have two tables: 1 with geometry in WGS 2 with geometry in Local System I tried this: ogr2ogr -f "MapInfo File" output2.tab PG:"host=localhost user=postgres password=123456 dbname=postgis" -sql ...
3
votes
0answers
590 views

How can I properly add PostGIS data into MapGuide Maestro?

I am having trouble connecting a PostGIS database to MapGuide Maestro. Actually, I have added the PostGIS data into Maestro, but when I click to validate the layer it shows an error message: ...
3
votes
0answers
235 views

OSM Database created: now what happens?

I imported an OSM file into a Postgres DB using the Osmosis tool. Now, I need to extract some data but I can't find any schema description (I'm really a newbie in GIS). Where can I find it? Do you ...
2
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0answers
16 views

Creat point count trigger in PostgreSQL?

I wish to create a trigger in PostgreSQL for counting points in a polygon. The tweak is that the count should automatically get updated whenever the polygon is edited. Can anyone please help me on ...
2
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0answers
41 views

Calculate mean value of polygon from raster in PostGIS

I started with a NetCDF .gri and .grd raster file of the UK provided by a colleague. I clipped it in R to be only London, exported and converted to a ASC file, and then imported it to PostGIS using ...
2
votes
0answers
18 views

Add individual fields to delete-log-trigger when deleting PostGis-Objects via QGis

I am using a PostGres Database with PostGis extension (on Windows). QGis serves as a client to access (visualize and edit) certain database-tables. I need to create a delete-log-table that saves all ...
2
votes
0answers
34 views

GeoDjango and bug with bounding box query

Just some context first, I have a postgres database with PostGIS extension, running under a GeoDjango wrapper. I have a weird bug that hopefully someone can shed some light on. I'm running a query ...
2
votes
0answers
43 views

How to create raster from table containing cell values in PostGIS?

I am having a table with integer values. These values are in between 0 and 2. I want to create a raster out of that table with integers as cell values. Or else how to create polygons out of that table ...
2
votes
0answers
140 views

Postgres OSM planet reverse geocoding

i'm building function for reverse geocoding in Postgres using PostGIS function's. For now i was able to clean up all the data that was useless to me(rivers, buildings,etc.). I got 3 ...
2
votes
0answers
120 views

How to get Geography data to GeoJSON in PostgreSQL?

I am using PostgreSQL database and there is a field in a table(area), i.e., public.geography(Points,4326). It contains below type of records "0101000020E6100000BA83D89942334540780B24287ED051C0" I ...
2
votes
0answers
265 views

How to load GeoJSON into PostgreSQL database using Python?

What I have tried to do is (In Python IDLE): import psycopg2 import json try: conn = psycopg2.connect("dbname='carto' user='postgres' host= localhost password='password'") except: print "I am ...
2
votes
0answers
90 views

How do you disconnect ArcGIS Pro from a PostgreSQL database?

What is the equivalent to the ArcCatalog's Disconnect option in ArcGIS Pro? I have successfully connected to a Postgresql database, but cannot figure out how to disconnect. This is what I'm seeing ...
2
votes
0answers
48 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
25 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
121 views

Arcpy cannot connect to SDE on PostgreSQL with 32-bit version

So I've been banging my head against a wall for awhile with this one. I recently setup an SDE database in Postgres, and all seemed good. I am able to connect to it from both ArcMap and ArcCatalog, ...
2
votes
0answers
316 views

Inserting coordinates from Google Maps into a Database

My question is pretty basic. I am using Android Google Maps to take the coordinates off a location on the map and I want to insert it into a PostgreSQL database. I know I have to use PostGIS but how ...
2
votes
0answers
79 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
27 views

How to Create Query Status Table Postgres

I am currently a user of a Postgres database (I am not the DBA). Within my sandbox I run several business critical scripts every day and currently track their status by first in a log text file on my ...
2
votes
0answers
548 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 ...
2
votes
0answers
170 views

Performance issues Tilemill with PostgreSQL and large datasets

I have a Tilemill project the size of europe. I developed my style-sheet by using a smaller dataset (size auf Austria) and everything was perfect. But now I did apply the same styles to my big europe ...
2
votes
0answers
67 views

Opengeosuite blank and postgresql errors

I had the unfortunate idea to upgrade opengeosuite from 4.0 to 4.1. I followed the docs found on opengeosuite site but something has gone wrong. I uninstalled opengeosuite and all connected packages ...
2
votes
0answers
165 views

How can I merge adjacent polygons and return all (adjacent and not adjacent) as Multipolygon?

I have a postgres database with administrative boundaries and their geometry. Each of those boundaries have an ident number. What I want to achieve: First I want to select all rows which are ...
2
votes
0answers
231 views

Can't see Postgis layers added to QGIS

I'm trying to transition from an old Postgres/Postgis database to a new one. I'm working in a fresh install of Win 7 64 bit. I installed Postgresql 9.3 32 bit, then installed PostGIS 2.1.3. I created ...
2
votes
0answers
97 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
169 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
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
308 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
272 views

How to best intersect vector data with raster data?

I have Open Street Map [OSM] data imported so that I can access the geometry of buildings. I have also loaded SRTM digital height data from NASA from a GeoTIFF raster. I have projected the raster into ...
2
votes
0answers
152 views

Data loss after compressing geodatabase in ArcSDE

I suffer sometimes from data loss after compressing ArcSDE geodatabase, this geodatabase contains versioned feature classes, so the compressing script reconciles and compress the geodatabase: # ...
2
votes
0answers
191 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
282 views

Loading postgresql tables in Arcgis for Desktop 10.1

I have postgresql version 9.0.5 installed and configured. Also in my ArcGIS for Desktop 10.1 in "Add Database connection" I have my postgresql connected and I can see all the tables in it (figure1). ...