-2
votes
0answers
31 views

US Census Geocoder returns different city that TIGER Shapefile data

When I geocode an address using PostGIS+TIGER 2013 I get a different city than what Census Bureau Geocoder reports. The Long/Lat are identical in both cases, but the PLACEFP is different although both ...
0
votes
0answers
4 views

OpenLayers gx_geocodercombo returns syntax error

I try to implement a gx_geocoder combobox... { xtype: "gx_geocodercombo", hideTrigger: true, emptyText: 'Enter address (streetname housenumber municipality)', width: 350, layer: ...
2
votes
1answer
24 views

Interpolating mobile signal data

I have collected the signal strengths for the mobile operator at some places in my college campus. Now I want to spatially interpolate this data for the entire campus. I am using PostGIS. I am ...
3
votes
0answers
32 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 ...
1
vote
2answers
24 views

problem to use openstreetmap data file with pgrouting2.0 on PostgreSql9.3

I'm a newcomer on pgrouting, and I want to test its functionalities. I've installed and configured my computer with Postgresql9.3, pgrouting2, and PostGIS. I've downloaded from openstreetmap the ...
1
vote
1answer
25 views

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? ...
1
vote
2answers
45 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 ...
1
vote
1answer
61 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 ...
0
votes
0answers
45 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 ...
1
vote
1answer
35 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
54 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, ...
1
vote
1answer
347 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 ...
1
vote
1answer
10 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.
6
votes
2answers
64 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 ...
1
vote
3answers
51 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 ...
2
votes
1answer
50 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"
1
vote
0answers
22 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 ...
3
votes
0answers
45 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 ...
2
votes
1answer
57 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 ...
0
votes
0answers
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 ...
0
votes
1answer
40 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 ...
2
votes
2answers
63 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 ...
2
votes
1answer
30 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 ...
0
votes
0answers
34 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 ...
1
vote
3answers
98 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 ...
1
vote
0answers
58 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 ...
8
votes
1answer
194 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 ...
1
vote
1answer
33 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 ...
2
votes
2answers
46 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, ...
0
votes
0answers
39 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 ...
2
votes
1answer
36 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 ...
1
vote
1answer
38 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': ...
1
vote
1answer
34 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
votes
2answers
129 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 ...
1
vote
1answer
91 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 ...
1
vote
1answer
63 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 ...
1
vote
1answer
45 views

What date was a table loaded into PostGIS

Is it possible to find out the date a table was loaded into a PostGIS schema using PgAdmin3? The tables are usually supplied from varying external sources.
1
vote
1answer
46 views

Copy tables from one server to another in PostgreSQL

I am trying to copy a number of tables from one server to another using PostgreSQL as part of reorganising our data structure. I am pretty new to PostgreSQL so haven't much experience with it. Is ...
2
votes
1answer
46 views

Polygon from line creation problem

I have a problem transforming a linestring into a polygon. The error is: ERROR: lwpoly_from_lwlines: shell must be closed So I checked but firstpoint and endpoint are the same. I tried to use ...
1
vote
1answer
40 views

PostGIS - ST_Difference query returns a dissolved result

I am using the ST_Difference to erase multipolygon feature by a mask. However, the query returns a dssolved multipolygon. The query is the following: '''SELECT ST_AsGeoJSON(ST_Collect(geom))::json ...
2
votes
1answer
83 views

Installed PostGIS extension not listed for database

I have a PostgreSQL database with the PostGIS extension enabled. I know that this extension is enabled, since I am using PostGIS functions, and I can actually see the PostGIS functions. However, ...
2
votes
1answer
46 views

Find nearest distinct features to a point

I am trying to select a single distinct features closest to an XY point in PostGIS. So I can find a single record for each distinct code by using: Select Distinct ON (code) * FROM table; Which ...
1
vote
1answer
44 views

Postgres Performance with Radius Searches

Im porting an application from mysql to postgres, and have several tables with 500k+ rows in each of geo points (lat, lon). In mysql i used a bounding box query with haversine to select rows within a ...
0
votes
0answers
32 views

insert row into postgis query table in QGIS

I find I am using QGIS (2.4) more and more as a client for PostGIS database tables with geometry, but also for tables without geometry, partly because it's good just to use the one application and ...
1
vote
2answers
69 views

Split lines into non-overlapping subsets based on points

Given a table with line geometry, and one or more points that are snapped to this line in a separate table, I would like to split each line with one or more intersecting points at each of the ...
1
vote
3answers
154 views

postgresql export database with command or pgAdmin III

I want to export my postgresql db with pgadmin. I search all of its GUI, I also searched the web and I don't find some sueful information. I know how to import the db into postgresql: create a db with ...
2
votes
1answer
98 views

SQL query to have a complete geojson feature from PostGIS

I would like to get a geojson feature with properties from PostGIS. I have found an example to have a feature collection but I can't make it works for just a feature. so far I tryed to modify the ...
0
votes
1answer
19 views

Road displays up to node, not up to starting point and ending point

SELECT id FROM table ORDER BY st_distance(the_geom, st_setsrid(st_makepoint($slng,$slat), 4326)) limit 1 ; get source and similar for target ; and then apply in dijkstra algo SELECT pgr_a('SELECT id ...
1
vote
0answers
50 views

PostGIS - Intersects feature to split into linestring

I would like to know if it's possible to intersect feature datasets (multipolygon, polygon, multilinestring and linestring) to get a result as a set of linestrings being split at each intersection ...
1
vote
2answers
59 views

select intersection of 2 geometries, polygon and polyline

I'm searching how to have a result of 2 geometries (villages and wetland) which don't intersect. When I write: select distinct v.name from villages v , wetland w where ST_intersects(w.geom,v.geom) ...