Questions tagged [postgis-2.0]

Version 2.0 of PostGIS brought a heavy set of new extensions for the PostgreSQL object-relational database, adding greater support for spatial objects.

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Detecting when vehicle has stopped [on hold]

I have live vehicle data coming to my postgres Table deviceId time(without zone) latitude longitude speed I am looking for query by which I can figure out when and where was vehicle stopped recently ...
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30 views

Optimal way to find points within polygon in PostGIS

I've developed an query to find points which are completely falls inside polygon by using PostgreSQL 10 and PostGIS 2.4 database. The query took long time (aprx 90mins) to produce the result. The ...
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32 views

Updating geometry as Multipolygon from Polygon table using PostGIS? [closed]

There are two tables in PostGIS. In which, one has polygon geometries with layer name wise and another one table has master layer name list. The requirement is to collect the polygon geometries as ...
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2answers
51 views

How to get number of Lane from OSM?

I am using OSM for my project, I have downloaded data from http://download.geofabrik.de/ in the OSM file and imported the data in POSTGIS, In the planet_osm_roads, I am not able to see any key related ...
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33 views

How to speed up PostGIS intersects query?

I have a table which contains 5,00,000 records. I want to fetch all the rows which intersects with the given bounding box. My query is: select * from data_master b where b.geom && '...
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34 views

PostGIS ST_Within processing speed

I've created an SQL script that selects a given set of polygons ("v_rag_RenouvellementClaim") that are completeley within a specified buffer ("v_rag_RenouvellementClaimGrtr25000_Buffer") using PostGIS ...
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69 views

Map Matching between two geometry (line string)

I have two tables in PostGIS, both having line string as the geometry type. I wanted to extract a similar or exact matching street. Can you please suggest query or algorithm for it? Table 1 column ...
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1answer
131 views

Installing PostGIS after PostgreSQL Ubuntu 18.04

sudo apt-get install postgresql-9.5-postgis-2.5 returns a series of errors: The following packages have unmet dependencies: postgresql-9.5-postgis-2.5 : Depends: libgdal1i (>= 1.9.0) but it is ...
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1answer
39 views

ST_Centroid in view produces geometry without further definition from geometry(polygon, ssid)

I'm a Postgresql novice. In a postgresql 9.2 + PostGIS instance I have one table with a geometry(polygon, ssid) column. From this table I am trying to create a view using ST_Centroid like so: ...
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1answer
28 views

How to get the rectangular coordinates from list of line string

I have a linestring geometry in my PostgreSQL database. I want to get the corner coordinates of the rectangular bounding box. Example "...
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1answer
108 views

Getting Latitude and Longitude from a Linestring

I have a linestring geometry in my Postgres database. I wanted to extract the latitude-longitude coordinates of each point inside the linestring. Example "...
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162 views

In QGIS, How to add the database connection in DB Manager via Python [closed]

I am using QGIS 3.0.2 I want to add connection settings in DB Manager via Python script. is it possible ? (I am interested in PostGIS and Oracle Spatial for now) This script will save the ...
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3answers
2k views

How to solve “libintl-9.dll is missing” when trying to run PostGIS 2.0 Shapefile and DBF Loader Exporter

When I try to run PostGIS 2.0 Shapefile and DBF Loader Exporter I get the following error: The program can't start because libintl-9.dll is missing from your computer. Try reinstalling the ...
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1answer
74 views

Intersection of touching geometries returns a polygon

I'm using Postgis 2.3. I have two touching geometries that I got from an overlay (ST_Difference) operation: id | st_astext 3 | MULTIPOLYGON(((0 -2,0 ...
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82 views

Publishing web service using QGIS? [closed]

I want to show different types of surveyed land parcels which are available in shapefile format, in our country map. That map will be published in a web site and it will be available for surveyors. ...
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1answer
186 views

Postgis 2 - ST_area : huge difference between 3857 and 4326

I've been doing tests between projections with Postgis 2.3 and I was surprised by the result of the ST_area function with the Web Mercator projection (3857). Here is a sample query and result on a ...
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2answers
56 views

Problem While Selecting from table using ST_Transform

This following query is not returning any values SELECT * FROM leads WHERE leads.latlong && ST_Transform( ST_MakeEnvelope(78.2137, 12.5186, 78.2460, 12.5419, 4326),3587); Results like: ...
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1answer
48 views

How to migrate PostGIS databases between Postgres versions?

Mac OS I am trying to upgrade my Postgres version 9.2 to 9.6 and failing. My strategy was to follow the standard advice for Postgres databases and use pg_dumpall. This does not appear to work if ...
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2answers
152 views

PostgreSQL is loading wrong PostGIS library

I am attempting to upgrade my version of PostgreSQL (from 9.2 to 9.6) on a Mac running 10.13.5. I used pg_dumpall to backup the 9.2 database as per the instructions in the postgres documentation ...
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1answer
271 views

MySQL 8 MBRIntersects 10 times slower than PostGIS equivalent

I'm trying to migrate a PostGIS database to MySQL 8 and am having a big performance hit when it comes to MBRIntersects. Using Mapbox to render vector tiles, I need to extract geometry intersecting ...
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0answers
55 views

pgsql2shp issue when using WITH clause

I'm using pgsql2shp.exe from a Windows batch file and I get an error when using a WITH clause: "C:\Program Files\PostgreSQL\9.4\bin\pgsql2shp.exe" [ ... ] "WITH test AS (SELECT gid, the_geom FROM ...
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86 views

Issue editing nodes on a PostGIS table via QGIS

I launch a PostGIS table via QGIS DB Manager tool [PostgreSQL 9.4.17 - PostGIS 2.1.8 - QGIS 2.18.19]. The table geometry is MultiPolygon. I can toggle both Toggle editing and Node tool buttons. When I ...
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1answer
137 views

OSM2PGSQL - Openstreetmap Tiles showing no detail at certain levels

I recently built myself a Map server using this guide: https://www.linuxbabe.com/linux-server/openstreetmap-tile-server-ubuntu-16-04 This has worked really well to an extent. I have however noticed ...
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73 views

Using postgis to rasterize a set of points grouping by time

I have used postgis for vector operations for years, but have recently begun a project mixing vector and raster data and I am bit confused as to what is the best way to do what I want to do. I have ...
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1answer
484 views

Get ST_SummaryStats from Raster Table using geoJSON polygon

I have a raster dataset imported into POSTGIS with SRS 3857. This table is named as prcp0000_normal3857. The dataset represents statewide precipitation in Montana and can be downloaded below. ftp://...
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250 views

POSTGIS to dissolve all features

I have a multi polygon with spatial field layer with and 3000 records and I want to use dissolve all in 1 record. On DISSOLVE algorithm in QGIS you have a choose to dissolve all features from layer ...
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2answers
280 views

PostgreSQL query using GROUP BY question [closed]

I have a polygon layer table in PostgreSQL and I want to create a simple query using GROUP BY . Here my fields : fid field1 -- ---- 1 text1 1 text2 1 text3 2 text1 3 text4 ...
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78 views

Two geometries not at same place

In the picture1 shown there is a linestring which is Area2 and a buffer of linestring which is Area1. I want to include Area2(linestring in picture) in the buffer but I cannot increase the size of the ...
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142 views

how to split polyline where start/endpoints of the linestring touches or intersects with the nearby lines in qgis using python or postgis [closed]

I have a line layer and i want to find if the start/endpoints of the linestring touches or intersects with the nearby lines in qgis using python. I have tried the following code but it is not ...
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0answers
255 views

PostGis stopped working: Invalid access to memory location

I have a PostgreSQL v9.3 database with PostGIS 2.1.8 running locally on Win10 Creative Update 64-Bit. This database is running for months without any problem. I've used it yesterday afternoon. This ...
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2answers
74 views

How to get list of empty parcels (without building)

I have 2 table: 1. parcel 2. building How to get list of empty parcels (without building)? I can get parcel with building by use: ST_DWithin(parcel.geom, building.geom, 0) ...so i made my own ...
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406 views

How To Use ST_Union in PostgreSql?

I have a spatial table (polygons,polylines) in a database. These are digitized by multiple people. For example, a state is divided into multiple Grids and given to multiple people to digitize using ...
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109 views

Updating PostGIS layer from another vector layer in QGIS?

I have a vector layer that contains way points that I load using "load vector layer" from a gpx file. I am attempting to add these new points to an existing postgis layer by simply copying and ...
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1answer
288 views

Loading Tiger Data, and populating missing table data (such as tabblock)

I'm working with postgis and followed many tutorials out there to try to use tiger data. this one seems to be the best: https://bluehatrecord.wordpress.com/2015/07/06/installing-the-tiger-geocoder-...
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2answers
136 views

Setting up pgRouting

I'm following anita Graser's process (https://anitagraser.com/2011/05/13/catchment-areas-with-pgrouting-driving_distance/) and I don't know how to add LANGUAGE C. When I try to execute routing_dd.sql ...
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1answer
164 views

Error while importing geotiff file into postgresql database in linux platform

I am trying to import GeoTIFF file into spatially enabled PostgreSQL database. Using command: raster2pgsql -s 4326 -C -F -a path/to/geotiff/file public.table_name | psql -d database_name -U ...
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1answer
967 views

Updating the Entry in geometry_columns for Spatial Table Created from a Query

I created a spatial table from a query. Now, I notice in geometry_columns, the following entry for the table: f_table_catalog | f_table_schema | f_table_name | f_geometry_column | ...
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1answer
150 views

I would like to extract 'landuse' information from OSM data using postgis

I am trying to extract OSM land use information for a given bounding box in PostGIS. Using this example I wrote my code: SELECT * FROM planet_osm_polygon WHERE planet_osm_polygon.landuse &&...
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45 views

ST_Transform Displaced Locations

Ive updated my spatial_ref_sys table in postgres with spatial reference statement from http://spatialreference.org/ref/esri/102737/. I can perform the tranformation from srid 4326 to srid 102737 and ...
2
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1answer
405 views

Strange slow behavior of a very simple query utilizing single PointField field

Infrastructure on AWS RDS: PostgreSQL= 9.6.1 POSTGIS="2.3.0 r15146" GEOS="3.5.0-CAPI-1.9.0 r4084" PROJ="Rel. 4.9.2, 08 September 2015" GDAL="GDAL 2.1.1, released 2 016/07/07" LIBXML="2.9.1" LIBJSON="...
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1answer
4k views

How to find points within a polygon in PostGIS

I have a series of lat and long coordinates I've loaded into a spacial table (Nov01) in PostGIS, and I've created a geometry column in the table. I also have a shapefile (greatermanchester) I've ...
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0answers
526 views

java.lang.IllegalArgumentException: Can't convert object of type org.postgresql.util.PGobject

I am trying to fetch GIS data using nativeSQLQuery, but I am facng below issue. Stack Trace: java.lang.IllegalArgumentException: Can't convert object of type org.postgresql.util.PGobject ...
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1answer
453 views

PostGIS: how to split a polyline into straight segments? [duplicate]

I'm working with PostGIS 2.1.8. I need to split a polyline into as many straight segments this polyline contains. Here is an illustration to make it clear enough: The initial feature is only one row ...
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1answer
196 views

Limit ST_DWithin() to first candidate found

Im trying to create a table with distances calculated from points to lines. For that im using the following SQL adapted from BOSTON gis website. I understood the function seems to search for all ...
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1answer
169 views

Upgrading PostGIS and PostgreSQL but running upgrade to PostgreSQL it errors?

I want to upgrade PostGIS(2.0.4 ---> 2.2.3) and PostgreSQL (9.2.4 ----> 9.6) so First I upgrade PostGIS 1、install PostGIS 2.2.3 on postgresql 9.2.4 2、alter EXTENSION postgis 2.0.4 ---&...
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0answers
254 views

Querying for All OSM Street Intersections in PostGIS

I created a GIS database using an OSM datafile for a single city (from Geofabrik) and imported it into PostGIS using osm2pgsql. I have around 180K rows in osm_planet_line database, a manageable sie. ...
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0answers
55 views

GRASS plugin to QGIS [closed]

I want to work on QGIS using GRASS HRU. it needs QGIS software to boot first, but it is not booting. I tried reinstalling the software also. I can open GRASS but its not giving any result. I ...
2
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1answer
109 views

Exporting All Streets in a City - Multiple Lines, With Latitude and Longitude

I installed Postgresql, Gis, SELECT postgis_full_version() reports, POSTGIS="2.2.2 r14797" GEOS="3.5.0-CAPI-1.9.0 r4084" PROJ="Rel. 4.9.2, 08 September 2015" GDAL="GDAL 1.11.3, released 2015/09/16" ...
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3answers
275 views

Routing network from database created by osm2pgsql

I created my PostGIS database by osm2pgsql tool and now I want create network suitable for routing. (I could not use directly osm2pgrouting because I need street names e.g. and so on). For this ...
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0answers
395 views

QGIS & PostGIS: Layer not valid - not loaded

I've been having some issues with PostGIS and QGIS. I'm trying to connect to a PostGIS database, and retreive a layer called MargamParkMap (in Schema MargamPark) No warning triangle (like the views - ...