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

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postgis loader osm shapefile

I downloaded the map of my city already in shapefile into postgis http://metro.teczno.com/ to load in order to consult routes using pgRouting. Iss happening the error: http://metro.teczno.com/ ...
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8 views

How to configure osm2po to ignore certain class types?

I'm trying to import data using osm2po but am only interested in driving distances, so I'd like to omit all footway, cycleway, steps, etc. in the imported dataset. How can I configure osm2po to do ...
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34 views

Counting self intersections of linestring using PostGIS?

Is there a way of using PostgreSQL + PostGIS for finding the number of self intersections in a linestring? I have a linestring that goes forward but in circles, and I need to find the number of times ...
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1answer
20 views

Issues ST_MakePoint in PostGIS with Geoserver

I am trying to setup a GIS system to use PostGIS and Geoserver. I have loaded all of the data into a table. The data that is received has long/lat coordinates in Degrees, Minutes, Seconds, Direction, ...
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16 views

Text in POSTGIS Raster

Is it possible to add text/annotation to a raster generated in Postgis raster? Specifically I need to do this within the database if possible and am looking for an option that does not require an ...
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2answers
23 views

How to extract a new linestring vector from a existing multipolygon in QGIS?

What I want to do: create a new line (named linestring in Postgis?) from existing multipolygon layer in Postgis. Purpose: once these lines are created, I'll run some distance calcs from specific ...
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27 views

Calculating driving distance from many nodes (sources) to one target using PgRouting?

I'm using a PostGIS / pgRouting database setup with a road network. And I want to calculate a driving distance and shortest path from many sources to one target. I found that pgr_kDijkstra can ...
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158 views

What is the internal format of PostGIS?

PostGIS stores its geometry entities as long strings: SELECT ST_GeomFromText('POINT(32.0 34.0)',4326); st_geomfromtext ---------------------------------------------------- ...
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30 views

What is best way to reorganize osm into PostGIS database entity?

I'm just wondering how to reorganize the OSM given entity to more flexible and schematic purpose. The OSM gave 4 entities the planet_osm_line, planet_osm_point, planet_osm_polygon and ...
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1answer
22 views

ST_ClosestPoint in 2D but retaining Z value

I have a query in PostGIS where I have a two geometries, a MultiLineStringZ and a Point. I want to find the 3D point on the MultiLineStringZ closest to the Point by it's flat 2D plane distance, so ...
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21 views

pgRouting pgr_tsp() not returning results when used with SQL parameter

I’m trying to solve the travelling salesman problem with locations pulled from a database, e.g.: mydb=# SELECT id::integer, location_lng::float AS x, location_lat::float AS y FROM addresses where ...
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41 views

How to create a vector layer from a GeoAlchemy2 query?

I'm currently developing a QGIS plugin where I mapped a PostGIS database via GeoAlchemy2. I wrote a function that returns results from a GeoAlchemy query but have no idea how to create a vector ...
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3answers
68 views

Offline Map Service with Mapnik and Leaflet

I'm relatively new to GIS, so I hope my asking doesn't appear to be ignorant in any way. I currently work on an offline map service solution for usage in areas without internet connection. For that ...
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1answer
29 views

Mapnik + OpenStreetMap + Shapefile with Raster Images + Mod Tile + PostGIS

I am new to GIS. I have a Shapefile (.shp, .shx and .pbf). The .pbf file contains path to PNG files located on my machine only. I was able to save the Shp data to PostGis via Shape2Gis tool. Now ...
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1answer
28 views

How to add a new permanent column that contains result from ST_AREA select queries

I am a total newbie here, I have a bunch of polygons in my cartodb map, and I want to create a new column called "AREA" in the table MY_TABLE that contains values from my area calculation query: ...
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2answers
27 views

Keeping up to date with OSM changes in pgRouting

I'm working on a routing application using OSM and pgRouting. I'm only interested in a subset of data, mostly North America (performance was difficult for large amounts of data, so don't want to use ...
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16 views

How to easily remove loose/isolated edges from pgRouting network?

I wondered if there's an easy way to 'clean up' a pgRouting network by removing those edges that do not connect with the global network. Otherwise you risk to end up with cost values of -1, meaning ...
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2answers
84 views

Growth of a PostGIS database for Social Media - Move to Cassandra?

I currently have a large and growing database of geo-social media. I'm using Postgres with postgis, and so far it's been quite good. My use case thus far has been to query the database for all posts ...
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1answer
32 views

How to rename PostgreSQL/PostGIS columns while importing Shapefiles?

I discovered shp2psql to successfully import geospatial data from ESRI Shapefiles into PostgreSQL/PostGIS. Now I would like to automatically rename the target column names. Is there any mechanism ...
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14 views

Debugging ogr2ogr “AddGeometryColumn failed” and “Terminating translation prematurely after failed translation of layer”

As noted in the title, I'm getting the following error: ERROR 1: AddGeometryColumn failed for layer pretty_polys, layer creation has failed. ERROR 1: Terminating translation prematurely after failed ...
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34 views

Editing PostGIS data in ArcGIS Desktop?

Quick question regarding editing PostGIS data in ArcMap 10.0. Far as I can tell, this can only be accomplished through third-party plugins like GISSquirrel or ST-Links. Does anyone know of an ...
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12 views

Why is there greyed dupplicated table in Add PostGIS Layers dialog in QGIS 2.X

Does somebody knows why PostGIS 2.X tables are duplicated and greyed in the "Add PostGIS Layers" dialog in QGIS 2.X.? One is coloured with geometry type recognised the other is greyed with unknown ...
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15 views

Calculate distance between point and linestring, save the distance as table and represent that on QGIS? [duplicate]

I have loaded my data with osm2pgrouting and I have my network with ways (Linestring) and nodes (Point). The problem is : I have a database of doctors addresses (point) and I should calculate the ...
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11 views

Optimize Tilemill export of project with contour-lines

I have a project in Tilemill (based on OSM-Bright) that covers Europe and also displays Contour-Lines. My problem is that the performance is pretty bad when exporting my map. I've already seen that ...
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1answer
18 views

ST_Intersects returning incorrect result on routing problem

I have a table that contains the shortest path between destinations for survey respondents on an osm2po created network. When calculating the shortest path result, I store the geometry in a column. ...
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28 views

Get points along a line at defined distance

I was reading a lot of similar questions here but no one ask about postgis (or I didn't find it). I have a line in postgis and I want to get the point along the line at defined distance. It is ...
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1answer
38 views

Calculate distance between point and linestring and how to represent that on QGIS?

I have loaded my data with osm2pgrouting and I have my network with ways (Linestring) and nodes (Point). The problem is : I have a database of doctors addresses (point) and I should calculate the ...
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1answer
33 views

Converting a JOSM indoor map to QGIS

I have created an OpenStreeMap layer of the indoor of a bulding by following this tutorial: https://wiki.openstreetmap.org/wiki/IndoorOSM, since that is only a proposed tagging schema for indoor ...
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20 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. ...
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1answer
50 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 ...
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22 views

Merge overlapping GeoJSON GeometryCollections

I need to merge three overlapping GeoJSON GeometryCollections of Polygon. Ultimately, the end result needs to be a geom type for PostGIS (e.g. MULTIPOLYGON) so I can easily check if particular points ...
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15 views

Convert ArcGIS gdb with coded domains to Postgres / PostGIS [duplicate]

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 ...
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1answer
50 views

How do I calculate driving distance to Amarillo, TX from all Texas cities using zipcode data? [closed]

I have a dataset that contains the zipcode of all cities in Texas. I want to find the distance of all these cities in Texas to ...Amarillo,TX Example: Borger, TX------Amarillo,TX ...
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1answer
115 views

Empty geometries in GEOMETRYCOLLECTION

I just noticed some strange behavior in PostGIS, with respect to WKT parsing. A GeometryCollection containing 1 or more empty geometries postgis_test=# SELECT ...
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1answer
32 views

Is this correct behavior for ST_ConcaveHull (PostGIS)?

I'm getting this error on the ST_ConcaveHull function call and after reading the docs, I'm unclear as to whether this Error is correct behavior or not. Here is the business end of the query (vx are ...
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1answer
30 views

Postgis create polygon extent/convex hull from spatial table

Please help, I have a polygon layer representing building footprints. I want to create new view in postgis that will contain rectangle representing bounding box and also another view that will have ...
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1answer
62 views

How to union polygons and add attribute values of combined output features

I have a layer containing 10 polygons all overlapping at various locations. Each polygon has a value of '1' in a column called "value" How do I Union the polygons (rows) together such that the ...
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34 views

Looking for free tools to automatically generate spatial data catalogue

I've recently inherited a whole bunch of spatial data (mostly shapefiles but some .gdbs) which relate to a bunch of different cities. I'm looking for a way to take an inventory of what data I've got ...
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3answers
50 views

Problem with Geometry SRID in PostGIS

i ceated my table (borne) in PostGIS id_borne serial NOT NULL, num_borne character varying, shape_borne geometry and i changed the SRID of my table with succes using select ...
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1answer
67 views

QGIS to solve projection mystery in Postgresql

I downloaded some data from local agency. Per QGIS 2.2, I defined the projection to 'EPSG:3587 - NAD83(NSRS2007) / Michigan Central' in postgresql (maybe ArcMap). Data is in Postgresql 9.3. I am ...
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1answer
63 views

Postgis: Traslate geometry from EPSG:23030 to EPSG:21818, then to lat long

I'm from Colombia, South America. I'm a computer programming student and I have to develop a prototype for a GIS system for my small home town using Postgis >= 2.0 as database back-end. The local ...
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1answer
26 views

Run PostGIS command line functions in pgAdmin?

Is it possible to utilize the PostGIS command line functions, e.g. shp2pgsql, from within pgAdmin III? I am using pgAdmin to connect to a remote server.
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39 views

how to determine the direction in point-in-polygon

I am very new to GIS and I am wondering if the following problem could be solved or not. Given that there are three pairs of points(A<-B, C->D, E<-F) Each pair of points has a direction and ...
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1answer
44 views

Force St_split() to return geometries in specific pattern

I'm Using PostGIS st_split() to split a polygon geometry by a linestring. Then I use st_dump() to return each of the splitted geometry and it is working fine. But the issue is I want to force ...
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3answers
75 views

How to Build a graph from a map

I spent days looking in all questions here and trying tutorials. I need to build a graph for a region (It will be my input in simulation) I downloaded Postgresql and Postgis and osm2pgsql. Now i can ...
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1answer
30 views

How to extend a straight line in postgis?

I have a postgis table of simple linestrings, each one is a straight line with just two points. I want to select every linestring, but extended from both sides by 1 meter. So i have lines, that are ...
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1answer
20 views

ERROR: Operation on two geometries with different SRIDs

I'm new when it comes to GIS and PostgreSQL. I have searched everywhere for the cause of this problem but I can't find the solution. I was following the documentation here First i created a table: ...
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24 views

Remove TileStache cache for a single feature

In a large parcel map, features are edited and need to be re-styled. I want to keep as much of the cache as possible, but invalidate the cache for features that are edited when the features are saved. ...
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2answers
36 views

Missing some lines after import of .PBF int PostGIS

I've a little problem with either the initial data (from Geofabrik) or the import (using osm2pgsql): I can't find some lines of a street in my city in the database while they are there on the OSM-Site ...
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2answers
41 views

Defining OID causes Query Layer on PostGIS to disappear from ArcMap?

I used query layer to load my layer from PostGIS and show it in ArcMap 10, I had two cases; if I defined the OID in the configuration of connection, there was no problem with the attribute table of ...