A command used to retrieve information from a database

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1answer
291 views

select by location point in polygon with sql query

I have 2 tables table a this one a polygon layer with 10000 records table b this one a point layer with 600000 records in postgresql geodatabase i select a polygon feature with the query by input ...
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0answers
62 views

Getting connected points in intersection from OpenStreetMap using PostGIS?

I'm trying to get the points that connected with the intersections. suppose that I know the point of the intersection (if we see in the pictures, I represent the intersections as black node). Now I'...
0
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1answer
273 views

Query table names

I want to query a table in my postgis table named Seg_060_2009 using psycopg2 and cant seem to get my query to execute. The query will execute if I name the talbe layer. Are there restrictions on ...
0
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1answer
241 views

Database queries using GeoServer? [closed]

I am new to GeoServer. I have a PostGIS database and GeoServer setup. How can I query the database using the GeoServer/ Boundless SDK? I have OpenGeo Suite 4.6 and I am trying to query the database ...
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3answers
452 views

Extracting difference between two massive shapefiles using QGIS?

I have two massive shapefiles and I need to create a difference shapefile output between the two. I have a layer where I have satellite coverage (orange) and then a layer where I have high resolution ...
1
vote
1answer
111 views

Running spatial query on huge table [duplicate]

I've got two tables conatining geometry: 1 containing big polygon's (regions, srid=4326) and another containing smaller polygon's (pand, srid=28992, containg ~9.9milion rows) By using one of the big ...
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2answers
228 views

Can't import certain tables from SQL Server to QGIS

This is a list of 193 zip codes and their geometries that do not import in QGIS. This is a list of 999 Census Block Groups and their geometries that do import in QGIS. This is the Add MSSQL Layer ...
1
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1answer
243 views

How to concatenate values from postgis table which have the same id into a new column? [closed]

I have the following table in postgres-9.3 postgis 2.1. (geom values is too long , I cut to make it short in below table): id | name | geom ------------------------- 12 | A | "01030000000" 12 | ...
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0answers
297 views

ArcMap ObjectID seems to be getting changed, any ideas what might be doing it?

I am working with ArcMap10.0 and MDB's, often creating Definition Queries based off my ObjectID with the understanding that this unique identifier should not change over time. ie. if I create ...
0
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1answer
467 views

Querying GeoJSON polygons from Django models in Leaflet?

Am developing an application in GeoDjango and using Leaflet to show my data.I have loaded my data successfully into the map and added a sidebar where I have my textboxes to input values and a search ...
0
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1answer
106 views

Using Python parser of ArcGIS Field Calculator to populate values in one field based on those in another?

I am trying to populate a field with a sorting code that represents the value of another field. Example: EXPCODE|SORT| S4DNN2 |3.5 H2BNN2 5.0 EXPCODE is a field with a value like "S4DNN2." SORT ...
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1answer
181 views

Fast way to check if postgis bounding box contains any points/linestrings

I have a bounding box given and want to know if this bounding box contains (or better intersects) any points or linestrings. So the query should return true if the first point/linestring was found and ...
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2answers
372 views

How to populate a table with geom line? [closed]

I have the coordinates of a lot of points in a table. In pgadmin I want to make a line that passes on these points. I already have my Coordinate point im my table. I want to make line with those ...
3
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1answer
446 views

PostGIS - ST_Within or ST_Disjoint performance issues

I have a table of about 150,000 points in PostGIS with a spatial index and a SRID of 27700 (OS). I want to select the points that fall outside England and Wales. I have a multipolygon table with ...
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2answers
327 views

CMV Attributes Table issue

I've created a CMV query widget that I am trying to link up with the Attribute Table widget. The table tab is being created in the bottom pane but that's as far as I'm able to get. I'm unable to get ...
0
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2answers
161 views

Postgis: Query ST_DWithin in square instead of circle

The ST_DWithin query queries all geometries within a certain radius from another geometry (in my case a point). For performance optimization of my application I want to query in a square. So that the ...
3
votes
1answer
122 views

QGIS 2.8.1-wien: how to unselect multiple layers from imported dxf?

I'm using the following syntax within the query builder in order to unselect a layer from a dxf added as a vector to the project: 'Layer' NOT LIKE '15%' It works but now I want to deselect some ...
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0answers
318 views

ESRI JavaScript API Web Application and SQL Queries in ASP.NET?

My workflow (and security restrictions) for a new html/javascript based web application is making me think that I could program an ASP.NET application, inside which I load the 'map' and the 'legends' ...
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0answers
98 views

QGIS expression: select from <layer> possible?

I have a project file with many nested layers and would like to query certain layers without having to click on them first. The expression tool however requires me to select the layer I want to query. ...
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1answer
89 views

Coordinates from a SQL Server Inserts don't Show Results

I am trying to parse a JSON output file from an .Mxd file. All work fine and the following SQL Insert in SSMS using sample coordinates: delete from RoomData insert into RoomData (Building_ID,Room,...
1
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1answer
176 views

How to get all the LineStrings of a street using PostGIS with OSM

I want to get all parts of a given street. I use a query like: Select * from planet_osm_lines where name = 'mystreet' As a result I get all the LineStrings that are part of a street with the ...
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0answers
69 views

Distribution of POI query result

There are a lot of POIS in the database with fileds id name address lon lat. When we tried to query some points for a given bounding box, it is simple to build the accordingly sql and get the results,...
2
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1answer
582 views

How to apply a filter to multiple vector layers in QGIS?

I am trying to apply an attribute filter to multiple layers in QGIS at once. The filter is to be applied to .osm data brought in through PostGIS to QGIS. I have tried selecting multiple layers -> ...
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0answers
89 views

How to get a specific street using OSM with PostGis

I want to get the polygon form a specific street from the OSM data importtes with osm2pqsql using PostGis. Since the streetname isn't the only identifier I wanted to add the postal code as a second ...
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0answers
305 views

ArcGIS Android syncing geodatabase does not work after downloading it with LayerQueries

I need to download a geodatabase from ArcGIS server using layer IDs and LayerQueries in database parameter class and then be able to sync both ways. The ArcGIS Android API examples are only based on ...
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0answers
42 views

How to work with SRID using PostGIS [duplicate]

I am using PostGIS with OSM Data from Geofabrik that covers the complete area of Austria. I am used to work with calissical longitude and latitude. If you enter Vienna, Austria in http://itouchmap.com/...
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2answers
119 views

How to implement a radius search using PostGIS

I am very new to this topic and after a long time of research I didn't find a solution. I want a query that I can use on my PostGIS database performing a radiussearch.. I inserted the Open Street Map ...
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0answers
68 views

Syntax error drivingdistance

I am new in sql and i am trying to get that works a subquery with pgr_drivingdistance and pgr_pointsaspolygon but i get the next error: subqueries in FROM must to have an alias,for example, FROM (...
8
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2answers
279 views

Find headwater polygons

This is a follow up question to this question. I have a river network (multiline) and some drainage polygons (see picture below). My goal is to select only the headwater polygons (green). With ...
1
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1answer
45 views

ST_AsLatLonText () rounded

I know this is a POSTGIS question… I set a field with UPDATE members SET latlong_degree = ST_AsLatLonText (the_geom) But the result is (for example) 48°37’41.742”N 9°17’55.716”E The seconds part ...
6
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2answers
539 views

Find start of river

Edit: Follow-up question here (= Find headwater polygons). How can I determine the start of a river in PostGIS? I have a river network (Multiline) and want to find the startpoints of the rivers. ...
2
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2answers
185 views

QGIS keyboard shortcut to launch a 'Select by expression' query

I can't find if it is possible to launch a 'Select by expression' query (not to open the dialog) with a keyboard shortcut. I can't find this option in the Settings > Configure shortcuts list... If ...
3
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1answer
147 views

Cemetery Grave/Person Locator

I'm a mediocre to intermediate ArcGIS user. I have created several point shapefiles, one for each section of a national cemetery, roughly 200-600 points in each section in a grid. Attached to these ...
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0answers
67 views

Query does not work on joined file

Using QGIS 2.6.1 Brighton on an IMac (10.8.5). QGIS 1.8 Lisboa with exactly the same two vector shapefiles and the same CSV file works. I joined the file containing the polygons showing the features ...
2
votes
4answers
781 views

PostGIS doesn't use spatial index with ST_Intersects

I imported the data from openstreetmap using osm2pgsql and copied it another table structure. If I made a query for containing rows using st_intersects, st_contain or someone else, postgis don't use ...
0
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1answer
160 views

Write a query to find all geometries within a distance using ST_DWithin

I have written a query in PostGIS in which I use the ST_DWithin function to get the geometries which are located in a certain distance: SELECT images.path, focnetworkpart.__gid FROM images INNER ...
0
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1answer
165 views

Connecting to ArcSDE with arcpy is slow (ArcSDESQLExecute)

I'm creating an API which will allow queries to be performed on my GeoDatabase. I'm using ArcSDESQLExecute to connect to ArcSDE (backed with an Oracle database). Creating the connection object is very ...
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0answers
67 views

PostGIS ST_Contains query return empty

Hopefully I explain this properly. I am trying to check if a route falls into another route I have created. The route is saved as a linestring. My search query is: SELECT id FROM routes WHERE ...
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0answers
99 views

How to query a bunch of tables/feature classes which linked together by relationships

I have one feature class and 3 tables which linked together by relationship classes. The feature class, called "buildings", has the fellowing feilds: (1) FID: Feature ID and (2) ID: My own ID This ...
1
vote
1answer
229 views

SQL-Like Inner Join on IDs in Two Layers in QGIS

Using QGIS v2.6.0-Brighton. This question is not about editing layers geographically in anyway. It is merely trying to find data from two layers as you would in an SQL Query and append an extra ID to ...
1
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2answers
856 views

How can I calculate how many of a certain feature lie within my various buffer rings?

I am using ArcMap and I have a series of real estate parcels mapped along with a series of wind turbines. I have created multiple buffer rings around each real estate parcel with distances (0.5, 1, 1....
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0answers
2k views

SQL Server : find Intersecting geometries with a geometry using sql query

I asked this question on parallel site (h++p://stackoverflow.com)and think this is a better place to ask such questions I want to find all geometries in a table that intersects with spacial geometry ...
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0answers
69 views

Using statisticdefintion in a querytask

I have a question about using QueryTask to accomplish to jobs: Identify unique value for a county in a graphics layer via mouseover. This unique county value (from a specified field) is used to ...
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0answers
47 views

Simple query not returning values

I have a super simple select by attribute query "Coefficient" = #, the #'s are 0, .2, .3, etc... to 1. The query will select some of the #s but not others. Example) when I query 0,1,.5 the attributes ...
2
votes
1answer
47 views

Why does my query not run since SRID are the same?

I am running this query: SELECT source,ST_AsText(ST_ClosestPoint(roads.geom,ST_GeomFromText('POINT(22.256 39.569)'))) FROM roads ORDER BY ST_Distance(roads.geom,ST_GeomFromText('POINT(22.256 39....
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2answers
248 views

How to visualize pgrouting result?

So I use this query SELECT seq, id1 AS node, id2 AS edge, cost FROM pgr_dijkstra(' SELECT gid AS id, source::integer, target::...
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0answers
309 views

How to send parameter to mapfile from javascript with query to show map in browser?

I try to send parameter to mapfile but it's seem it didn't work very well. Can anyone help me find solution please? Here's my mapfile webgis.map MAP NAME "Banda_Aceh" SIZE 2000 900 UNITS dd ...
2
votes
1answer
280 views

Filter query error in QGIS2.4 or 2.6

I get this error when undertaking in query in QGIS2.4 or QGIS2.6: An error occurred when executing the query. The data provider said: OGR[3] error 1: Unrecognised field name Fire....
0
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1answer
103 views

SpatiaLite - WITH, view or sub-query?

I am running on Windows 8.1 SpatiaLite_gui 1.8.0, SpatiaLite version 4.2.0 and SQLite 3.8.5. I need to interrogate one single spatial table whith those attributes: ID | val | val_1 | val_2 | Geom ...
0
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1answer
51 views

Spatial query to make view

I've got two tables which I want to combine and enrich with each others data. I'm getting stuck on the join part, as this needs to be done via a spatial query. First the table structure: a table with ...