Questions tagged [database]

One or more structured sets of persistent data, managed and stored as a unit and generally associated with software to update and query the data.

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43 views

Many to many relationship in a QGIS Geopackage - fail

The current user manual has been unsuccessful in directing me to establish a many to many db relationship in a geopackage in QGIS (3.10.2 on Ubuntu w gdal 2x). After the airlines in the manual ...
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1answer
54 views

Transfer & maintain a relational database in QGIS - backend vs frontend

I'm going to set up a small db for my own use in QGIS. I can see only a few of the many tables will be spatial, but the ease of use and capacity of the widgets in QGIS are attractive. I won't writing (...
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20 views

Spatial similarity between polygons

I am using PostGIS and python3. I have a table with polygons objects, the polygons have year as an attribute. I need to identify the uniqueness of the polygons trough time. For instance I need to ...
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26 views

Tenant isolation in SaaS product based on PostGIS - do the same concepts as PostgreSQL apply?

We're working on two different GIS apps and we're a bit torn around how to provide a level of tenant data isolation on our GIS systems. System A would need to have strong tenant data isolation where ...
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1answer
30 views

QGIS 2.18.13 Points at intersections have More Information with the ID than what is in the database fields?

Created Point Feature Class at all street intersections. When looking at the database fields I only get two fields yet when i use the Info tool I get several paragraphs of information including the ...
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1answer
626 views

Using an ArcSDE Connection through Python

I would like to run a script on a ArcSDE feature class. The script runs perfectly when I hard code a shapefile, but is unable to connect to an ArcSDE database. The purpose of the script is to assign ...
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1answer
133 views

Exporting data to a text file using a template

I've build a toolbox in my project environment to plan "Aids to Navigation". The vessel (ship) that does the actual work in the field has a navigation computer that can only import waypoint. These ...
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1answer
248 views

Appending columns from a table to my active table?

I am trying to append three columns from srs2016 to srs2013_1 using this sql. INSERT INTO srs2013_1 (the_geom, agency_responsible, description) SELECT the_geom, agency_responsible, ...
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13 views

Database Population in wrong Authentication Type

I've populated a database while connected to it as an editor with an Operating System Authentication Type. I should have populated it while connected to the Database as the GIS administrator with a ...
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1answer
2k views

Filemaker interface with QGIS

I have created a map of features on an archaeological site. The artifact inventory is in FileMaker Pro 12. Rather than creating a CSV file and using that as the attribute table, I would rather, if ...
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2answers
275 views

Geoserver+postgis: how to complete creating database via REST API?

I'm using geoserver 2.13.1 with postgres 9.5 and postgis 2.4.2. I am trying to use REST api to create workspace (works) and in it a datastore of postgis type. I have already prepared a template ...
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1answer
44 views

How to find closest point on a line from a point in Oracle Spatial?

I want to find the nearest point on a line from a point in Oracle Spatial. I know how to do in SQL Server and PostgreSQL but could not find anything about Oracle. I have used MDSYS.sdo_nn to find the ...
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2answers
41 views

QGIS style to DB

I want to import the style from a MapInfo.tab file into a postgis db. When I open the properties for the file and click on the botton style I only have the option save as QGIS QML style file or SLD ...
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50 views

Select characters using regular expression in QGIS

I'm trying to seperate characters from database to seperate fields. Database is like: 999-10-1-1 999-10-11-111 999-10-111-1111 999-10-22-1 999-10-1111-2221 and I want something like in seperate ...
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1answer
35 views

QGIS - Execute SQL Failure

I've written an SQL query which works in the query section of the QGIS DB Manager. SELECT Max(S_order), SegmentID, S_Order, Length, Buff_Segme, Buff_Order, Buff_Lengt, Buff_Uniqu FROM "...
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1answer
86 views

Practices with database in QGIS [closed]

I would like to store some specifics data (customer information, etc.) into my QGIS project. The aim is to be able to automaticly use these data later when I make some exports. Some of these data are ...
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1answer
537 views

Connect ArcGIS 10.6 to Oracle 12c Enterprise Edition

I want to connect ArcGIS 10.6 to an Oracle 12c Enterprise Edition. However, I found different informations on the Esri websites on how to do so. I followed this website (http://desktop.arcgis.com/...
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38 views

postgisQueryBuilder in QGIS can't connect to PostgreSQL DB - QPSQL driver not loaded

PostgreSQL is installed properly and I can work with my DB very well. My databases show up as connected inside the QGIS browser window. I think the appropriate packages are installed: # rpm -qa post* ...
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1answer
32 views

ArcGIS attribute tables exploitation

I have kind of the same question as "greyline" : How to implement 3NF (third normal form) in ArcGIS attribute tables? I need, among other things, to place foreign key in my tables to combine them and ...
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1answer
36 views

Windows QGIS PostGIS connection to Ubuntu PostgreSQL database

I have QGIS software in my Windows system and I want to make PostGIS connection to a database present in Ubuntu system, both are in same network(LAN). How can I do that?
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36 views

osm2pgsql: does table planet_osm_roads contain any non-duplicate data?

Although there is a osm wiki page that attempts to shed light on the different tables which are created within a postgres/postgis database there is something that is not quite made clear: Is the data ...
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21 views

n:m relations of lines including directions

For trail planning and route signalization projects, I am looking for a solutions which allows me to connect "physical" trail segments (available as .gdb from authorities) with overlaying routes, ...
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2answers
890 views

Using QField with Multi-User Access also Offline?

I got 10-20 QGIS-Users which edit all one Project online and offline. Sometimes they do it at the same time. Until now we only used QGisDesktop with a PostGis Database stored in QGIS Cloud(50MB ...
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1answer
35 views

Making one to many to many Attribute Relationships

I am making relationship between three tables in QGIS 3.8 version ("ACTIVE SITE","FUEL_TANK","REFUEL"). The primary key and the foreign key for the Tables are as follow the primary keys are "ACTIVE ...
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1answer
115 views

Understanding NOAA/GFS0P25 dataset of Google Earth Engine

I'm trying to get time-series data from NOAA/GFS0P25 data set on GEE. My code: var m2 = "NOAA/GFS0P25" var band1 = 'total_precipitation_surface' var data_collection = ee.ImageCollection(m2); var ...
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3answers
211 views

Finding the “square” bounding boxes of a country

I want to find the square bounding boxes that cover a country, of different sizes. First off, I know that they won't really be square, but just going by the numbers they can be said to be. The main ...
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1answer
118 views

Create different Server Database Connection file for ArcGIS Server

I would like to register database with ArcGIS Server. I know it is done through ArcGIS Server Manager under Site / Data Stores / Register: Database. I am also aware there can be different connection ...
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67 views

Connecting QGIS 3.4 to a MS Access database

I try to connect to MS Access and i have already created an ODBC connection. Now, I have the the problem that I cannot open the database in QGIS (but the connection was succesful).
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8answers
11k views

Comprehensive database of all cities/towns in South Africa?

The title says it all really - I'm looking for a comprehensive list/database of all cities/towns in South Africa. I know about these guys: http://www.afrigis.co.za/, but they're just not getting back ...
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54 views

Import multiple PostGIS layers in QGIS map canvas via QTask QGIS 3

The vertex tool in red and the geometry displayed by the layer in yellow are not in sync from time import sleep from qgis.PyQt.QtSql import QSqlQuery, QSqlDatabase serverName = 'hostname' database = '...
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15 views

Load .osm changefile to my local database

I've successfully created a local tileserver on Ubuntu 18.04, now I need to edit the map I've uploaded on database. I created my own .osc change file from openstreetmap editor's iD and I need to put ...
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89 views

PostGIS: proper way to model object that follows sections of another object's path?

First, apologies if this has been asked before. I don't really know how/what to search for, and am struggling to just put this question into words. I'm trying to model aerial utilities in a PostGIS ...
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30 views

Storing earth observation derived attributes for polygons [closed]

I want to generate a number of vegetation related indices (NDVI, NDTI, etc., min/max/avg/std (pixel values)) from earth observation data for a large number of polygons during the entire growing season,...
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1answer
114 views

How to make query of MySQL connection in QGIS?

i have added a connection with a MySQL database in QGIS (Add vector layer - Database - MySQL). Is there an option to make a query over the database in QGIS?
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44 views

QGIS 3.6 - Updating layers from changing excel spreadsheet

I am building/editing a table and utilising Excel as the vehicle. When I change the spreadsheet I need to produce a new csv file and then re-import to generate new layers. Handling Excel spreadsheet ...
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2answers
76 views

Delete several tables in QGIS DB manager

I have a lot of tables in a PostGIS-Database and I want to delete most of them. In the QGIS DB manager, I am able to delete one by one (right-click - delete). However, that's quite annoying. How to ...
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0answers
50 views

Creating QGIS Symbology Database?

I'm looking to swap from MapInfo to QGIS at my work and im trying to see if its possbile to have a centralised symbology database. eg to be able to pull our symbology from a database rather than from ...
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1answer
42 views

Why the replace function in PostgreSQL is not returning the value?

I am trying to convert state names to abbreviations and I am using the replace function. I am able to run the snippet successfully but names remain the same without being converted to abbreviation: ...
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2answers
65 views

write z-value from polygon layer to point layer in QGIS

I have two layers: 1 polygon layer where the depth of an area is written in the database (as DRVAL1) and and where the depth is exported as a Z-value to the geometry. 1 point layer that I use to plan ...
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59 views

Synchronisation problems using QFieldSync

When resynchronizing data from QField GPKG project to QGis SHP project, using QFieldSync, attribute data are shifted to the right column. There is a lag, I have never seen something like that before. ...
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1answer
92 views

Which provider should I use with `qgis.core.QgsVectorLayer` method at `PostgreSQL database with PostGIS extension` storage?

I use PyQGIS 3.6.1 Noosa to load layer from my database storage PostgreSQL database with PostGIS extension using qgis.core.QgsVectorLayer method. But layer is invalid somehow. Performing same ...
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1answer
101 views

Default expression won't write to database

Made this expression and put it in the defaults value box.: CASE ---cardinal WHEN ("CATCAM" = '1')THEN'2,6' WHEN ("CATCAM" = '2')THEN'2,6,2' WHEN ("CATCAM" = '3')THEN'6,2' WHEN ("CATCAM" = '4')THEN'...
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1answer
60 views

Database access pattern using PostgreSQL and ArcGIS

I am planning to connect to a PostgreSQL DBs on a server from ArcGIS on my laptop. My server admin is interested to know "The access pattern: How, when, how often, (would ArcGIS access the DBs) during ...
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1answer
302 views

ogr2ogr conversion failed when converting the varchar value to data type int

I keep getting this Error 1 when I run the following on some tables ogr2ogr -skipfailures -f "MapInfo File" -lco overwrite=yes -lco launder=no -lco relaxedFieldNameMatch "D:\QG\CREFNO.tab" "MSSQL:...
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206 views

ArcGIS Pro connection to PostgreSQL Database

I am connecting a PostgreSQL database to ArcGIS Pro and it connects but when I attempt to open the attribute table I receive a "Shape Integrity Error" and cannot view it. I am able to view the ...
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1answer
249 views

PostGIS view on multiple geometry columns

I have two PostGIS tables, ‘filelinks’ and ‘maricopa_plss_qtrqtrs’. The filelinks table has a geometry type column named ‘geom_p’ and the maricopa_plss_qtrqtrs has a geometry type column named ‘geom’. ...
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0answers
355 views

GDAL PostgreSQL shapefile import “Unable to find driver 'PostgreSQL”

I have seen a number of posts similar to this but with no resolution. I am experimenting with GDAL commands and am fairly new to it however when using a PostgreSQL database connection I am getting ...
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0answers
35 views

QGIS how to make options in valuemap invisible when outside constraint

I am making a geopackage to plan aids to navigation in a maritime environment. I have made the design of my attributes form with the drag/drop designer. The constraints I put in work i.e. If i choose ...
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0answers
40 views

Complex edge conditions on geo-edges

Spatial graph databases are capable to find a shortest path from the node A to the node B. Are there any DB which allows complex conditions on nodes and edges between them? For example: The node is ...
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1answer
231 views

Unable to change default geodatabase with arcpy.env.workspace

Even after I set the path for the default database with arcpy environment variable, ArcMap does not change the default database directory? At first my arcpy.env.workspace looks like below: >>&...

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