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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27 views

Working with large datasets with no server [closed]

I am in a bit of a weird work environment. I'm a data-scientist type person who is now doing more and more GIS work on some very large datasets - spatial regression, some mapping, spatial correlation, ...
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20 views

How to fix an error while registering PostgreSQL database to ArcGIS Enterprise Server

Software in use is: ArcMap 10.8.1 ArcGIS Server (Enterprise) 10.8 PostgreSQL 13 + PostGIS 3.1 Windows 10 64bit I followed a guide to register a PostgreSQL database (PostGIS) to ArcGIS Server. When I ...
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30 views

Update a layer from QGIS DB manager

I have a layer that I want to upgrade using SQL sentences with QGIS DB manager. I want to do a simple join with another table, both are in a geopackage. My question is: Can I update the point layer ...
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33 views

PostgreSQL cannot work when opens SSL on Windows 10 [closed]

I am not sure this topic will fit here but I don't know ask it where. I am trying to open the SSL of PostgreSQL 10.16 on Windows10. I read a lot of documents about creating an SSL certificate to ...
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3answers
99 views

QGIS 3 SQL dialect - is UNION ALL allowed?

I have a very large SQL query consisting of two similar but different blocks, connected by a UNION ALL: select OBJECTID, PROJECT_NAME, BIOGEOCLIMATIC_LBL, SITE_SERIES_MAP_CDE_LBL_CPNT_1, GEOMETRY as ...
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1answer
55 views

Reasons to NOT make my database into a PostGIS database? [closed]

So our team currently has two databases in two "independent" parts of the process. It's organizationally independent but for the actual work we do they depend on one another's output. I ...
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1answer
30 views

Handling a database with more coordinate points than I need to be returned

I have a database with millions of coordinate points and I need to select a subset of them to create a heat map based on a bounding box. There are so many points that it's hurting performance on my ...
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1answer
28 views

PostgreSQL export geometry to .sql file [closed]

I don't know how to export the geometry of tables in a .sql format from PostgreSQL database. How can I do this?
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38 views

QGIS: Using OSgeo4W shell to login to and create a new PostGIS database

I'm trying to create a new database through the OSgeo4W shell, as opposed to loading QGIS and hitting the 'Manage DB' menu to make one an pipe in SQL scripts. I haven't seen any documentation on this ...
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1answer
64 views

QGIS access Oracle non-spatial database tables

I stumbled accross this when I tried to connect to a "normal" Oracle 11g instance (no Oracle Spatial) in order to join Oracle tables to spatial data in other formats. Note that this is not ...
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Saving Metadata to DB (QGIS 3.4 or higher)

Is it possible to save metadata of a QGIS 3 layer in a database (PostGIS), similar to the function in QGIS 2.18 "save layer style to database". I don't want to save it in the project or as a ...
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1answer
56 views

ArcGIS Enterprise Registered Database Changed - Update Source Without Republishing All Layers?

I have around 50 feature and map layers published in ArcGIS Enterprise (the same would apply for ArcGIS Online) that reference registered PostGIS database. The database will be migrated (same names, ...
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1answer
57 views

Add tables from access database to QGIS

There are some similar question here, but nothing worked for me. So I have a database that has the ending .mdb which to my knowledge is some kind of Microsoft access database. But I also tried it with ...
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0answers
76 views

Connecting to Azure PostgreSQL using domain user account through QGIS

We are using QGIS over the top of an Azure PostgreSQL database. We have it working using SQL user / password combination but security policy dictates this should be a domain user authenticated ...
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0answers
42 views

Extending OSM database with new data

I want to add a new table inside my OSM database with extra data for every restaurant, and then when retrieving the places join the table by the "osm_id", is this possible and if yes, any ...
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46 views

Load vector layer directly from mongodb with PyQGIS

I want to load my vector layer directly from a MongoDB database using Python in QGIS. I found code here but it dumps the layer before loading it. Here is the code I found: client = MongoClient() ...
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2answers
70 views

What is the proper convention for storing rasters in PostgreSQL database?

Just starting to implement PostgreSQL at work and want to make sure I'm building something that will be efficient down the road. Let's say I have a raster of surface temperature for every hour of ...
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1answer
164 views

Can I store raster data in a spatialite database (in QGIS)?

This might be a super simple question, but I'm a little confused. I don't know what the best way is to share qgis-projects that have raster-data, vector-data and some applied styling. I figured a ...
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150 views

Mongo geoWithin problems reading from collection

I have a data set with geo points. { _id ...other fields... location: { type: "Point", coordinates: [0,0]}} What I have been attempting to do is filter out and delete any documents that ...
2
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1answer
77 views

Access SpatiaLite connections with PyQGIS QgsProviderMetadata (QGIS 3.10.7 LTR)

I would like to list spatialite connections and access a specific connectionwith PyQGIS. For postgres provider it's pretty straightforward: >>> QgsProviderRegistry.instance().providerMetadata(...
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0answers
105 views

How to save each band in a new row with it's name, in PostGIS?

I have used PostGIS's raster2pgsql to import my multi-band raster data into my PostGIS database. Here is the code that can do this operation: raster2pgsql -I -C -e -Y -F /home/jj_user/input.tif ...
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0answers
17 views

Existing standard country codes explicit in time and space

There are several comprehensive systems for coding countries such as ISO, TLD, M49. I am looking for a system that is explicit about the time period that the code refers to. My application is a ...
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1answer
78 views

QGIS MySQL points import

I have a column in my MySQL database table that contains location information (GeoJSON). I want to import this data and see the points on my QGIS project map but it doesn't seem to work. What I was ...
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0answers
62 views

Do I need a database for generating WFS-T with QGIS-Server?

I have hard difficulties in understanding: I have a QGIS-Project (in QGIS) and I want to create a WFS-T by using QGIS-Server (and the QGIS-Server I have is connected with e.g. Windows-Server). Is the ...
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41 views

Request Error QGIS Server 3.12.3

When I request http://10.48.242.187/cgi-bin/qgis_mapserv.fcgi?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetCapabilities&MAP=/var/www/html/S5/qgis/Erhaltungsprogramm.qgz I get always an error ...
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2answers
114 views

PostgreSQL database designer that supports PostGIS geometry data types

Does anyone know if there are PostgreSQL database modeling software or apps that support PostGIS geometry data types? I know pgModeler is supposed to but I have been unable to get this installed.
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1answer
1k views

psql changing comma to decimal for importing CSV file

I try to import a CSV file into a PostgreSQL database that runs on a remote server. I use psql via SSH. AIS_DB=# CREATE TABLE bet_srk_2008 ( AIS_DB(# Unique_VesselTraject numeric, AIS_DB(# ...
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38 views

Connect a Python script to a database

I need to run a script tool from ArcCatalog. It needs to access a feature class in an ArcSDE database so I can link the script to the layer as a source layer. I have connected the folder the script's ...
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289 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
110 views

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

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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0answers
124 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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0answers
37 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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22 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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2answers
81 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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1answer
672 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
97 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
99 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
123 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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0answers
141 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
63 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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90 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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0answers
24 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, ...
1
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1answer
48 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
451 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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1answer
454 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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0answers
319 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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62 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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0answers
101 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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0answers
46 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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0answers
84 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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