Re: [Qgis-user] Loading geopackage layers in a model

Hi, I agree with going the python road. I would normally go with a geopandas as I am not tto good with the QGIS API. I am basically trying to figure out if I am missing an obvious existing tool. I looked at the multiple input. It could work with multiple layers that are already opened

[Qgis-user] Join Attributes by Location

Hi krishna Ayyala, what QGIS version are you using? What you mean with "Exported the joined layer"? Does the temporary layer "Joined layer" contain any features? With the options visible in the screenshot, the "Join attributes by location" algorithn should create a temporary layer with 100

[Qgis-user] Couldn't load SIP module - Windows 10

Hi, After a fresh install of OSGeo4W network installer, I start QGISD Desktop.  A python error box pops up with the error copied below. I close the error window and the program loads. However, if I click on plugins settings, I receive the error: No

Re: [Qgis-user] Loading geopackage layers in a model

I think this would be rather challenging to achieve with the graphical modeler with the current toolset and would be much more readily developed in a pyqgis script. Whilst it may be possible (although I'm not entirely sure how), the model builder tools support for iterators and conditionals can

[Qgis-user] Loading geopackage layers in a model

Hi, I must be missing the obvious but how can I load a particular layer (or all layers) from a Geopackage using the graphical modeler? The idea I want to implement is :1) load geopackage from file -> 2)filter all layers by geometry type -> 3)save point, line and polygon layers.  I can't find

Re: [Qgis-user] Geo Raster Background

I use PDF as well, there you can not save a background-color or something like that. This should be better an option in QGIS to "set the colors of the black recangles" ;-) thanks all. Am 01.10.2021 um 23:19 schrieb Nicolas Cadieux: Hi, It's quite simple, you just need to set the nodata

Re: [Qgis-user] Geo Raster Background

Hi, I usually do a brief adjustment on pixel values prior to georeferencing, to make sure that no pixel has the value I need to assign to nodata. Depending on the source dataset, I usually try to replace the zeros with ones, and reserve the zero for nodata. El vie, 1 de oct. de 2021 a la(s)

Re: [Qgis-user] Geo Raster Background

Hi, It's quite simple, you just need to set the nodata value (what you call the background-color) in the original file and then save it.  The complication is that this requires that the datatype for the file accepts the no data value. This part is harder to figure out for your not used to

Re: [Qgis-user] Join Attributes by Location

In that case I think it'll be difficult to troubleshoot without data that replicates the issue (even if it's fake data). Have you tried the different cardinality settings available (the "Join Type") to see if something in the data structure, values, or tool configuration is causing the mismatch

Re: [Qgis-user] Geo Raster Background

sounds like rocketscience ... for a simple task to set the background-color ... may be I am searching the web where I have to place my feature request for this ... Am 01.10.2021 um 21:39 schrieb Nicolas Cadieux: Hi, Start by setting the nodata value in the input raster.

Re: [Qgis-user] Join Attributes by Location

Yah. It should create temporary layer with 100 points.. The temporary layer "Joined layer" also does not have any features in it. Unfortunately I cannot share the data . Regards. On Fri, Oct 1, 2021 at 1:40 PM Andrea Giudiceandrea wrote: > Hi krishna Ayyala, > what QGIS version are you using?

Re: [Qgis-user] Geo Raster Background

Hi, Start by setting the nodata value in the input raster. (raster/conversion/translate/Assign a specific nodata value to output bands).  Make sure you select a data type that allows your nodata value.  For example, if you select Byte - Eight bit unsigned integer, and a no data value of

Re: [QGIS-it-user] ordine elenco plugin

Ciao Stefano, finalmente oggi il problema che impediva di ordinare correttamente nel Plugin Manager la lista dei plugin per data dell'ultimo aggiornamento (cioè la data di pubblicazione dell'ultima versione disponibile del plugin) è stato risolto. A presto. Andrea Andrea Giudiceandrea Mon,

Re: [Qgis-user] georeferencing and displaying lat long.

Hi Byron, Start by selecting the CRS for your project that matches your map. Project/Properties/CRS.  Then, go to Vector/Research tools/Create Grid. Voilà! Nicolas On 2021-10-01 1:30 p.m., Firstname Lastname wrote: i have several maps to georeference that have reference grid in lat/long. 

Re: [Qgis-user] georeferencing and displaying lat long.

If you are wanting to use the canvas with a graticule you can configure it from view>>decorations>>grid. That only supports using the map CRS units afaik. For producing vector grids in various coordinate systems and intervals, you can use the create grid tools from the processing toolbox. As an

Re: [Qgis-user] Geo Raster Background

Hi, nope this isn't what I want ... it is the same as setting transparent color manually. I am using PDF and TIF for georeferencing. Regards Without no-data-0 or transparent-color: Set transparent-color to 0,0,0 or use no-data-0: Am 01.10.2021 um 19:26 schrieb Charles Dixon-Paver: I just

[Qgis-user] Join Attributes by Location

Hello, I have Layer 1 -- 100 Points I have Layer 2--- 100 Polygons I have used the select by location tool as below 98 Points selected. [image: image.png] I have used "Join attributes location" tool on the same layers. Exported the joined layer. I see zero records in the Joined layer.

[Qgis-user] georeferencing and displaying lat long.

i have several maps to georeference that have reference grid in lat/long. can someone please tell me how to display the coordinate grid in lat long on the map so that i get some nice grid lines for reference. actually, knowing how to post the reference lines in any coordinate system would be

Re: [Qgis-user] Geo Raster Background

I just loaded an unreferenced png with black content into qgis, then set the nodata value to 9, then did a fake georeference with arbitrary coordinates, and the result seemed to be rotated without any background pixels. Using 3.20 on Windows. The geoereferencer has a checkbox for setting

[Qgis-user] Accessing Google gvfs mounted files from QGIS

Good day everyone, I have some data stored in Google Drive. In Ubuntu (21.04) I can view this data from the Nautilus file manager. If I open a terminal window in one of those folders and do an "ls" I see files with names like: 102DKMhG5dFOgocGZcExtph8QVZvH8ya9 104L05_H6_SMc-QpdWO4KWe3EN_40S-DS

Re: [Qgis-user] Geo Raster Background

When georeferencing, aren't the areas outside the original image, eg, the "triangles" resulting from rotation, treated as no data? Wouldn't this issue be resolved by setting the no data value to something other than black? Just guessing here, obviously.

Re: [Qgis-user] Geo Raster Background

yes, maybe to orange, a color that is not in the original image, so I can do this color transparent. Am 01.10.2021 um 18:25 schrieb David Strip: When georeferencing, aren't the areas outside the original image, eg, the "triangles" resulting from rotation, treated as no data? Wouldn't this

[Qgis-user] Introduction to QGIS course with Kartoza, 11-13 October 2021

Good day GIS community Learn how to make beautiful, functional maps and to use QGIS like a professional. Kartoza's next three-day Introduction to QGIS course will be on the 11-13 October 2021. Course Agenda: Day 1 - Introduction to

Re: [Qgis-user] ordinary kriging parameters

Hi Maria: Just from the cuff, the units are pixels or meters.  Try reprojecting your source data to a projected coordinate system (UTM, for example) and try kriging again.  Set the raster resolution to a course value that makes sense for your data to run a test raster and then run at the

[Qgis-user] query for automatic building parcel/footprint extraction from high resolution satellite image

Hi All, Would anyone please suggest to me the tool name or plug-in name to automatically extract building parcels/footprint from high resolution satellite image in QGIS. -- Warm regards Shrawan Kumar Tripathi Senior GIS Engineer PATAA Navigations Pvt. Ltd.

Re: [Qgis-user] Geo Raster Background

Hi, Perhaps you can add a file or a screen shot because what you want to do it not clear. An image would help. In your second email, you talk about triangles? Did you mean to write rectangles? Nicolas Cadieux https://gitlab.com/njacadieux > Le 1 oct. 2021 à 05:30, L.W. a écrit : > >  > I

Re: [Qgis-user] Geo Raster Background

Maybe this has to do with this longstanding issue: https://github.com/qgis/QGIS/issues/23760   Regards, Roland     Gesendet: Freitag, 01. Oktober 2021 um 11:30 Uhr Von: "L.W." An: "Charles Dixon-Paver" Cc: "qgis-user@lists.osgeo.org" Betreff: Re: [Qgis-user] Geo Raster Background I

Re: [QGIS-it-user] Assegnare geometria a tabella dati esistenti

Confermo, la cosa strana e che lo avevo provato e mi aveva funzionato però ora ripetendo mi da errore. Un'altra prova che potresti fare è lato PostGis popolare i punti di scarico come le vasche; update tuatabella set geom(scarico)=geom(imhof) (se non sbaglio erano entrambe puntuali). A

Re: [Qgis-user] Geo Raster Background

I think one of us is on the wrong track with what is to be achieved. I don't want to manipulate the image itself, just the background at the moment when the raster image (or raster pdf) is converted to a TIF and georeferenced. if the rectangle contains black text, as described, this would also

Re: [Qgis-user] Geo Raster Background

You can translate pixel values with the raster calculator (available under the raster menu). Black pixels will have a value of 0,0,0 on RGB bands and red pixels would have a value of 255,0,0 so it's just a matter of changing the values accordingly on those bands. The raster calculator will

Re: [Qgis-user] Geo Raster Background

Thanks for answering, but I think this is not the way I want to go ... Or, I do not have written detailed. I have a raster image e.g. a white rectangle, after setting the points, QGIS rotats this image, let's say, by 45 degrees. The corners of the imported image are now black triangles. I do

Re: [QGIS-it-user] R: Assegnare geometria a tabella dati esistenti

Ciao Francesco, hai sicuramente ragione sul fatto che dovendo considerare dati di tipo diverso le tabelle debbano essere due per la corretta gestione dei dati Comunque, parlando in generale e non del caso specifico, postgres ti consente di avere due o più campi geometrici nella stessa tabella Dal

Re: [Qgis-user] Configuring QGIS server on Ubuntu 20.4

On Fri, Oct 1, 2021 at 9:46 AM Mats Elfström wrote: > Hi Alessandro! > Please keep the conversation on the user list so that others can benefit from it or jump in and give some advice. > I'd be glad to help. Just to make sure, which of these three docs is valid? > You linked to the first, but

Re: [Qgis-user] Geo Raster Background

There's not really any way for a GIS system to automatically differentiate between black background pixels and black data pixels. QGIS supports users setting custom pixel values to render as transparent pixels, but it's left up to users to ensure that their data and background values are

Re: [QGIS-it-user] Assegnare geometria a tabella dati esistenti

Ciao, secondo me è da usare il comando di QGIS "Fondi Elementi Selezionati" e non "fondi attributi degli elementi selezionati", in questo modo. Disegni il punto dello scarico quindi nuova geometria, selezioni questo e la riga relativa alla vasca alla quale lo vuoi collegare. Digiti "Fondi

[Qgis-user] Geo Raster Background

Hi, how to change the backgroundcolor of a georeferenzed raster image? When a raster image is rotated by qgis after setting all points the backgroundcolor is black RGB(0,0,0). Set black to transparent is difficult when there is black text. regards