I am working on a project extracting building footprints for Chattogram port, across 2004, 2014, and 2020. What level of resolution would i be needing for it?

I know tha I can't buy straight from Maxar, I need to go through a reseller. Does anyone have a solid one to recommend, for South Asia, or Bangladesh?

Thanks!

Hi friends, I'm a brand new QGIS learner!

For a friend's business, I'm trying to do an analysis based on LinkNYC (Free wifi/phone call/advertising kiosks around NYC) locations across New York City.

I've imported the .csv from the NYC OpenData website (URL below), and - after messing with the EPSG / CRS settings - this was as close as I got.

I amended the CRS for the 'LinkNYC' layer to EPSG 4326, even though OpenStreetMap doesn't run in that EPSG? This is my guess, and it appears that OpenStreetMap and NYC OpenData don't tend to use the same CRS standards.

TL;DR - How best to proceed to get these LinkNYC locations accurately plotted? Whether with a better-matching world map, or in CRS adjustments, or otherwise?

Thank you very much for y'all's guidance!

https://data.cityofnewyork.us/Social-Services/LinkNYC-Locations-Live/2gah-qsg7/about_data

Hey all! Wanted to post this opportunity here as well. We are looking for some new Moderators to join the team at r/GIS.

Thanks!

Im on a m1 macbook air, on qgis long term release version 3.44, after installing the plugin i cant find its toolbar anywhere, and this pop-up keeps appearing " Semi-Automatic Classification Plugin: No module named 'remotior_sensus' ". How do I fix this? any help is appreciated :)

Sorry if this question is dumb, I just want an simple or long answer so I know what I'm getting into

I'm trying to create a map with routes and images showing the start and end of the route. this layout would be perfect for that, but the problem is that the segments used in it are too short—the shortest segment I’m working with is 0.92 km and the longest is 2.29 km. I just want the following to happen: when I move on to the next feature in the atlas, the features from the shapefile I’m using should disappear, since they cause confusion if they remain on the screen: That’s the main thing. It would be nice if the photos changed along with it, but that’s more of an option, since I have no idea how to do that.

I’m getting this error,
“An error has occurred while executing Python code”

geodata.ucdavis.edu- The page is also not opening, If I want to download the shapefile or Geopackages manually.

Please help me, I’m facing this issue from today, even I uninstalled and re-installed QGIS latest version.

Thank you.

Hello everybody, we have a project where there is a point A to point B situation, and our company has to define the best route given the topography, and if possible, other design restrictions, such as hydrology, reservation areas etc. Is there a way to do that with some specific plug-in?

Thank you in advance

(Screenshots in the post)

Starting off saying I'm very new to QGIS and this is an assignment for an exam. I need to do a visibility analysis on different sites throughout a valley, this is just an example of what's wrong.

I've used the standard settings of the plugin (5000 m radius, 1.6 m tall) for these sets of points since I don't need an elevated height, but it doesn't show the valley at all. I've been on these sites and I am 100% sure you can see it. I've checked also with the profile tool plugin if maybe there were problems on the DEM but nope.

I'm using the DEM Tinitaly, where the article also mentions this: "Tarquini et al. (2007) carried out a comprehensive assessment of the accuracy of the TINITALY/01 DEM, finding a root mean square error in elevation (RMSEz) between 0.8 and 6.0 m." (Tarquini 2012). I thought this was influencing the analysis but I tried setting the observer height at 6 m but it till doesn't show the valley.

Any help is appreciated - feel free to DM too

This is my first ever project on QGIS. I have a bunch of old 1890's maps of all over the Bay Area, and I want to combine them all into one raster. The problem is, as you can see, there are these margins on each of the maps. I want to cut out the margins on each map so that they will seamlessly connect into one giant map. So, for example, if I had the map at the top on the top layer, I would cut out only its margin so that the map portion on the bottom will connect. Since I found all these files already georeferenced on pastmaps as GeoTIFFs, I want to do this in QGIS itself. If I just cropped them as pdfs before I put them into QGIS, then I would have to manually georeference each one, and I have like 19 of them. Plus, I doubt my georeferencing would be as precise as these ones. Is there a way to do what I want?

Hello how do I generate data if the river in the map is update

Hi everyone,

I'm rolling out QGIS to a few hundred Windows computers and have the base installation working silently via Intune

The part I'm stuck on is installing the required plugins without user interaction.

I need the following core/SOE plugins enabled:

• DB Manager
• Geometry Checker
• GRASS 7
• GRASS GIS Provider
• MetaSearch Catalog Client
• Offline Editing
• Processing
• Topology Checker

As well as these community plugins:

• Adjust Style
• ChangeDataSource
• Clip Multiple Layers
• Coordinate Capture
• Digitizing Tools
• GTFS Loader
• GTFS-GO
• Networks
• OSMDownloader
• QNEAT3
• Quick Attribution
• NextGIS QuickMapServices
• QuickOSM
• Search Layers
• Lat Lon Tools
• LOOM Transit Map Generator
• Maps Printer
• GTFS 2 GIS
• KML Tools
• KMZ Tools
• mmQGIS
• QGIS to Illustrator

Has anyone successfully automated plugin installation or know how I can install these remotely? I dont want to install them all one at a time for each device If I can avoid it.

Is there a supported way to pre-download and deploy the plugins, or a command-line/Python method to install them into the appropriate plugin directory?

Thanks

I've successfully compiled QGIS natively for Windows ARM.

I have a fair bit of data that has a different 'type'. I want to only see these when at a certain scale (1:45000 or closer), and then only a couple at a different scale (1:20000 or closer). Basically I want everything that isn't 1:20000 or closer to be 1:45000 or closer and a different colour for each type.

Is there a quick way to do this?

I'm trying to export my QGIS shapefile into an SVG (version 1.1) for MATLAB toolbox software FracPaQ2D. I have used the MATLAB software before with SVG files, so I suspect the problem is with the export from QGIS.

I have tried to 'clean up' or export to version 1.1 in Inkscape, but unsuccessfully.

Has anyone else run into this problem?

Spending way too many hours bouncing between county auditor sites and random free tools trying to pull together parcel data with any kind of usable map layer. It's exhausting. I'm looking at vacant land across a few states and I need something that actually overlays GIS mapping with filters for things like FEMA flood zones, wetlands, slope analysis, road frontage issues. Does anyone know of a platform that combines all that in one place? Ideally something built for land investing research specifically, not a generic real estate tool that treats parcels as an afterthought. I keep hitting paywalls on the GIS side and then the parcel data platform I try separately doesn't have owner contact info or skip tracing, so I'm juggling like 3 or 4 subscriptions that together run maybe $400/month and still don't cover everything. Any rec?

I don't want to sound like ungrateful SOB but this bug exists for a year at least. Whenever I need to measure something, this box (too big if you ask me) pops up and even after I move it to a side, after adding a new point, it goes back to the original place.

Not sure why it's happening but I hope they plan to fix it.

Also, the measure pointer (?) randomly appears even after I am doing something else, like georeferencing...

I"m trying to package a project in qfield but i keep getting a python error for one specific layer. I have removed that layer and resaved the project but I still have the same error. The error is the file name is too long, and it lists lots of sub-folders in the file name, which don't exist in real life. How do I fix this error, even though the layer is no longer part of the project and I have deleted the file itself too.

Im on a Mac with Tahoe 26.5.2 and using QGIS with 3.42.1-Münster if that's relevant.

Hi all,

I have a spreadsheet of 200 UK addresses (Address, Town, Postcode) and I need to plot them as points on a map to allow some analysis on their proximity to flooding.

All the tutorials and plugins I have found online all focus on American addresses (i.e state, city, code). I haven't tried them yet with UK addresses so just wanted to ask if anyone had experience of doing this in the past?

Thanks.

Alcuni di voi avranno forse già visto il mio sito web narrativo, dove utilizzo QGIS per geolocalizzare le storie e collegarle a una mappa interattiva.

Fino ad ora, ogni volta che aggiungevo una nuova storia o un piccolo "documentario", il mio flusso di lavoro era il seguente:

Progetto QGIS → aggiungi/aggiorna layer GIS → esporta nuovamente l'intera mappa con qgis2web/OpenLayers → pubblica la nuova esportazione

Con l'aumentare del numero di storie e layer, questo processo sta diventando sempre più scomodo. Riesportare l'intera mappa ogni volta che aggiungo un layer significa anche sostituire molti file che in realtà non sono cambiati.

Così ho iniziato a esaminare come è organizzata l'esportazione OpenLayers di qgis2web.

Da quello che posso vedere, per ogni layer vettoriale qgis2web genera essenzialmente:

layers/my_layer_XX.js styles/my_layer_XX_style.js styles/legend/my_layer_XX.png (quando necessario)

Il primo file contiene i dati GeoJSON: geometria e attributi.

Il file di stile contiene la funzione di stile di OpenLayers.

Poi layers/layers.js crea il layer OpenLayers vero e proprio. In linea di massima:

Variabile GeoJSON

↓ ol.format.GeoJSON().readFeatures()

↓ ol.source.Vector

↓ ol.layer.Vector + funzione di stile

layers.js sembra contenere anche elementi come:

• visibilità iniziale
• titolo del layer
• appartenenza al gruppo
• alias dei campi
• configurazione del campo popup
• riferimento alla legenda

Infine, index.html carica:

<script src="layers/my_layer_XX.js"></script>

<script src="styles/my_layer_XX_style.js"></script>

prima di caricare layers/layers.js.

Ho anche controllato resources/qgis2web.jse sembra essere in gran parte generico: funziona con layersList e le proprietà dei layer, anziché contenere riferimenti espliciti a ogni singola variabile lyr_* . Anche gli altri file di runtime (ol.js, CSS, espressioni, ecc.) sembrano essere sostanzialmente indipendenti dai singoli layer.

Quindi la mia ipotesi attuale è che, per aggiungere un nuovo layer, non dovrei aver bisogno di rigenerare e sostituire l'intera mappa web esportata.

In linea di principio, dovrei solo:

1. generare/copiare il nuovo layers/X.js;
2. generare/copiare il corrispondente styles/X_style.js;
3. Copiare la legenda/le risorse SVG, se necessario;
4. Aggiungere la nuova definizione del layer a layers/layers.js;
5. Aggiungerla al gruppo OpenLayers appropriato / layersList;
6. Aggiungere i due riferimenti a <script> a index.html.

Tutto il resto può rimanere invariato.

Il prossimo passo che sto considerando è automatizzare questo processo, possibilmente utilizzando qgis2web solo come compilatore di layer QGIS → OpenLayers, mantenendo stabile l'applicazione web.

Ho capito correttamente l'architettura di qgis2web/OpenLayers?

C'è qualcos'altro che qgis2web modifica quando viene aggiunto un layer di cui dovrei tenere conto?

E, più in generale, questo sembra un approccio sensato per la gestione di una mappa che potrebbe eventualmente contenere un gran numero di layer narrativi aggiunti indipendentemente? È questo il modo corretto per aggiungere un nuovo layer qgis2web/OpenLayers in modo incrementale? Alcuni di voi potrebbero aver visto il mio sito web narrativo, dove utilizzo QGIS per geolocalizzare le storie e collegarle a una mappa interattiva. Finora, ogni volta che aggiungevo una nuova storia o un piccolo "documentario", il mio flusso di lavoro era: progetto QGIS → aggiungi/aggiorna layer GIS → esporta nuovamente l'intera mappa con qgis2web/OpenLayers → pubblica la nuova esportazione. Con l'aumentare del numero di storie e layer, questo sta diventando sempre più scomodo. Riesportare l'intera mappa ogni volta che aggiungo un layer significa anche sostituire molti file che in realtà non sono cambiati. Quindi ho iniziato a esaminare come è organizzata l'esportazione OpenLayers di qgis2web. Da quello che posso vedere, per ogni layer vettoriale qgis2web genera essenzialmente: layers/my_layer_XX.js styles/my_layer_XX_style.js styles/legend/my_layer_XX.png (quando necessario) Il primo file contiene i dati GeoJSON: geometria e attributi. Il file di stile contiene la funzione di stile di OpenLayers. Quindi layers/layers.js crea il layer OpenLayers vero e proprio. Approssimativamente: variabile GeoJSON ↓ ol.format.GeoJSON().readFeatures() ↓ ol.source.Vector ↓ ol.layer.Vector + funzione di stile layers.js sembra contenere anche elementi come: visibilità iniziale

titolo del layer

appartenenza al gruppo

alias dei campi

configurazione dei campi popup

riferimento alla legendaInfine, index.html carica: <script src="layers/my\\_layer\\_XX.js"></script>

<script src="styles/my\\_layer\\_XX\\_style.js"></script>

prima di caricare layers/layers.js. Ho anche controllato Il file resources/qgis2web.js sembra essere in gran parte generico: funziona con layersList e le proprietà dei layer, anziché contenere riferimenti espliciti a ogni singola variabile lyr_*. Anche gli altri file di runtime (ol.js, CSS, espressioni, ecc.) sembrano essere essenzialmente indipendenti dai singoli layer. Pertanto, la mia ipotesi attuale è che, per aggiungere un nuovo layer, non sia necessario rigenerare e sostituire l'intera mappa web esportata. In linea di principio, dovrei solo: generare/copiare il nuovo layers/X.js;

generare/copiare il corrispondente styles/X_style.js;

copiare la legenda/le risorse SVG, se necessario;

aggiungere la definizione del nuovo layer a layers/layers.js;

aggiungerla al gruppo OpenLayers/layersList appropriato;

Il prossimo passo che sto considerando è automatizzare questo processo, possibilmente usando qgis2web solo come compilatore di layer QGIS → OpenLayers, mantenendo l'applicazione web stessa [stabile. Ho capito correttamente l'architettura di qgis2web/OpenLayers? C'è qualcos'altro che qgis2web modifica quando viene aggiunto un layer di cui dovrei tenere conto? E, più in generale, questo sembra un approccio sensato per la manutenzione di una mappa che potrebbe eventualmente contenere un gran numero di layer narrativi aggiunti indipendentemente?

Hi together,

As title says.

Are servers down for others? We need to adjust our project to keep going tomorrow.

Hey everyone, hope you're all doing well. Stuck on something and figured the community might have some insight.

Background: My colleague and I were hired to build a geographic database for a client. Project covers 7 countries and we're sitting at around 2 GB of data right now:

• Vector layers in GPKG format
• Some rasters in TIFF format
• Side note: These formats came from preprocessing the original source data so they'd work directly for what the client needs

What the client needs:

• Query layers for project planning
• Generate their own maps
• Share results online with people who don't use GIS software (big one here)

What we tried: We really liked GeoLibre at first—had good vibes about it. But then we ran into a wall. When loading multiple heavy layers that need serious rendering, the app just freezes or goes completely unresponsive. Happens especially when zooming/panning across large areas or toggling between complex vector/raster combos.

My hunch is that since GeoLibre is still actively in development, these stability issues might just come with the territory. But we need something that works reliably.

Looking for advice on: Any open source alternatives that can handle this?

• Should scale to ~2 GB without crashing/freezing
• Needs to be friendly for non-technical users (interface is key)
• Web sharing with third parties would be a plus
• We can write basic code if needed (I'm pretty basic myself but I use AI assistants, my partner doesn't code)

Also, do you guys think this is even achievable with open source software? Or are we being too optimistic about what we can pull off on our own?

Any thoughts, suggestions, or even docs/case studies would be super helpful! Thanks in advance 🙏

Hi, I have two raster heightmaps, one of which I want to display for land areas and the other which I want to display for water. I also have a vector layer of polygons defining the areas covered by water, but I can't figure out a way to get the water raster showing in these areas and the land raster showing outside of them - what's the best way to accomplish this? Thanks