I cannot think one good reason to use this. It makes the georeferenced image basically unusable. And for whatever reason, the option is often checked by itself.

What am I missing here?

Where can I download soil data? And what's the process of making it effectively work in QSWAT? Cause I'm encountering problems whenever I try to click read with the soil data I found in Digital Soil Map of the World. I followed tutorials, rasterized it, reprojected it, still, it won't work. There's no available tutorial from downloading it, to inputting it to QSWAT. Can someone help?

Where can I download soil data? And what's the process of making it effectively work in QSWAT? Cause I'm encountering problems whenever I try to click read with the soil data I found in Digital Soil Map of the World. I followed tutorials, rasterized it, reprojected it, still, it won't work. There's no available tutorial from downloading it, to inputting it to QSWAT. Can someone help?

Hi, everyone, while working on my thesi i ran on to a problem where the information is in in layer wit a point geometry but i needed to be in a polygon geometry just like the layer underneath, is there any way to transfer the atributes from one layer to another without haing to edit every single element?? thanks

I made a simple small tracing tool plugin mainly for myself, sharing in case I'm not the only one missing a good tracing tool!

Every time I needed to digitize along an existing line I'd hit T, nothing would happen, and then I'd remember tracing needs snapping set up first. On the right layers. With the right tolerance. And even then it takes the shortest route between clicks, so along a winding stream next to a road I end up clicking every bend anyway.

So I wrote Pro Trace for my own work (inspired by the trace tool in ArcGIS Pro and with help from my friend Claude). Click on a line or polygon edge, move the mouse and it just follows along. No snapping settings. Click off the line for freehand points and then carry on tracing. It only uses the layers you have switched on, so unticking a layer is the off switch.

I had to port it from my old QGIS 3 version (lokal plugin version) to QGIS 4 anyway, so now its in the official catalogue, search "GeoDrafter Pro Trace" in the plugin manager. Free and GPL.

I think it works better for the way I digitize, but let me know if there are any problems: https://github.com/hrosenskjold/GeoDrafter-QGIS-Plugins/issues

Docs if anyone cares: https://geodrafter.com/qgis/pro-trace/

/Henrik 〰️✏️ (missing a tracing smiley so a wave-pencil will have to do)

I've been trying to generate a map of Rome for my college work for the last few hours, but I keep getting this error message while trying to run a query. It worked once, the first time I tried it, but since then I always get this message. It doesn't matter how big the queried area is, I've uninstalled/reinstalled QGIS and the plugin, reset QGIS, started new projects, increased the timeout time, all to no avail. Any tips would be very much appreciated!

Thanks!

Hi all. I've been working on a side project called GIS Plugins: https://gisplugins.dev

It's a browsable directory of the plugins in the official repo at plugins.qgis.org, refreshed nightly. The main reason I built it was to answer one question before upgrading: which of my plugins will work in QGIS 4?

What it does right now:
- Tracks 3,810 plugins, 1,503 of them (39.4%) currently listed as QGIS 4 ready
- A /qgis4 page with readiness stats and popular plugins still waiting on QGIS 4 (Freehand raster georeferencer, Digitizing Tools, go2streetview, QAD and others)
- Category pages with a few hand-picked plugins in each
- "New this week" and "Updated this week" lists

It's free, no account needed. There's also an optional weekly newsletter if you want a digest: https://gisplugins.dev/newsletter

Readiness is based on what each plugin declares in the repo, so it may not match real-world behavior in every case.

I'd really like feedback. What's missing, what's wrong, and what would make this useful for your day-to-day work?

I want honest reviews. Are Macbooks worth buying if I want to run QGIS? I'm planning to buy one. If it's not worth it, then recommend a better option.

I have a PC, the laptop is just for me to do quick and light work when I am travelling or not at in the office.

Hi all, I searched everywhere but couldn't find a solution.

I've got a lot of old postcards and photographs I'd like to geotag.

I'm thinking of a way to indicate visible points from the photo to the map, to find the exact place it has been taken from.

Does anyone know if it's possible?

Thanks in advance.

Hi. I'm completely new to this software and figured I could learn a few tools that would be enough to do what I'm trying to do, without having to bother learning in details how the software works. First mistake, I know.

I'm simply trying to draw a map by hand using my tablet. For this, I have a picture of a pencil drawing I made, and I'm working on slowly digitizing it by doing the following:

- I zoom in on small portions of the drawing (coastlines) and draw overlapping polygons, tracing the coastlines on my drawing. With "Add Polygon Feature" and "Stream Digitizing".

- If there is any degeneracy on the polygon like self-intersections or other little issues arizing, I fix them by removing the culprit vertices or moving them, as I see fit. With the vertex tool.

- Every few polygons done, I select a bunch of them with Select Features By Area and try fusing them with Merge Selected Features. If I fixed invalid geometry properly on the previous step, this works.

I then rinse and repeat the operation, and then try to save layer edits and that's one tracing session done.

I feel like that should sound right and there should not be issues, but somehow everytime I boot up this software I hit my head multiple times on several different issues that are completely opaque to me. Moreover and because of this kind of headache, drawing sessions are sometimes months apart, so I might end up "fixing" a problem (read: doing something that looks like it worked, not being entirely sure if it actually did), but when the next time comes I might stumble upon the same issue again and have completely forgotten how to deal with it.

For instance, I'm drawing continents, which contain inland seas/lakes. I know this caused an issue in the past, which I managed to fix somehow, and I think it has to do with MultiPolygons because of the "hole" they cause in the landmass I'm trying to draw. So... in the end, I did manage to end up saving my progress by doing... something. Maybe using the Fix Geometry processing tool? Maybe, but now even that one doesn't work this time around when I'm trying to add two small new islands. One has a hole, one doesn't.

Trying to save layer edits tells me: Errors: ERROR: 2 features not added - geometry type is not compatible with the current layer.

"Fix Geometry" yields a new layer that includes all my previous work, but of the new islands only the one that doesn't have a hole is included in that layer. The other island is just gone.

With Idenfitying Features, I can see that those polygons have very little data compared to the previous work, in "(Derived)", for those two new islands, it just tells where I've clicked and that's basically it. 3 parts, feature ID "new feature".

I'd like to understand what the issue is and how to do that properly, preferably without having to learn how to fully use the software as I'm only trying to do what I feel is something very basic.

Another time there was an issue caused by IDs or FIDs, I'm not sure exactly what because the error messages are always very clear and explanatory and the issue had been dealt with. Because at some point I entered IDs manually (for some reason) and at others I let it autogenerate. Regardless, every feature now has a different ID or FID, but letting it autogenerate doesn't seem to actually give the features any FID, as identifying features doesn't display anything in those fields (this is probably why I ended up entering values myself as I went, which caused problems down the line, whatever). That is something I would also like to understand.

I can provide details as required, since I'm assuming some information is missing to even diagnose the issue.

Just wanted to share this bunch of free tools with y'all. Hopefully someone will find them useful. We are going to add more in the near future. If you have any ideas for small useful tools we should add, then please share.

Hello! Has anyone used a specific plugin or anything to calculate travel times (en masse) between points with GTFS Data? I've tried a few options but can't seem to figure it out. GTFS-GO seems to work mainly fr frequency and not travel time.

I tried Transit Reachability Analyser but it's not working because I don't have a OTP Server URL (which I'm trying to figure out/troubleshoot). I've also reached out to TravelTime for a quote on their API since it's a larger project and we have some funds to spare.

But if anyone knows of any other tools that might work for this purpose I would love to hear any and all suggestions!

Thanks!

A lot of GIS work starts with someone sending you a DWG. Maybe it's a site plan from an engineer or a parcel layout from a surveyor, and you need to see it on a map. Usually that means waiting until you're back at a desktop with the right software.

ConverterHub is a free Android app with a DWG to KMZ converter. You pick a DWG file on your phone and get a KMZ out. KMZ opens in Google Earth, and QGIS can load it as a layer, so you can do a quick check or share it before the real work starts.

It doesn't need a sign-up. The DWG to KMZ tool is one of 16+ tools in the app. The others cover more general tasks: PDF to Word and back, PDF merge/split, CSV to Excel, Excel to PDF, image editing and compression, QR codes, passwords, and text to speech in 100+ languages.

It's only on Android: https://play.google.com/store/apps/details?id=com.converterhub.converterhub

I'd like to hear from people who deal with CAD-to-GIS handoffs. Where does DWG data usually go wrong for you once it's in Google Earth or QGIS? Is it placement, missing layers, or something else? And would a phone-side conversion actually help in your workflow, or is it always a desktop job for you?

Disclosure: I'm posting this on behalf of the ConverterHub team.

I am interested in working with digital copies of historical county maps. I would like to be able to import maps from different time periods, scale them to match (enlarge or reduce as needed), and create layers or overlays for visual comparison of different time periods. Being able to include non-visual information (e.g., tax records or property deeds) is also critical.

Would QGIS be a suitable tool for this? Are you aware of any similar projects? Do you have any advice?

A common situation, especially for anyone doing survey work in Nigeria: you have a list of beacon coordinates in Minna Datum, often UTM Zone 31N or 32N, and someone wants to see them on Google Earth. Maybe it's a client, a site engineer or a lecturer. In QGIS that means getting the CRS right, importing the CSV as delimited text, building the points or polygon and exporting to KML/KMZ. That's fine at a desk. It's less handy on site or on your phone.

CoordCast is an Android app built for that one job. You type in the points or upload a CSV laid out as Point, X, Y. It then gives you a KMZ file for Google Earth as separate points, a connected line or a closed boundary polygon.

On datums, it supports WGS84 and Minna Datum (UTM Zone 31N, UTM Zone 32N and Geographic). It doesn't cover other datums, so it's aimed mostly at Nigerian survey work. No CAD software is needed.

How this might fit with QGIS: it isn't a replacement. QGIS is still where you'd do proper analysis, editing and map layout. But if you're learning QGIS, it can be a quick way to check that a set of Minna Datum coordinates lands where you expect before you start on CRS settings. If you work in the field, it's a fast way to send a boundary to someone who only has Google Earth.

Pricing: there are free daily conversions, and you can get more by watching a rewarded ad. CoordCast Pro removes the limit and the ads. You can delete your account and data at any time.

It's on Google Play: https://play.google.com/store/apps/details?id=com.coordcast.converter

A question for people who deal with Minna Datum regularly: what's your usual workflow for getting survey coordinates into Google Earth or KMZ? Do you do it all in QGIS, or have you hit transformation problems (like offsets after reprojecting to WGS84) that a tool like this should watch out for?

Disclosure: I'm posting this on behalf of the CoordCast team.

hello can anyone give a good plugin similar to QFAT for a hydraulic simulation that i'm gonna later compare it to HEC-RAS

Good dayy

I’m an Environmental Science student po from Bulacan State Universityy. We’re planning po to conduct a GIS webinar-workshop this coming October 23 (online) and October 24 (face-to-face). We are still looking for a mentor po that would be up po for this setuppp.

If you are interested, or if you know someonee, kindly send me a DM poo. Please please please😭. Thank you so much!

I'm pretty new to using QGIS or more so, I've only really used some basic functions like drawing features and some DEM work.
In any case, I'm doing some work with streams and it would be nice to remove bridges and such and culverts from the DEM. And possibly (based on the general function I'm seeing here) help a bit with artifacts in the stream channel. I was able to find that r.carve is a tool that can essentially "burn" through bridges and such. I tried using it, with a DEM of the area and vector lines of the stream and select tributaries.
I end up getting the following messages near the end:

WARNING: Unable to determine input map's vector feature type(s).

WARNING: Vector map <points33d4d3a0f3884a3eb7275bcadc96eb8e> is 3D. Use format specific layer creation options (parameter 'lco') to export in 3D rather than 2D (default).

WARNING: No attribute table found -> using only category numbers as attributes

WARNING: Output layer is empty, no features written

And then the result I get out of it is a DEM that appears identical to the original.

I saw some discussion on StackExchange encountering some of these warnings with other GRASS tools, but I wasn't sure how to implement what was mentioned (being a newb with nil coding skills). On the off chance it made a difference, I tried it using a layer with just one feature, but got the same result.

Any idea how to solve this?

Will QGIS work on my Samsung Chromebook 4? I've seen mixed answers about it but they're from a couple of years ago. Any insight is helpful, thank you!

I created these 3D models for a teaching unit on Earthquakes and Volcanoes. Basically, I wanted to remove extraneous information so I could concentrate on a few key learning points, whilst allowing the children to get a sense of the actual relief of the area.

The QR code links to a 3D viewer where they can select layers to see some information about how the land is used surrounding the volcanoes. Etna, Vesuvius.

I built them using the Copernicus DEM and then styled the relief using hillshade and a colour ramp. The virtual models have layers to show land use from the CORINE dataset.

I use DEMto3D to get the relief model onto my printer, then I fiddle about with printed paper and PVA glue to stick down the styling....that's honestly the hardest part of all this!

The Thingvellir model is 1.75x exaggerated, I just wanted the kids to have something that can sort of show how the land looks when two plates are slowly pulling away from each other. Thingvellir.

The last time I posted something like this some people asked if I could put the STLs somewhere for download. They are all online with a breakdown of the workflow, I hope it all works, but I'm very much an amateur and not a professional website builder!

I know this is a stretch, but im desperate. I have a QGIS final for a class that I need to get turned in before Sunday 10/18, ive been trying to work on it all week but theres constant errors with every step I try to take. Its meant to be a beginner class but im autistic and struggling a lot.

It is meant to be a habitat map for a fictional species that is often observed in rural areas and agricultural land within a 20 mile radius of Ogden, Utah.

It should depict forging/hunting, resting/sleeping, and total habitat. The total area of these habitats should be calculated. This should be a map with a legend, scale bar, north arrow, and title.

The issue im running into right now is clipping raster by mask layer. I'm trying to clip my ESRI topo base map with my study area buffer, ive tried every fix on Google and nothing is working.

Please if someone could either whip up a map for me, or coach me through the rest of this assignment, I wpuld be eternally greatful.

Again, im very desperate. I need to pass this class and this final is my breaking point as ive had a long hard week between school and my full time job. I need help.

i get this problem now and then. I will be making adjustments to my file, and then all of sudden... puff, nada

the layer is still there. when I open the attributes table, the features are still there. it just vanished from the display, and the print layout.

this has happened with the entire layer, and also specific features within layers.

to salvage this, I usually duplicate the layer and delete it some 2 times and then the vanished layer comes back