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QGIS Planet

Distanza Predefinita su Form

Distanza Predefinita su Form

Introduzione

Come calcolare la distanza tra due stazioni successive e far popolare l'attributo tramite il Valore predefinito in in Form usando un GeoPackage.

!!! Abstract "Funzione" Come usare il Valore predefinito per popolare un attributo legato alle geometrie.

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[Case Study] Using Mergin Maps as part of an end-to-end solution for farm management

Agrimotion, an agricultural consultancy in South Africa, specializes in perennial crops. Their IMPI platform, developed with Lutra Consulting and Mergin Maps, simplifies farm management by enhancing data collection and analysis, boosting productivity, and reducing costs.
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QField 3.2 “Congo”: Making your life easier

Focused on stability and usability improvements, most users will find something to celebrate in QField 3.2

Main highlights

This new release introduces project-defined tracking sessions, which are automatically activated when the project is loaded. Defined while setting up and tweaking a project on QGIS, these sessions permit the automated tracking of device positions without taking any action in QField beyond opening the project itself. This liberates field users from remembering to launch a session on app launch and lowers the knowledge required to collect such data. For more details, please read the relevant QField documentation section .

As good as the above-described functionality sounds, it really shines through in cloud projects when paired with two other new featurs.

First, cloud projects can now automatically push accumulated changes at regular intervals. The functionality can be manually toggled for any cloud project by going to the synchronization panel in QField and activating the relevant toggle (see middle screenshot above). It can also be turned on project load by enabling automatic push when setting up the project in QGIS via the project properties dialog. When activated through this project setting, the functionality will always be activated, and the need for field users to take any action will be removed.

Pushing changes regularly is great, but it could easily have gotten in the way of blocking popups. This is why QField 3.2 can now push changes and synchronize cloud projects in the background. We still kept a ‘successfully pushed changes’ toast message to let you know the magic has happened 🚀

With all of the above, cloud projects on QField can now deliver near real-time tracking of devices in the field, all configured on one desktop machine and deployed through QFieldCloud. Thanks to Groupements forestiers Québec for sponsoring these enhancements.

Other noteworthy feature additions in this release include:

  • A brand new undo/redo mechanism allows users to rollback feature addition, editing, and/or deletion at will. The redesigned QField main menu is accessible by long pressing on the top-left dashboard button.
  • Support for projects’ titles and copyright map decorations as overlays on top of the map canvas in QField allows projects to better convey attributions and additional context through informative titles.

Additional improvements

The QFieldCloud user experience continues to be improved. In this release, we have reworked the visual feedback provided when downloading and synchronizing projects through the addition of a progress bar as well as additional details, such as the overall size of the files being fetched. In addition, a visual indicator has been added to the dashboard and the cloud projects list to alert users to the presence of a newer project file on the cloud for projects locally available on the device.

With that said, if you haven’t signed onto QFieldCloud yet, try it! Psst, the community account is free 🤫

The creation of relationship children during feature digitizing is now smoother as we lifted the requirement to save a parent feature before creating children. Users can now proceed in the order that feels most natural to them.

Finally, Android users will be happy to hear that a significant rework of native camera, gallery, and file picker activities has led to increased stability and much better integration with Android itself. Activities such as the gallery are now properly overlayed on top of the QField map canvas instead of showing a black screen.

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[Case Study] Innovating road research and construction

Discover how BRRC revolutionized their field survey workflows with Mergin Maps, enhancing productivity and data accuracy. Learn how their partnership with Lutra Consulting enabled tailored solutions for seamless integration, transforming road research and construction projects.
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[Case Study] Designing surveys for fibre optics rollout

Jacops was starting a new project for the fiber rollout and needed the tools to organise a national survey. Previously they had used tools provided by a partner and needed to find a solution that allowed them to manage the full scope of the project.
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[Blog] Hello from Mergin Maps!

Mergin Maps is a QGIS-powered field survey tool designed to collect data from the field. It is developed by Lutra Consulting, a longstanding contributor, developer, supporter and trainer within the QGIS community.
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Rapporto di allungamento

Rapporto di allungamento

Introduzione

Calcolare il rapporto di allungamento (di Whitebox) usando le espressioni di QGIS.

!!! Abstract "Elongation ratio" Il rapporto di allungamento (E) è:

E = 1 - S / L Dove S è la lunghezza dell'asse corto e L è la lunghezza dell'asse lungo. Le lunghezze degli assi vengono determinate stimando il riquadro di delimitazione minimo.
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[Case Study] Improving wildfire prevention and firefighting readiness

David Galloway works as a volunteer with the Wallcliffe Volunteer Fire Brigade in Western Australia. Volunteer brigades are the front line of firefighting and prevention across the State.
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Snappy QField 3.1 “Borneo” has arrived

The launch of QField 3.0 was a big deal, but now we’re back to focusing on smaller, more frequent updates. Don’t let the shorter change log for 3.1 trick you – there are lots of cool new features in this update!

Main highlights

One of the main improvements in this release is the brand-new functionality to enable snapping to common angles while digitizing. When enabled, the coordinate cursor will snap to configured angles alongside a visual guideline. This comes in handy when adding new geometries while surveying features with regular angles (e.g. buildings, parking lots, etc.). As QField gets more digitizing functionalities, we’ve taken the time to implement a nifty UI that collapses digitizing toggle buttons into a drawer, leaving extra space for the map canvas to shine through.

In addition, the vertex editor - one of QField’s most advanced geometry tools - received tons of love during this development cycle, focusing on improving its usability. Changes worth mentioning include:

  • A new undo button allows users to revert individual vertex manipulations in case of mistaken adjustment, which can save you from having to cancel a large set of ongoing manipulations;
  • The possibility to select vertices using finger tapping on the screen, dramatically improving the user experience;
  • Clearer on-screen markers to represent vertices and
  • Tons of bug fixes to the vertex editor itself, as well as the broader set of geometry tools.

It is now possible to lock the geometry of individual features within a single vector layer. While QField has long supported the concept of a locked geometry state for vector layers, that was until now a layer-wide toggle. With the new version of QField, a data-defined property can dictate whether a given feature geometry can be edited. Interested in geofenced geometry editing? We’ve got you covered ;) This functionality requires the latest version of QFieldSync, which is available through QGIS’ plugin manager.

Noticeably improvements

Permission handling has been improved across all platforms. On Android, QField now delays the permission request for camera, microphone, location, and Bluetooth access until needed. This makes for a much friendlier user experience.

QField 3.0 was one of the largest releases, with major changes in its underlying libraries, including a migration to Qt 6. With the community’s help, we have spent countless hours testing before release. However, it is never a bulletproof process, and that version came with a few noticeable regressions. In particular, camera handling on Android suffered from upstream issues with Qt. We’ve tracked as many of those as possible, making this new version much more stable. One lingering camera issue remains and will be fixed upstream in the next three weeks; we’ll update as soon as it is available.

Finally, long-time users of QField will notice improvements in how geometry highlights and digitizing rubber bands are drawn. We’ve doubled down on efforts to ensure that the digitized geometries and the coordinate cursor itself are always clearly visible, whether overlaid against the canvas’s light or dark parts.

We want to extend a heartfelt thank you to our sponsors for their generous support. If you’re inspired by the developments in QField and want to contribute, please consider donating . Your support will help us continue to innovate and improve this tool for everyone’s benefit.

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[Blog] Mergin Maps 2023: our year in review

This year was another successful year for Mergin Maps, as we are growing to a feature-rich and scalable enterprise geodata collection solution.
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