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QGISでラインのスタイルを設定する方法〜色・太さの変更から矢印表示まで〜 - QGIS LAB by MIERUNE

はじめにQGISでデータを読み込むと、システムが自動的に選択した色で表示されます。しかし、この自動設定された色は背景の地図や他のレイヤとの組み合わせによっては、データが見にくくなる場合があります。この記事では、QGISでライン（線）のスタイル（見た目）を変更する基本的な方法を解説します。デフォルトで用意されているスタイルの選択から、色や太さの調整、さらには矢印や塗りつぶし線などの高度な設定まで、段...
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現地調査でQGISの地図を使おう！〜GeoPDFの作成方法と活用事例〜 - QGIS LAB by MIERUNE

はじめにQGISでは、GeoPDFという通常のPDFファイルに地理空間情報（位置情報）を埋め込んだ特殊なファイル形式を作成することができます。GeoPDFは、レイヤの表示・非表示の切り替えやGPS連携による現在位置の確認など、現地調査や地図の共有において非常に有用な機能を備えています。この記事では、GeoPDFの作成方法の具体的な手順と活用例を詳しく解説します。QGISの強力な機能を使って、オリジ...
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初めてのQField！QGISプロジェクトをスマホに持ち出す手順 - QGIS LAB by MIERUNE

はじめにQFieldは、QGISで作成したプロジェクトをスマートフォンなどで活用できるオープンソースのモバイルGISソフトウェアです。この記事では、QGISで作成したプロジェクトをQFieldに転送し、モバイルデバイスで利用できるようにするための基本的な手順を解説します。QFieldの概要と活用事例について詳しく知りたい方は、以下の記事をご覧ください。QGISでプロジェクトの準備QFieldプロジ...
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QField 3.7 “Haida Gwaii”: Polishing a great experience

For QField 3.7, we opted for a shorter development cycle that focused on polishing preexisting functionalities from feature form editor widgets improvement through to better nearby Bluetooth device discovery. Of course, we couldn’t help ourselves and still packed in some nice functionality that we thought deserved to reach QField’s growing community as soon as possible.

Main highlights

One of the most interesting new functionalities from this development cycle has been the ability to stamp details on photos taken by QField’s in-app camera. A basic version of this has been supported for a while now; this new version offers flexible customisation of details stamping onto photos, including changing the font size, colour, and horizontal position, as well as providing users with the ability to completely change the details via expression-driven templates and add image overlays onto the photo.

The custom details stamping configuration lives within project files, allowing for individual projects to drive styling and details. The configuration interface is provided by QFieldSync and can be found in the project properties dialog by switching to the QField panel when setting up projects in QGIS:

The other significant addition in this release is the new plugin manager’s Available Plugins tab, which offers a curated list of plugins that can easily be installed with a single tap. The list makes it much easier to discover plugin-delivered functionalities such as online routing, geocoding searches, and much more.

The plugin manager can also alert users of available updates for their installed plugins, ensuring that crucial bug fixes and improvements are easily delivered. When a new version is released, users can update via a single tap. We are looking into the possibility of enabling automated plugin upgrades soon.

Long-time users of QField are probably aware of a nifty feature that allowed individual project layers to be locked, and for that lock to be driven by a data-defined property expression. For this new version, we’ve supercharged the layer lock functionality by breaking it down into four distinct vector layer permissions that can be disabled: i) feature addition, ii) attribute editing, iii) geometry editing, and iv) feature deletion. These permissions can be disabled by activating a checkbox or conditionality turned on via a data-defined property expression.

The disabling of permissions using a data-defined property expression allows for interesting scenarios when paired with QField-driven expression context variables such as the user name of a logged-in QFieldCloud account (@cloud_username), GNSS positioning (@gnss_coordinate) and more. Users can easily restrict permissions based on the user interacting with a cloud project, or form advanced geofencing-like rules based on location, time of the day, etc. For more details on available variables, read this page on QField’s growing documentation site.

Improvements all around

As mentioned above, this version focused on polishing preexisting functionality. Noteworthy improvements include:

  • support for multiple column display as well as the ability to filter value relation lists;
  • support for reversing the sorting order of the relationship editor’s children lists;
  • smoother scanning process to discover nearby Bluetooth devices when adding external GNSS devices; and
  • support for feature identification against vector tile layers (give that a try with the new OpenStreetMap shortbread vector tiles!).

Finally, life for QFieldCloud users has improved with the support for resuming large file downloads when fetching a cloud project, eliminating the need to restart from scratch after an interruption due to poor connectivity. In addition, users will notice a new notification badge on the top-left main menu button, indicating that a cloud project has pending changes ready to be pushed to the server.

We hope you enjoy this new version as much as we do delivering it to you. Happy field mapping!

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QField 3.7 “Haida Gwaii”: Polishing a great experience

For QField 3.7, we opted for a shorter development cycle that focused on polishing preexisting functionalities from feature form editor widgets improvement through to better nearby Bluetooth device discovery. Of course, we couldn’t help ourselves and still packed in some nice functionality that we thought deserved to reach QField’s growing community as soon as possible.

Main highlights

One of the most interesting new functionalities from this development cycle has been the ability to stamp details on photos taken by QField’s in-app camera. A basic version of this has been supported for a while now; this new version offers flexible customisation of details stamping onto photos, including changing the font size, colour, and horizontal position, as well as providing users with the ability to completely change the details via expression-driven templates and add image overlays onto the photo.

The custom details stamping configuration lives within project files, allowing for individual projects to drive styling and details. The configuration interface is provided by QFieldSync and can be found in the project properties dialog by switching to the QField panel when setting up projects in QGIS:

The other significant addition in this release is the new plugin manager’s Available Plugins tab, which offers a curated list of plugins that can easily be installed with a single tap. The list makes it much easier to discover plugin-delivered functionalities such as online routing, geocoding searches, and much more.

The plugin manager can also alert users of available updates for their installed plugins, ensuring that crucial bug fixes and improvements are easily delivered. When a new version is released, users can update via a single tap. We are looking into the possibility of enabling automated plugin upgrades soon.

Long-time users of QField are probably aware of a nifty feature that allowed individual project layers to be locked, and for that lock to be driven by a data-defined property expression. For this new version, we’ve supercharged the layer lock functionality by breaking it down into four distinct vector layer permissions that can be disabled: i) feature addition, ii) attribute editing, iii) geometry editing, and iv) feature deletion. These permissions can be disabled by activating a checkbox or conditionality turned on via a data-defined property expression.

The disabling of permissions using a data-defined property expression allows for interesting scenarios when paired with QField-driven expression context variables such as the user name of a logged-in QFieldCloud account (@cloud_username), GNSS positioning (@gnss_coordinate) and more. Users can easily restrict permissions based on the user interacting with a cloud project, or form advanced geofencing-like rules based on location, time of the day, etc. For more details on available variables, read this page on QField’s growing documentation site.

Improvements all around

As mentioned above, this version focused on polishing preexisting functionality. Noteworthy improvements include:

  • support for multiple column display as well as the ability to filter value relation lists;
  • support for reversing the sorting order of the relationship editor’s children lists;
  • smoother scanning process to discover nearby Bluetooth devices when adding external GNSS devices; and
  • support for feature identification against vector tile layers (give that a try with the new OpenStreetMap shortbread vector tiles!).

Finally, life for QFieldCloud users has improved with the support for resuming large file downloads when fetching a cloud project, eliminating the need to restart from scratch after an interruption due to poor connectivity. In addition, users will notice a new notification badge on the top-left main menu button, indicating that a cloud project has pending changes ready to be pushed to the server.

We hope you enjoy this new version as much as we do delivering it to you. Happy field mapping!

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[Case Study] Monitoring historic buildings in Derbyshire

Discover how the Derbyshire Historic Buildings Trust uses Mergin Maps and volunteers to survey and protect Grade 2 listed buildings at risk in the UK.
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Crowdfunding Campaign Completed: QGIS 3D for Open Source Digital Twins

The QGIS community has successfully funded the 3D Digital Twins project—thank you for your support! Development begins soon, with updates to follow.
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[Blog] Mergin Maps gets sketchy

Draw free-hand notes on your maps with Mergin Maps' new sketching feature—easy to enable, fun to use, and now available in the mobile app.
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QGISでポイントのスタイルを変更する方法〜マーカーの色変更からSVG画像の活用まで〜 - QGIS LAB by MIERUNE

はじめにQGISでポイントを含むレイヤを読み込むと、デフォルトでランダムな色の丸いマーカーが表示されます。しかし、避難所なら緑色や避難所のアイコン、病院なら赤色の十字など、データの内容に応じて適切なマーカーに変更することで、地図がより見やすく、理解しやすくなります。この記事では、QGISで点の見た目（マーカー）を変更する方法について解説します。基本的な色の変更から、詳細な設定、さらには画像ファイル...
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QGISの過去バージョンをインストールする方法 - QGIS LAB by MIERUNE

はじめにQGISは常に進化を続けており、定期的なアップデートによって機能が継続的に向上しています。ただし、実際の業務では最新版を使用できない場面も存在します。特定のプロジェクトで使用しているプラグインが最新版に対応していない場合や、既存のワークフローとの互換性を保つ必要がある場合には、過去バージョンのQGISを継続使用することが求められます。この記事では、QGISの過去バージョンが必要となるケース...
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