How do you perform 3D analysis and measurements in QGIS, such as volume, slope, or visibility?

由人工智能和领英社区提供技术支持

Quantum GIS (QGIS) is a powerful and versatile open source software for geographic information systems (GIS). One of its features is the ability to create and explore 3D views of spatial data, such as terrain, buildings, or vector layers. However, 3D views can also be demanding on your computer resources and affect the performance of QGIS. In this article, you will learn some tips to optimize your 3D view settings and improve your 3D analysis and measurements in QGIS, such as volume, slope, or visibility.

此文章中的业界达人

由社区从 3 条内容中精选。了解更多

1 Enable 3D view

The first step to use 3D views in QGIS is to enable the 3D view tool, which is located in the View menu or in the toolbar. This will open a new window where you can display your map layers in 3D. You can also dock the 3D view window to the main QGIS window by dragging it to the edge of the screen. To navigate the 3D view, you can use the mouse wheel to zoom in and out, the left mouse button to rotate the view, and the right mouse button to pan the view.

添加您的观点

Rocio Suarez

Artificial Intelligence | Quantum Science| Data Science | Space Exploration | Enterprise Architecture | Digital Transformation
举报内容
In QGIS, for performing 3D analysis and measurements like volume, slope, or visibility use plugins. Use the 'Terrain Analysis' tool in the Processing Toolbox for volume and slope measurements. It calculates slope, aspect, hillshade, and other terrain-related attributes from a digital elevation model (DEM). For volume calculations, use the 'Raster Volume' tool under the Raster Analysis section to estimate the volume between a DEM and a specified base level. Use the' Viewshed Analysis' plugin for visibility analysis, such as viewshed or line-of-sight analyses. This helps determine visible areas from a specific observer point over a terrain.

已翻译

赞

2 Configure 3D view settings

To customize your 3D view, you can access the 3D view settings by clicking on the gear icon in the 3D view toolbar. Here you can adjust various parameters, such as the elevation source, the vertical scale, the lighting, the skybox, and the camera options. For example, you can choose to use a DEM (digital elevation model) layer as the elevation source for your 3D view, or you can use a constant value for a flat surface. You can also change the vertical scale to exaggerate or reduce the elevation differences in your 3D view. To improve the performance of your 3D view, you can lower the resolution of the elevation source, reduce the shadow quality, or disable the skybox.

添加您的观点

3 Add 3D symbols and labels

To enhance the appearance and readability of your 3D view, you can add 3D symbols and labels to your vector layers. To do this, you need to open the layer properties dialog and go to the 3D View tab. Here you can enable the 3D rendering option and choose from different types of 3D symbols, such as simple shapes, extruded polygons, or models. You can also modify the height, size, color, and rotation of your 3D symbols. To add labels to your 3D view, you need to go to the Labels tab and enable the labeling option. You can then choose the label field, font, size, and placement of your labels. You can also enable the decluttering option to avoid overlapping labels in your 3D view.

添加您的观点

Swaroop Kallakuri

CTO - Piren Technology | Follow me to get daily insights about A.I & Quantum computing
举报内容
In the 3D view, you can add 3D symbols and labels to your data to provide additional context and information. QGIS supports various 3D symbol types, including cones, cubes, spheres, and custom 3D models. You can also add labels to features in the 3D view to display attribute information or other relevant data.

已翻译

赞

4 Perform 3D analysis and measurements

One of the benefits of using 3D views in QGIS is that you can perform 3D analysis and measurements on your spatial data. For example, you can use the 3D measurement tool in the 3D view toolbar to measure distances, areas, and angles in 3D space. You can also use the Identify tool to get information about the features in your 3D view, such as their attributes, elevation, and coordinates. To perform more advanced 3D analysis, such as volume, slope, or visibility, you can use the QGIS 3D Analysis plugin, which is available in the QGIS plugin repository. This plugin allows you to create and visualize 3D grids and rasters from your vector or DEM layers and apply various 3D analysis functions.

添加您的观点

Swaroop Kallakuri

CTO - Piren Technology | Follow me to get daily insights about A.I & Quantum computing
举报内容
QGIS offers several tools and plugins for performing 3D analysis and measurements. For example, you can calculate volumes using the "Volume Calculation" tool, analyze slope using the "Terrain Analysis" tools, or determine visibility using the "Viewshed Analysis" tool. These tools utilize the elevation data in your project to generate 3D analysis results.

已翻译

赞

5 Export 3D view as image or video

If you want to share or present your 3D view, you can export it as an image or a video file. To export your 3D view as an image, you can use the Save as image option in the 3D view toolbar. This will save your 3D view as a PNG file with the same resolution as your 3D view window. To export your 3D view as a video, you can use the Export as video option in the 3D view toolbar. This will open a dialog where you can specify the video settings, such as the format, resolution, frame rate, and duration. You can also record a camera path by moving your mouse in the 3D view window and clicking on the Add keyframe button. The video will then follow the camera path that you have recorded.

添加您的观点

6 Learn more about 3D views in QGIS

This article has given you some tips to optimize your 3D view settings and improve your 3D analysis and measurements in QGIS. However, there is much more to learn and explore about 3D views in QGIS. You can find more information and tutorials on the QGIS website, the QGIS documentation, and the QGIS blog. You can also join the QGIS community and ask questions or share your feedback on the QGIS user mailing list, the QGIS forum, or the QGIS social media channels.

添加您的观点

Quantum GIS

+ 关注

给文章评分

我们借助人工智能创建了此文章。您认为这篇文章怎么样？

很棒不太好

举报此文章

查看全部

How do you perform 3D analysis and measurements in QGIS, such as volume, slope, or visibility?

1

2

3

4

5

6

1 Enable 3D view

2 Configure 3D view settings

3 Add 3D symbols and labels

4 Perform 3D analysis and measurements

5 Export 3D view as image or video

6 Learn more about 3D views in QGIS

Quantum GIS

给文章评分

感谢您的反馈

更多Quantum GIS相关文章

更多相关阅读内容