What is LOD, and what does the number in the LOD name mean? – GEO RĪGA

Frequently asked questions / Manual

Manual

- What is GEO RĪGA?
- What is the purpose of GEO RĪGA?
- Who is the author of the data published by GEO RĪGA, and who is liable for the content of the data layers?
- Is information from the GEO RĪGA portal considered a legal document?
- Is it possible to receive data published by GEO RĪGA about my property?
- Is it possible to receive data published by GEO RĪGA as map services or for download?
- Does GEO RĪGA contain data on communication networks/ public utilities and their ownership?
- Which coordinate system does GEO RĪGA thematic maps use?
- What is LOD, and what does the number in the LOD name mean?
- Why do the building models in the LOD models not match the cadastral data?
- Whom shall I contact with queries or questions?
- GEO RĪGA thematic maps
- Map tools
- For communication and information
- Navigation tools
- Search tool
- Data layers
- Legend
- Measurement
- Sharing
- Swipe
- Printing
- Drawing
- Coordinate conversion
- Add data
- Data selection
- Attribute table
- Scale and coordinates
- LOD
- 3D views
- 3D view map tools
- Basic information about the GEO RĪGA portal and its available content
- Geographic information systems as a tool for process management and data-based decision-making

What is LOD, and what does the number in the LOD name mean?

LOD (level of detail) stands for the level of detail of a 3D model, it is applied to the geometrical detailing of 3D models, mainly buildings.

LOD0 is the lowest level of detail. It represents the area (footprint) of the building and sometimes also the roof edge polygons, marking the transition from 2D to 3D GIS.

LOD1 is a common mass or block model for buildings with flat roof structures. It shows the 2D outline of the building with minimum, maximum or average height. LOD1 is a coarse prismatic model usually obtained by extruding the LOD0 model upwards.

LOD2 is a slightly more complex model with a simplified roof shape, where parts of the object are modelled in several semantic classes (for example, roof, wall). LOD2 is used for urban areas and projects.

LOD3 is an architecturally detailed 3D model which is significantly more complex than previous models. This model shows in detail wall and roof structures with windows, doors, and contains facade details.

The LOD4 model complements LOD3 by including indoor representation. This model shows in detail the interior and exterior structures of buildings, such as stairs, doors, furniture, etc.

The website processes only the necessary cookies that are essential and allow you to access different parts of the website. The necessary cookies are stored on your computer, smartphone, tablet or other device during the visit and browsing of the website or for a certain period of time. These cookies are necessary for the operation of the website, which means they cannot be turned off. Therefore, the user’s consent is not required for this cookie category.