Level of details, LoD, is a new concept that comes widely to our industry. We see the name in the Swedish Geoprocess standard, it’s a general term regarding BIM data in the form of solids.
LoD is referred to in steps 0-4 alternatively, using 0, 100, 200, 300, 350 and 400 but in “our” world, we use 0-4. The degree of detail simply indicates how detailed we describe an object, starting from two dimensions to three dimensions.
Thus LoD 0 is a 2D, or “2.5D” (that is, where there is 2D data and a height, but not several height positions). LoD 1 generally describes a house as a cube in 2D data with two heights. LoD 2 has more details such as roof, LoD 3 is even more specific with maybe a bay window and finally LoD4 has information about the inside.
In Topocad we use LoD from version 18. You can specify the general level of detail in the Project Settings, directly in the drawing or directly on the object. The drawing settings are used as a filter to show only those objects that have the degree of detail you specify.
The degree of detail can also be used in the filter function.
There is a way to show different level of details depending on the objects different needs. For some data products it is sufficient to use 2D data, or “2.5D”. For example, in a map or even in a landscape model with a large extent where volume information does not fit.
When we begin to create city models, we need to use more detailed information and information in 3D. At least LoD1 is needed to present a city.
If we are in a civil planning project, a 3D detailed development plan, or a new road, we need to show the information with even greater detail. Then LoD2 is needed, where we show the exact shape of the roof, or on a road we also show slopes, sidewalks, refuges, roundabouts.
In LoD3 and LoD4 we begin to get very close to reality, maybe the level needed to sell a project to buyers in a house building project or show a complete infrastructure with lighting posts, plants, trees, and more.
LoD – not just for design
With Topocad 18 we can easily survey the level of detail and for later versions of 18, we will expand the functionality to survey volumes according to different LoD levels. For example, surveying a house in LoD 1 or 2 by surveying three points on the wall corner and then one or two points to create a height = volume.
If we are to create basis for models, the reality also needs to consist of volumes and thus surveying according to some of the detailing levels. With Topocad we make it easy to survey volumes, maybe even easier than surveying a two-dimensional map!
Release of Chaos desktop 9.0
Chaos desktop 9.0 is here – a new version focusing on usability and efficiency
Now, the 9th version of Chaos desktop is released, Adtollo’s system for efficient and powerful document and drawing management.
Version 9 contains several new features that make the system more user-friendly and provide a better workflow. Among other things, the new tab Cloud is found on the main menu for ea...
As you probably know, GEO Business in London in May is cancelled due to the Corona virus. We are so sorry we cannot meet you there. Instead of participating on our planned workshop, you can join it for free online:
Calculate volumes like it’s 2020!
In this webinar, your will learn how to optimize procedures for your excavation work and how to make rich volume calculations.
Meet our coworkers to get an insight in how it is working at Adtollo!
Name: Fredrik Sundberg
Working as: Product specialist Topocad
Employed at Adtollo since: 2007
Background: Trained in GIS/Physical community planning. Previously worked on the distribution of Autodesk’s products in the Nordic region.
Fredrik has worked with Topocad for more than 12 years and is one of us with the broade...
Municipal collaboration is strengthened with TopoDirekt
Read our user story about TopoDirekt!
In Skåne, in the southern part of Sweden, three municipalities share their GIS work. Now, the cooperation is strengthened as the new surveying and mapping system TopoDirekt is introduced. In one of the municipalities, Hässleholm, it only took ten months to go from decision to a fully functioning system.
For about 20 years, the municipalities of Hässleho...
Satellite images as a mapping tool even when the jungle is dense and it’s often cloudy
Read our story about surveying in Indonesia!
Indonesia, with more than 270 million inhabitants, is on its way of becoming one of Asia’s star economies. While the economy is booming, there is a great need for support and development on the countryside. One example is in the province of Riau, on the island of Sumatra, where mapping of district boundaries should give six districts a better control an...