Preliminary Study on Visualization of Building Standard Laws by HoloLens- A Case Study in Kanazawa City ○SHEN Zhenjiang *1, SUGIHARA Kenichi *2, WU Teng*3 , TENG Xiao*3*1 Professor, School of Environmental Design, Kanazawa University, D.Eng.
*2 Professor, School of Management, Gifu Keizai University, D.Eng.
*3 Graduated Student, School of Environmental Design, Kanazawa University
Keywords: Building Regulation, Visualization, Planning Support Tool, HoloLens.

1. Introduction

a free degree to evaluate the effect of BFR by means ofContribution of our research is to use SketchUp,visualization of usable space of building. Chen and Shen

Unity3D and HoloLens to visualize the image of thecreated a planning support tool for visualization ofplanning regulations applied for building and soughtbuilding form regulation and building form legality

ways to help consensus between stakerholders andchecking tool (Chen and Shen, 2017).

planners. Meanwhile, we can visualize the conflicts

Althoughsuch

researches enhancedplanning

between existing non-qualified buildings and Building

efficiency and people’s understanding of Building Form

Standard Law(BSL), and visualize their comparisonRegulation, it could be enhanced with the help ofwith the 3d virtual model based on the BSL law, which

advanced devices to show information in virtual place

aims at improvement of stakeholders’ understanding of

more realistic, such as augmented reality (AR), virtual

the BSL in planning practice.

reality (VR), mixed reality (MR).

When building a new house, it is necessary to makeSuch technologies were tested in large number ofa building plan that complies with the many regulations

researches. Wang, X. (2007) used augmented reality tounder the BSL. At present, there are many regulations

plan virtual construction site, by a prototype of anon buildings according to the BSL. The BSL is the main

AR-based construction planning tool named AR Planner.

law that regulates buildings and their equipments. TheTang, C. H., Wu, W. T., et al. (2009) used virtual reality

BSL was established in 1950 and has been amended

to determine how emergency signs facilitate way-many times to meet new technologies and to cope withfinding,

new demands, as the latest version of it was establishedenvironment. El-Shimy, H., Ragheb, G., et al. (2015)

in 2016 (Takeichi, N., Hagiwara, I., et al., 2003).

used mixed reality as a simulation tool in urban

which wasdoing experiment in virtual

In the BSL, Building Form Regulation (BFR) plays

planning that helps to build a community and support

a quite important role on limiting the architectural

citizen’s participation. However, such researches did notdesign according to the zone restrictions implemented

concern building standards or building regulations,in a parcel of urban planning area in Japan. Nogawa etwhich is the theme of this research.

al. (2004) analyzed the usable space of building under

Therefore, by using HoloLens’s MR (Mix Reality)

effect of oblique line, height limit and so on, which areproperly, the prebuilt model of building regulation in adesignated in BFR. Kawakami and Ohnishi (2013) findparcel can be seen in HoloLens, and were used for

effect of BFR based on analyzing the relation between

corresponding to a real-site building in our case study.

parcel area, shape, and width of its front road when
consider deregulation of Setback and Application

2. Methodology

Distance. Besides, Fujita and Kawakami (2008) defines

First, we learned how to use HoloLens, which is MR

日本建築学会情報システム技術委員会
第 42 回情報･システム･利用･技術シンポジウム論文集， 16-19 ， 2019 年 12 月，東京
Proceedings of the 42nd Symposium on Computer Technology of Information ，Systems and Applications ， AIJ ， 16-19 ， Dec. ， 2019 ， Tokyo－ 16 －

device that can use 3d models creadted by SketchUp,

Figure 2.

the software that creates a stereogram to be introduced
into Unity3d and HoloLense. Next, we selected one
building that seems to be ineligible from the housing
denseareain

Kanazawa

city,andmadeaTable. 1 Building regulation of target property

Floor-area ratio
Coverage ratio
Road slanting limit

three-dimensional model using SketchUp. Then, weinvestigated what kind of building regulations areapplied in the parcel where the building is located, andmade a three-dimensional view, and superimposed it on

Neighboring slash limit
North diagonal limit

200%
60%
1:1.25
Applicable distance:20m
20m+(1:1.25)
10m+(1:1.25)

Table. 2 Measurement result of target property

the model of the building to check whether it wasBuilding width

5.0m

ineligible. At this time, when the building is out of theHeight (the top of the roof)

8.5m

building regulation, it can be said that the existing

Height (the tip of the roof)

6.0m

building is disqualification. By verifying the model

depth

8.0~10.5m

made on HoloLens, we examined whether HoloLens

Front road width

4.0m

could be introduced into the construction industry.
HoloLens is a computer with a head mounted
display. Microsoft announced it in 2015 and supports
Windows 10. SketchUp is a 3D design tool developed
and provided by Trimble, USA. It is possible to perform
sensory 3D modeling as viewed in 3D space.

3. Case study
Using Google maps, we selected one building from thedensely populated area in Kanazawa city. In terms of
selecting a building, there are two points: a smallbuilding that is easy for beginners to create models, andFig. 1 Three-dimensional model (building only)

a building that is built along a narrow road and that is
not very new, because a building with the two conditions
is possible to be an existing disqualified building.
AccordingtoKanazawa City

Town

Development

Support Information System, the area with the selectedbuilding is the area dedicated to the first-class high-risedwellings, and the various building restrictions are asshown in Table 1.
We used Google Earth Pro to measure the width,height, depth, and width of the front road in order to get
the necessary information to create the image of thebuilding restrictions and the top view of the building
with SketchUp. The results are summarized in Table 2.
And the three-dimensional model of the building

Fig. 2 Three-dimensional model (including building
regulation information)

appearance created by SketchUp based on these
conditions is shown in Figure 1. Then, a surface
representing the building regulation is created, and thebuilding regulation form can be understood as shown in報告 H92

4. Modeling and onsite test
We went to the site and compared it with the actual
building as shown in Figure 3. Figure 4 shows the scene－ 17 －

of using HoloLens. As we can see, comparing to usual

regulation law. We thought it would be easier to3D models that needed to be shown on heavy flat screen,

understand the illegal situation if the house was

HoloLens can show 3D models on a portable convenient

projected with the planning regulations with yellow box.

screen. Planners can use this facility to create model in

It is possible to move it by resizing or gesture when

their workroom and bring the models to real site andlooking at the projected regulation model by HoloLens,

judge its performance.

for this inputting the model created by SketchUp into
software called unity3d is necessary.

Fig. 5Model Overlay-Part 1

Fig. 6

Model Overlay-Part 2

Fig. 3 Target property

There were difficulties found when we went to thereal site and saw the model overlaid with the realbuilding through HoloLens. The first point is that it isdifficult to define the scale of the model. And anotherpoint is that it is difficult to fit the model to the proper
position. Both were able to adjust to the approximate
position in order to change the size of the model with
their own gestures and make them fit properly, but theyFig. 4 Trying to use HoloLens

were slightly deviated from that or their height did notmatch. It is possible to visualize the building code in aView in HoloLens is in Figure 5 and 6. In HoloLens’view, what is yellow and transparent is the regulation.

rough position, but we felt that it is difficult at thisstage to look at the correct position and size correctly.

It was a little difficult to see if the actual house wasIf the above problems can be ameliorated, it isjumping out of the model of the house, but it canconsidered possible enough to be introduced into theconfirm that the target we selected does not fit thebuilding industry. In order to do that, we thought that it

報告 H92－ 18 －is necessary to make improvements in the functionality

building regulations with better quality.

of HoloLens. First, regarding the adjustment of thescale of the model, it is considered that the correct size

Acknowledgements

can be obtained by changing the size of the box byThis work is supported by JSPS Grant-in-Aid fornumerical input. For fine adjustment to the proper

Scientific Research (C 19K04750 ), Development ofposition, move the rough position with a gesture if there

Mixed

is a button that can move in the east, south, east, south

Performance of Zero Energy House on Energy-saving

RealityToolfor

Visualizing

Building

and west, and adjust the position more precisely byadjusting the details with the button Think it will bepossible.

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Beside this, other researchers may also research on
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報告 H92

El-Shimy, H., Ragheb, G., & Ragheb, A. (2015). Using mixed
reality as a simulation tool in urban planning project for

https://support.microsoft.com/en-us/hub/4338666/hololens-help
HoloLens help11)

https://www2.wagmap.jp/kanazawa-mss/Portal Kanazawa
City MSS(Machizukuri Support System－ 19 －