from floor plans to condominium rights through an ... · content •introduction •austrian...

From Floor Plans to Condominium

Rights Through an Augmented Reality

Approach

Gerhard Navratil, Marco Schwai, Stefan Vollnhofer, Philip Konturek,

Ioannis Giannopoulos TU Vienna, Dept. for Geodesy and Geoinformation

Content

• Introduction

• Austrian cadastre: Condominium rights and floor plans

• Modelling condominium rights

• Creation of a holographic-like model

• Interaction with the model

• First results from user tests

• Conclusions and future work

04.10.2018 2 Navratil, Schwai, Vollnhofer, Konturek, Giannopoulos, 3D-Cadastre WS

Introduction

Condominium rights are typical motivating examples for 3D cadastres

Process shown in the presentation

• Where to get data from (resurvey for each condominium is unrealistic)

• How to visualize the model and interact with it (manual information extraction)

Technology used: Augmented reality (AR) glasses

Main questions:

• Necessary interaction dialogs?

• How to implement the interaction?

• How to test performance?


Austrian cadastre: Condominium rights and

floor plans

Cadastre purely 2D

Condominium rights as shared ownership based on use value

Creation of condominium requires

floor plans („Parifizierungsplan“)


Room size

Room type

Floor cover

Height of floor

Room height

Modelling condominium rights

Floor plans contain height information and position of walls, doors, and

windows (but no roof)

Height generalization is necessary (e.g., 1cm tilt of floor? Arbitrary

tolerance of 15cm used)

Manual creation, not automatic process yet

(problem data source – from DWG to PDF)

Software ArchiCAD 21 (uses IFC)


Creation of a holographic-like model

Model shall be suitable for Augmented Reality (Meta2-glasses)

Data model from gaming engine (Unity3D)

Adapation of model required – floor-based, not volumetric (easier to

attach labels)

Color scheme applied to separate apartments

Decision: Each floor is a different object (objects can be manipulated)

Reference points need to be correctly defined (used, e.g., for rotation,

cannot be changed later during use by built-in function


Interaction with the model (1)

Important interactions provided out tof the box

• Grab and move an object (a floor)

• Rotate an object (a floor)

• Scale an object (a floor)

Test of three types of rotations

• Two cubes – touch to rotate

• Swipe movement of the hand

• Rotate a small cube to rotate the model


Typically connected interactions

can cause problems

Intuitive but slow

Fail (hand recognition)

Not intuitive

Interaction with the model (2)

Pop-up menus implemented for additional functionalities

Tests using different tasks

• How many rooms are there on floor 1 / in total?

• How many rooms does apartment TOP 5 contain?

• How many rooms of apartment TOP 3 border to the hallway?

• How many apartments are on ground floor / in total?

• How many square meters has apartment TOP 4?

• On which floor(s) are rooms of apartment TOP 7?

• Hide all floors except the basement!


Looks strange from outside …

First results from user tests

First impressions:

• Moving, rotating and scaling seems to be quite intuitive

• Seems to be easier to handle for non-experts than traditional 3D-

CAD

• We are not used that we can change our position to inspect the

model from a different perspective

• Collision detection requires improvement (finger – button)


Conclusions and future work

• Possible to take floor plans and transform the information into a

holographic-like model for AR technology

• First user tests are encouraging

To do

• Define more interactions (merge/split objects, rearrange, change

attributes, etc.)

• Implement more possibilities for gesture-based interaction

• Test additional channels for interactions (e.g., voice commands,

joystick, eye-tracking, etc.)


Special Issue

Remote Sensing for Land Administration

Special Issue Editor: Prof. Rohan Bennett

Swinburne University of Technology

Prof. Peter van Oosterom

TU-Delft

Prof. Chrit Lemmen

University of Twente

Dr. Mila Koeva

University of Twente

Submission Deadline: 19 April 2019

IMPACT FACTOR

3.406

This Special Issue is dedicated to land administration, that is, the systems used to govern the way land tenure, use, and value are organized amongst people within a jurisdiction. Papers are expected to address the following topics: - Comparisons of alternate remote sensing techniques for

2D and 3D data capture relevant to land administration and cadastres.

- Design and testing of techniques for 2D and 3D cadastral feature extraction from remotely-sensed data sources

- Modelling of data production workflows for scaled 2D and 3D cadastral production

- Observations from illustrative cases highlighting leading practices in data integration and utilization for 2D and 3D land administration

Special Issue

Applications of GIScience for Land

Administration

Special Issue Editor:

Dr. Gerhard Navratil

Technical University Vienna

Submission Deadline: 30 April 2019

IMPACT FACTOR

1.723

This Special Issue aims to present the application of innovative concepts from GIScience to land administration to bridge the gap between universities & authorities, developed & developing countries, LA experts & GI specialists. We invite original research contributions on (but not restricted to) the following topics: - Developments in 3D modeling and visualization for land

administration to meet the demands of smart cities - Innovative use of and experiences with VGI and crowd

sourcing in land administration - Application of GNSS and remote sensing - Enhancements of land administration models and

automation of land administration processes - Application of developing technologies like linked data,

NoSQL databases or blockchain technology - Mass appraisal of land value using GIS tools

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