Comprehensive approach for building outline extraction from LiDAR data with accent to a sparse laser scanning point cloud

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10364370" target="_blank" >RIV/00216208:11310/17:10364370 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.14311/gi.16.1.6" target="_blank" >http://dx.doi.org/10.14311/gi.16.1.6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/gi.16.1.6" target="_blank" >10.14311/gi.16.1.6</a>

Result language

angličtina

Original language name

Comprehensive approach for building outline extraction from LiDAR data with accent to a sparse laser scanning point cloud

Original language description

The method of building outline extraction based on segmentation of airborne laser scanning data is proposed and tested on a dataset comprising 1,400 buildings typical for residential and industrial urban areas. The algorithm starts with setting a special threshold to separate roof points from bare earth points and low objects. Next, local planes are fitted to each point using RANSAC and further refined by least squares adjustment. A normal vector is assigned to each point. Similarities among normal vectors are evaluated in order to assemble planar or curved roof segments. Finally, building outlines are formed from detected segments using the α-shapes algorithm and further regularized. The extracted outlines were compared with reference polygons manually derived from the processed laser scanning point cloud and orthoimages. Area-based evaluation of accuracy of the proposed method revealed completeness and correctness of 87 % and 97 %, respectively, for the test dataset. The influence of parameters like number of points per roof segment, complexity of the roof structure, roof type, and overlap with vegetation on accuracy is evaluated and discussed.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10508 - Physical geography

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Geoinformatics FCE CTU

ISSN

1802-2669

e-ISSN

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Volume of the periodical

16

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

12

Pages from-to

91-102

UT code for WoS article

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EID of the result in the Scopus database

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