An accuracy assessment method for geographical line data sets based on buffering

Tveite, Håvard

doi:10.1080/136588199241445

Cited by 107 publications

(74 citation statements)

References 8 publications

(5 reference statements)

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“…Consecutive collinear line segments (given an empirically predetermined distance tolerance) can be merged together and thus treated as a single segment during matching. Alternatively, two LineStrings can be matched using the Buffer Overlay Statistics (BOS) methods (Tveite, 1999). Geometrically matched LineStrings are considered equal.…”

Section: Matching Geometry Of Line Segmentsmentioning

confidence: 99%

Spatio-Semantic Comparison of Large 3d City Models in Citygml Using a Graph Database

Nguyen¹,

Yao²,

Kolbe³

2017

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:A city may have multiple CityGML documents recorded at different times or surveyed by different users. To analyse the city's evolution over a given period of time, as well as to update or edit the city model without negating modifications made by other users, it is of utmost importance to first compare, detect and locate spatio-semantic changes between CityGML datasets. This is however difficult due to the fact that CityGML elements belong to a complex hierarchical structure containing multi-level deep associations, which can basically be considered as a graph. Moreover, CityGML allows multiple syntactic ways to define an object leading to syntactic ambiguities in the exchange format. Furthermore, CityGML is capable of including not only 3D urban objects' graphical appearances but also their semantic properties. Since to date, no known algorithm is capable of detecting spatio-semantic changes in CityGML documents, a frequent approach is to replace the older models completely with the newer ones, which not only costs computational resources, but also loses track of collaborative and chronological changes. Thus, this research proposes an approach capable of comparing two arbitrarily large-sized CityGML documents on both semantic and geometric level. Detected deviations are then attached to their respective sources and can easily be retrieved on demand. As a result, updating a 3D city model using this approach is much more efficient as only real changes are committed. To achieve this, the research employs a graph database as the main data structure for storing and processing CityGML datasets in three major steps: mapping, matching and updating. The mapping process transforms input CityGML documents into respective graph representations. The matching process compares these graphs and attaches edit operations on the fly. Found changes can then be executed using the Web Feature Service (WFS), the standard interface for updating geographical features across the web.

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Section: Matching Geometry Of Line Segmentsmentioning

confidence: 99%

Spatio-Semantic Comparison of Large 3d City Models in Citygml Using a Graph Database

Nguyen¹,

Yao²,

Kolbe³

2017

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…For quality measurement, we use an adaptation of the buffer overlay statistics method (BOS) introduced by Tveite and Langaas [32]. To avoid confusion, the adapted method used here is referred to as Buffer Overlay Method (BOM).…”

Section: Definition Of a Geometric Quality Measurementioning

confidence: 99%

A Supervised Approach to Delineate Built-Up Areas for Monitoring and Analysis of Settlements

Harig

Burghardt

Hecht

2016

IJGI

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Abstract:Monitoring urban growth and measuring urban sprawl is essential for improving urban planning and development. In this paper, we introduce a supervised approach for the delineation of urban areas using commonly available topographic data and commercial GIS software. The method uses a supervised parameter optimization approach along with buffer-based quality measuring method. The approach was developed, tested and evaluated in terms of possible usage in monitoring built-up areas in spatial science at a very fine-grained level. Results show that built-up area boundaries can be delineated automatically with higher quality compared to the settlement boundaries actually used. The approach has been applied to 166 settlement bodies in Germany. The study shows a very efficient way of extracting settlement boundaries from topographic data and maps and contributes to the quantification and monitoring of urban sprawl. Moreover, the findings from this study can potentially guide policy makers and urban planners from other countries.

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“…Thus, in addition to considering positional discrepancies of points along the compared lines, linear matching procedures can be usefully examined to assist in developing an integration assessment tool, using techniques of determining shape or curvature similarity between two compared lines. Buffering methods, and assessment of buffer overlay, have been popular techniques [29,30]. Buffers of variable size can be constructed around lines in each dataset (e.g., line X buffer XB, line Q buffer QB), within which statistical calculations can be carried out.…”

Section: Measuring Linear Geometric Accuracymentioning

confidence: 99%

Using Geometric Properties to Evaluate Possible Integration of Authoritative and Volunteered Geographic Information

Fairbairn

Al-Bakri

2013

IJGI

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Abstract:The assessment of data quality from different sources can be considered as a key challenge in supporting effective geospatial data integration and promoting collaboration in mapping projects. This paper presents a methodology for assessing positional and shape quality for authoritative large-scale data, such as Ordnance Survey (OS) UK data and General Directorate for Survey (GDS) Iraq data, and Volunteered Geographic Information (VGI), such as OpenStreetMap (OSM) data, with the intention of assessing possible integration. It is based on the measurement of discrepancies among the datasets, addressing positional accuracy and shape fidelity, using standard procedures and also directional statistics. Line feature comparison has been undertaken using buffering techniques and statistics, whilst shape metrics, including moments invariant, have been applied to assess polygon matching. The analyses are presented with a user-friendly interface which eases data input, computation and output of results, and assists in interpretation of the comparison. The results show that a comparison of positional and shape characteristics of OS data or GDS data, with those of OSM data, indicates that their integration for large scale mapping applications is not viable.

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An accuracy assessment method for geographical line data sets based on buffering

Cited by 107 publications

References 8 publications

Spatio-Semantic Comparison of Large 3d City Models in Citygml Using a Graph Database

Spatio-Semantic Comparison of Large 3d City Models in Citygml Using a Graph Database

A Supervised Approach to Delineate Built-Up Areas for Monitoring and Analysis of Settlements

Using Geometric Properties to Evaluate Possible Integration of Authoritative and Volunteered Geographic Information

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