VGI in Cadastre: a Greek experiment to investigate the potential of crowd sourcing techniques in Cadastral Mapping

Basiouka, Sofia; Potsiou, Chryssy

doi:10.1179/1752270611y.0000000037

Cited by 39 publications

(40 citation statements)

References 10 publications

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“…Encouraged by these examples, additional fields of application have been proposed. One of them is land administration (e.g., Basiouka & Potsiou, 2012;Keenja et al, 2012;McLaren, 2011). However, there is a fundamental difference between an encyclopaedia like WikiPedia and a subsystem of public administration: Errors in the encyclopaedia are annoying but can be corrected quite easily when detected.…”

Section: Introductionmentioning

confidence: 99%

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Vgi for Land Administration – A Quality Perspective

Navratil

Frank

2013

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Since the use of volunteered geographic information (VGI) or crowd sourced data (Goodchild, 2007) became more common, several people proposed the use of such methods of data collection for various fields. Success stories were Wikipedia encyclopaedia and OpenStreetMap (OSM), but also using VGI in land administration has been proposed. Robin McLaren proposed crowd sourcing as a way to get a new citizen collaboration model in land administration to enhance transparency and decrease costs (McLaren, 2011). Keenja et al. discussed the perception of VGI within the Dutch cadastre (Keenja, De Vries, Bennet, & Laarakker, 2012). Basiouka and Potsiou even discuss how crowd sourcing can be used to identify errors in the Hellenic cadastre (Basiouka & Potsiou, 2012). One problem of VGI is the quality control (compare Goodchild & Li, 2012). The problem with most data in a land administration system is that there is only a small group of people that can verify the correctness of information. The correct location of a boundary, for example, can only be assessed by the owners of the pieces of land touching at the boundary (and surveyors after investigation and measurement). How shall VGI then provide reliable data? Boundaries between areas of different use may be visible but land administration is often interested in ownership boundaries. In the paper we discuss the types of data used in land administration as discussed by Dale and McLaughlin (1999). These categories are then analyzed to identify the areas where VGI can actually provide reliable input. What we hope to learn from such an analysis is how to use the methodology of crowd sourcing for land administration, even if the data collection authoritatively.

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Section: Introductionmentioning

confidence: 99%

“…Keenja et al discussed the perception of VGI within the Dutch cadastre (Keenja, De Vries, Bennet, & Laarakker, 2012). Basiouka and Potsiou even discuss how crowd sourcing can be used to identify errors in the Hellenic cadastre (Basiouka & Potsiou, 2012). One problem of VGI is the quality control (compare Goodchild & Li, 2012).…”

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confidence: 99%

Vgi for Land Administration – A Quality Perspective

Navratil

Frank

2013

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…Some citizens speak of altruism, professional and personal interest, intellectual stimulation, protection of possible personal investment in the locality, social reward, personal reputation, self-expression, opportunity, and 'pride of place', including improvement in public services [15], as positive reasons for their engagement in VGI collection and management. Basiouka and Potsiou [16] suggest that the main motivation for public volunteering might be to overcome bureaucracy and assist in opening land up to more development. More negative factors can also act as drivers, including the promotion of mischief, support of a contrary social, economic, or political agenda, or malice intent (similar to hacking or seeking criminal access to data).…”

Section: Citizens' Motivationmentioning

confidence: 99%

“…Characteristic of many changing economies in less developed countries, public projects in revising, updating or maintaining any official system may fail due to political change and economic transition from central to free markets: 49% of World Bank supported projects suffer from budget deficiency, exemplified by a study of land administration by Basiouka and Potsiou [16] in Bulgaria. McLaren [4] noted that lack of trained staff also makes official systems inefficient, with Enemark et al [5] citing Rwanda as an example of this situation.…”

Section: Land Administration Systems In Developing Countriesmentioning

confidence: 99%

Experiences with Citizen-Sourced VGI in Challenging Circumstances

Hameed

Fairbairn

Speak

2017

IJGI

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Abstract:The article explores the process of Volunteered Geographic Information (VGI) collection by assessing the relative usability and accuracy of a range of different methods (smartphone GPS, tablet, and analogue maps) for data collection among different demographic and educational groups, and in different geographical contexts within a study area. Assessments are made of positional accuracy, completeness, and the experiences of citizen data collectors with reference to the official cadastral data and the land administration system. Ownership data were validated by crowd agreement. The outcomes of this research show the varying effects of volunteers, data collection method, geographical area, and application field, on geospatial data handling in the VGI arena. An overview of the many issues affecting the development and implementation of VGI projects is included. These are focused on the specific example of VGI data handling presented here: a case study area where instability and lack of resources are found alongside strong communities and a pressing need for more robust and effective official structures. The chosen example relates to the administration of land in an area of Iraq.

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“…Mapping -Existing Case Studies To date, there have been very few studies exploring the use of VGI in the context of cadastral systems, with (Basiouka and Potsiou, 2012) exploring the potential of VGI for cadastral mapping, and a follow-up paper (Basiouka and Potsiou, 2013) exploring citizen's motivations for participation. (Clouston, 2012) also explored this issue, noting that opinions ranges from "volunteers should know what they are doing" as there is an expectation that the information provided will improve the existing cadastre to "As long as the VGI data is flagged with key meta data about source, accuracy etc., then in all cases representation of all the cadastre is better than non representation".…”

Section: Use Of Vgi In Cadastralmentioning

confidence: 99%

Does Coimbra Need a 3d Cadastre? Prototyping a Crowdsourcing App As a First Step to Finding Out

Ellul

Almeida

Romano

2016

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

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ABSTRACT:The Municipality of Coimbra in Portugal, and indeed the country as a whole, is currently undergoing a long-term land registration (cadastre creation) exercise, with approximately 50% of the country having been surveyed, amounting to 1/3 of the total properties, by the end of 2013. The survey process is currently generating two-dimensional (2D) maps. However, as with many other countries, these maps have limitations when representing the real three-dimensional (3D) complexities of land and property ownership. Capturing 2D cadastre is an expensive process, and does not provide the required insight into the number of properties where the ownership situation is inadequately represented, as the survey does not include the internal building structure. Having information about the extent of the 2D/3D issue is, however, fundamental to making a decision as to whether to invest resources in even more expensive 3D survey. Given that the 3D complexity inside buildings is only known to residents/occupants -thus making crowd sourcing perhaps the only economically feasible approach for its capture -this paper describes the development of a web-based App envisaged for use by the general public to flag different land and property ownership situations. The paper focuses on two aspects of the problem -firstly, identifying an appropriate, clear, set of diagrams depicting the various different ownership situations from which the user can then pick one, and secondly prototyping and user testing an App for multi-platform VGI data capture in absence of direct feedback from the final end users -i.e. the general public.

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VGI in Cadastre: a Greek experiment to investigate the potential of crowd sourcing techniques in Cadastral Mapping

Cited by 39 publications

References 10 publications

Vgi for Land Administration – A Quality Perspective

Vgi for Land Administration – A Quality Perspective

Experiences with Citizen-Sourced VGI in Challenging Circumstances

Does Coimbra Need a 3d Cadastre? Prototyping a Crowdsourcing App As a First Step to Finding Out

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