Abstract
Land administration constitutes the socio-technical systems that govern land tenure, use, value and development within a jurisdiction. The land parcel is the fundamental unit of analysis. Each parcel has identifiable boundaries, associated rights, and linked parties. Spatial information is fundamental. It represents the boundaries between land parcels and is embedded in cadastral sketches, plans, maps and databases. The boundaries are expressed in these records using mathematical or graphical descriptions. They are also expressed physically with monuments or natural features. Ideally, the recorded and physical expressions should align, however, in practice, this may not occur. This means some boundaries may be physically invisible, lacking accurate documentation, or potentially both. Emerging remote sensing tools and techniques offers great potential. Historically, the measurements used to produce recorded boundary representations were generated from ground-based surveying techniques. The approach was, and remains, entirely appropriate in many circumstances, although it can be timely, costly, and may only capture very limited contextual boundary information. Meanwhile, advances in remote sensing and photogrammetry offer improved measurement speeds, reduced costs, higher image resolutions, and enhanced sampling granularity. Applications of unmanned aerial vehicles (UAV), laser scanning, both airborne and terrestrial (LiDAR), radar interferometry, machine learning, and artificial intelligence techniques, all provide examples. Coupled with emergent societal challenges relating to poverty reduction, rapid urbanisation, vertical development, and complex infrastructure management, the contemporary motivation to use these new techniques is high. Fundamentally, they enable more rapid, cost-effective, and tailored approaches to 2D and 3D land data creation, analysis, and maintenance. This Special Issue hosts papers focusing on this intersection of emergent remote sensing tools and techniques, applied to domain of land administration.
Highlights
Land administration is the process of recording, securing, and disseminating information about land tenure, value, use, and development, within a jurisdiction [1]
The authors argue the method could be applied in other contexts and could significantly reduce the time and effort for land use monitoring and field surveying
For the case location of Kajiado, the results show that SmartSkeMa requires little expertise for immediate use, unmanned aerial vehicles (UAV) have high potential for creating up-to-date base maps, and automatic boundary extraction appears an effective method for demarcation of visible tenure boundaries, even compared to traditional methodologies and manual delineation
Summary
Land administration is the process of recording, securing, and disseminating information about land tenure, value, use, and development, within a jurisdiction [1]. The special issue presents: (i) comparisons of alternate remote sensing techniques for 2D and 3D data capture relevant to land administration (including UAV imagery, VHRSI, RADAR, LiDAR, and multi-spectral approaches); (ii) design and testing of techniques for 2D and 3D cadastral feature extraction from remotely-sensed data sources (including machine learning, pattern recognition, neural networks, semi-automated methods, algorithm design, and object-based approaches); (iii) modelling of data production workflows for scaled 2D and 3D cadastral production (including segmentation techniques, line extraction, contour generation, and pre/post-processing requirements); and (iv) observations from illustrative cases highlighting leading practices in data integration and utilization for 2D and 3D land administration (including both city, provincial, and national level examples).
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