Innovations in boundary mapping: Namibia, customary land and UAVs

XI Congresso Nazionale AIAr, 2021

During the second year of the project “A social and spatial investigation at the Moxomatsi village”- Joint Mobility Projects: New Technologies for Social Science, ISARP 2018-20 - the work team of the University of Salerno (Department of Civil Engineering and Department of Cultural Heritage Sciences) was engaged in South Africa for the documentation of the Bokoni Archaeological Complex. Located in the present province of Mpumalanga, the Bokoni was a pre-colonial South African society, the research will be mainly focused on the study of agricultural settlements characterized by areas where densely walled settlements with roughly circular homesteads linked by walled roads are interspersed among spreads of agricultural terraces. For the particular characteristics of the site, it was decided to acquire the images for the documentation with photogrammetric techniques using two different UAVs: a DJI Mavic 2 Pro and a DJI Phantom 4. The first one, was used to capture the aerial photogrammetric images for a generation of the 3D photogrammetric model of the area. Topographic information for the description of the site was extracted from the 3D model, in particular, from the nadiral orthophoto it was possible to identify and graph the archaeological areas with a greater presence of remains of the villages. On the same area, on the DJI Phantom 4, a Mapir Survey 2 NIR and the corresponding RGB camera were installed. In this way, it was possible to collect information also below the countryside, by extracting vegetative maps (calculating indices as NDVI or GNDVI). The last has contributed to delineate the presence of some archaeological remains even below the countryside level. The aerial photogrammetric processes, in addition, were combined with GNSS-type measurement techniques, measuring a network of 16 artificial targets (GCP) arranged over the entire surveyed area, and therefore the orthophotos and vegetative maps produced are all georeferenced.

2018

The products of aerial photogrammetry, such as, topographic map, DTM, etc., are usually acquired from very rigorous processes, expensive equipment, highly skilled personnel, longer period. This paper explores the application of Unmanned Aerial Vehicle (UAV) technology to solve the pitfalls associated with the traditional survey methods to generate improved terrestrial information, such as digital elevation models, orthophoto maps, etc. The UAV PHANTOM-4 equipped with a small format digital camera, Global Positioning System (GPS) and Inertial Navigation System (INS) was used to acquire digital aerial spatial information of part of University of Uyo Main Campus, in Akwa Ibom State, Nigeria. While HiTarget V30 GNSS RTK System was used to acquire ground control points (GCPs) within the area, and supported with Goggle Earth Imagery. The UAV data was processed with AGISOFT Photoscan Pro Software. The compared results from the generated ortho-rectified imagery with their corresponding RTK ...

International Research Journal of Engineering, IT and Scientific Research, 2022

The effective measurement and mapping of the land is the retrieval of accurate data according to position, in accordance with mapping provisions, and efficient in both cost and time. One way that data can be retrieved effectively and efficiently is by using a drone, commonly called an unmanned aerial vehicle (UAV). Drone is a vehicle equipped with a wave control system, precision navigation (Global Positioning System/GPS) and flight control electronics so that it is able to fly according to flight planning (autopilot). This drone makes it possible to track the position and orientation of sensors implemented in local or global coordinate systems. With the drone itself, it saves time because it can have an image of an area. Premark / Ground Control Point (GCP) is a point that is commonly used to improve measurement accuracy in mapping using drones, in this case using the Global Positioning System (GPS) Geodetic / RTK Hi Target tool. Mapping Using Drones was then used by many people, including for the purposes of villa spatial planning, so to support this activity a land boundary mapping was carried out at Villa Buccu, Kerobokan, Badung Bali. The boundary of the land which is limited by the adjacent building can be mapped quickly and concisely, thus saving time and effort in its implementation, the total area of the land is 4,235.2 m2 or 42,352 are.

The fusion of positional, navigational and imaging technologies and the ability to mount these on small unmanned aerial vehicles (UAVs) has opened up new opportunities for local mapping and monitoring in support of land administration. In this paper we describe a pilot test undertaken in Albania to develop a UAV-based approach for cadastral mapping to support land registration and improve the quality of existing geo-spatial data, particularly that of cadastral records. This work was funded through a World Bank innovation grant within the Europe and Central Asia (ECA) Region.

2017

The Technical Centre for Agricultural and Rural Cooperation (CTA) is a joint international institution of the African, Caribbean and Pacific (ACP) Group of States and the European Union (EU). Its mission is to advance food security, resilience and inclusive economic growth in Africa, the Caribbean and the Pacific through innovations in sustainable agriculture. CTA operates under the framework of the Cotonou Agreement and is funded by the EU. For more information on CTA, visit www.cta.int.

IPTEK Journal of Proceedings Series

. This information is useful for the preparation of land registry. In evaluating areas, 39 sampel accepted in area tolerance KL=±0,5√L. So, PIBT considered becomes a Land Parcels Map (PBT).

African Journal on Land Policy and Geospatial Sciences, 2021

The Unmanned Aerial vehicle (UAV), also known as drone, is a photogrammetric platform used as alternative solution to overcome the limits of traditional surveying methods. This study aims to analyze a small study area in Yaoundé, Cameroun using high resolution geospatial data of UAV and STDM for recording of land right in informal settlement. The study shows that, the high-resolution aerial images of UAV based on orthophotos can be used to solve problems related to land governance and the regularization of tenure rights through participatory boundary delineation and mapping approach. We noticed many problems related to the land ownership illustrated by contradictions between the municipal administration data and the results of our investigations. The CUY publishes that, out of 16.70% of the people with land certificates, 9% of the potential owners confirmed their rights, while the land map issued by the council is showing three. A well-established municipal housing estate would neve...

Environmental Science and Sustainable Development(ESSD), 2022

The Rivers State University campus in Portharcourt is one of the university campuses in the city of Portharcourt, Nigeria covering over 21 square kilometers and housing a variety of academic, residential, administrative and other support buildings. The University Campus has seen significant transformation in recent years, including the rehabilitation of old facilities, the construction of new academic facilities and the most recent update on the creation of new collages, faculties and departments. The current view of the transformations done within the University Campus is missing from several available maps of the university. Numerous facilities have been constructed on the University Campus that are not represented on these maps as well as the qualities associated with these facilities. Existing information on the various landscapes on the map is outdated and it needs to be streamlined in light of recent changes to the University's facilities and departments. This research article aims to demonstrate the effectiveness of unmanned aerial systems (UAS) in geospatial data collection for physical planning and mapping of infrastructures at the Rivers State University Port Harcourt campus by developing a UAS-based digital map and tour guide for RSU's main campus covering all collages, faculties and departments and this offers visitors, staff and students with location and attribute information within the campus. Methodologically, Unmanned Aerial Vehicles were deployed to obtain current visible images of the campus following the growth and increasing infrastructural development. At a flying height of 76.2m (250 ft), a DJI Phantom 4 Pro UAS equipped with a 20-megapixel visible camera was flown around the campus, generating imagery with 1.69cm spatial resolution per pixel. To obtain 3D modeling capabilities, visible imagery was acquired using the flight-planning software DroneDeploy with a near nadir angle and 75 percent front and side overlap. Vertical positions were linked to the World Geodetic System 1984 and horizontal positions to the 1984 World Geodetic Datum universal transverse Mercator (UTM) (WGS 84). To match the UAS data, GCPs were transformed to UTM zone 32 north. Finally, dense point clouds, DSM, and an orthomosaic which is a geometrically corrected aerial image that provides an accurate representation of an area and can be used to determine true distances, were among the UAS-derived deliverables.

2019

Amongst others, Unmanned Aerial Vehicles (UAVs) are emerging as a tool for alternative land tenure recording. The advent of low cost, reliable and lightweight UAVs has created new opportunities for collecting timely, tailored and high-quality geospatial information. Even though UAVs appear a promising technology, it is not clear to what extent it can contribute to existing land tenure recording workflows of communities and governments. To address these questions, field data collection was carried out in Rwanda in February 2019, which encompassed several UAV flights and the consultation of relevant stakeholders. Additionally, a participatory mapping pilot study was initiated to allow the comparison of the existing cadastral base data with the boundaries that were delineated on top of the plotted UAV orthophoto. Results revealed a clear discrepancy of the spatial location and extent of both parcel datasets and pinned the need to update the cadastre. It was found that especially in are...

This study uses a high resolution digital orthophoto derived from an Unmanned Aerial Vehicle (UAV) aerial photographs to update the landuse map of the Obafemi Awolowo University Campus while focusing on the built up environment. An aerial survey was conducted in the study area using commercially available low-cost Phantom II Vision Quadcopter. Sets of overlapping aerial photographs captured with optical camera on-board the UAV were used to produce 8 cm orthophoto. A digital copy of 1987 landuse paper map of the campus was obtained by heads-up digitizing, the digital map was then overlaid on the orthophoto from which new buildings and features were extracted and populated with relevant attributes. The updated landuse map of the Obafemi Awolowo University campus which was produced shows an addition of 187 building structures, with sizes ranging from small service centres to large administrative blocks. Most of the new buildings were built around the existing ones but there is gradual aggregation of structures at the eastern part of the campus. This may lead to increased pressure on some basic facilities such as congestion on roads leading to these areas during peak period. The study was able to show that the use of micro UAV is a cost effective way to derive high resolution spatial datasets which could be used for management and monitoring landuse changes and effective land planning in a small area such as a university campus.