Cadastral Parcel Boundary Extraction from UAV Images
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RESEARCH ARTICLE
Cadastral Parcel Boundary Extraction from UAV Images Ganesh Khadanga1
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Kamal Jain1
Received: 26 October 2020 / Accepted: 28 October 2020 Ó Indian Society of Remote Sensing 2020
Abstract Information extraction from unmanned aerial vehicle (UAV) images has progressed to a great extent. The focus for geospatial data sensing, representation, processing, visualization and information delineation has gradually shifted to UAV, because of its fast delivery with very high spatial resolution data. The users from various fields have started using the UAV data for potential field uses. The land records boundary information delineation is one such case where the UAV images are used for quick and accurate boundary extraction. The extracted boundary is further used as input for the geographical information system (GIS). The fast image acquisition also needs faster and automated information extraction for the technology to meet the societal need. After the image acquisition from the UAV image, the image is segmented using the mean-shift techniques. The best fit segmentation with minimum over and under-segmentation is taken up for automated boundary extraction. The segment boundary coordinates are extracted using the MATLAB image processing tools and represented in vector format using the Geospatial Data Abstraction Library tool. The extracted boundary is compared with the manually digitized boundary with the help of buffers around the reference data and the extracted data. The buffer of 2.0 m is taken up for the completeness, correctness and quality parameter assessment. The completeness, correctness and quality of the extraction are found to be 73.02%, 73.28% and 59.66%, respectively. Keywords UAV MATLAB Segmentation Cadastral parcel GIS
Introduction The UAVs have emerged as an alternative to high-resolution images for feature extraction purposes. The easy maneuverability, flying below the clouds, low cost and high spatial resolution are the key attracting features of UAVs popularity. The airspace restriction, small area coverage and need of a large number of batteries are the key disadvantages. Because of fast availability and easy operations, it has been used in various fields like archaeology, transport, forest, environment and various other departments. Recently, the revenue officials also started using the UAVs for cadastral mapping. Cadastral parcels depict the boundary of the land parcels, and
& Ganesh Khadanga [email protected] Kamal Jain [email protected] 1
Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
the ownership documents indicate details of ownership of the land. In most of the cases, the cadastral boundaries are extracted after the onscreen manual digitization process. Even the surveys are also conducted for the updation of the existing cadastral parcels and survey of the unsurveyed areas. The revenue and settlement department has been using the traditional methods of survey for surveying the land parcels. Recently, with the help National Land Records Moderniza
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