A procedure for semi-automated cadastral boundary feature extraction from high-resolution satellite imagery

YA Wassie, MN Koeva, RM Bennett… - Journal of spatial …, 2018 - Taylor & Francis
Journal of spatial science, 2018Taylor & Francis
Fit-for-purpose land administration aims to align cadastral policies, administration and
technology selection with the prevailing societal needs and capacity within a country
context. It seeks to support delivery of more rapid and low-cost cadastral boundary mapping–
and ultimately more widespread land tenure security. The philosophy suggests that when
high positional accuracies are not the primary concern, but when time pressure is, high-
resolution satellite images can serve as a source for creating cadastral boundary …
Abstract
Fit-for-purpose land administration aims to align cadastral policies, administration and technology selection with the prevailing societal needs and capacity within a country context. It seeks to support delivery of more rapid and low-cost cadastral boundary mapping – and ultimately more widespread land tenure security. The philosophy suggests that when high positional accuracies are not the primary concern, but when time pressure is, high-resolution satellite images can serve as a source for creating cadastral boundary information. This paper explores the potential of mean-shift segmentation plug-in in QGIS to semi-automatically extract cadastral boundaries in rural areas – based on the land cover information from WorldView-2 satellite images. The segmentation gives a vector file satisfying many cadastral boundary requirements and ready to be used in a GIS environment. The buffer overlay method was used to assess the quality of extracted boundaries. For a non-vegetated terrain having visible boundaries, the approach could be taken as an alternative to support existing, relatively slow, boundary mapping approaches by minimizing the effects of manual digitization and surveying.
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