An Algorithm for Geo-Spatial Objects Adjustment
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Date
2015
Authors
Wadembere, Ismail
Ogao, Patrick
Journal Title
Journal ISSN
Volume Title
Publisher
Advances in Geomatics Research (
Abstract
GIS practitioners always integrate geo-spatial data from different sources using map-overlay operations in order to make
decisions and solve queries that deal with multiple layers. But they are always faced with openings and overlaps among
objects that form features in thematically same datasets resulting into slivers (unwanted small objects) and danglings
(unwanted intersections, polylines, and end points). Most GIS users end up running clean and build algorithms that just
remove unwanted objects but not achieving perfect merging originally intended with main reason being lack of geometrical
object based algorithm that can be used to update and adjust spatial objects to eliminate discrepancies caused by geometry
differences between features of thematically similar data. We present an algorithm for manipulating geometries of geospatial
objects that make up datasets basing on spatial points as the simplest geometrical primitive. Our approach makes it
possible to represent high level spatial geometrical shapes using points and allows for more comprehensive handling of all
shapes still maintaining the simplicity of working with the point primitive. Representation of spatial geometry shapes
comprising of spatial points, polylines, and polygons using spatial point primitive geometry is achieved by scanning all the
spatial dataset, observing the different geometry shapes and topology that exist, then representation all shapes using points
and primary attribute in form of text. The algorithm carries out shape transformation of objects so that all openings and
overlaps between objects making up dataset are eliminated so that geo-processing, modeling, and analysis utilize the
properly integrated datasets. The algorithm can be applied in spatial data management like geometrical alignment and
sharing environments like spatial data infrastructure.
Description
Keywords
Spatial points, Geometry representation, Object adjustment
Citation
Wadembere, I., & Ogao, P. An Algorithm for Geo-Spatial Objects Adjustment. Advances in Geomatics Research (