Abstract
An Open Source Web-GIS platform for Geologic Voxel (Geo-Vox) modeling and visualization, has been developed. Geo-Vox provides a comprehensive framework by integrating GIS, relational database, open geospatial standards-compliant web mapping engine, 2-D and 3-D rendering libraries for geologic modeling. Free and Open Source Software for Geoinformatics (FOSS4G) stack comprising of GRASS GIS, PostgreSQL, MapServer, OpenLayers and three.js JavaScript 3-D library have been used to implement the system. Geo-Vox overcomes several limitations of solid modeling by construction of model based on an intuitive logical relation between geologic units and boundary surfaces. Two-dimensional visualization allows rendering of horizontal and vertical sections at user-defined planes. The voxel model can also be exported in a format amenable for rendering as 3-D solid model. Geo-Vox is unique, in that, (a) logics used to create the model are easily comprehensible to geologist (b) offers high degree of interoperability (c) leverages FOSS4G stack to implement a comprehensive geologic modeling tool that is hitherto unavailable. The functionality of Geo-Vox is demonstrated using data derived from published geologic map. The results confirm the potential of Geo-Vox to provide an interoperable and scalable framework for delivery of value-added geological information for a variety technical and societal needs.
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