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Modeling, Designing and Developing a Multidisciplinary Geodatabase GIS with the physical Implementation of RDBMS in conjunction with CAD and different GIS applications for the development of Coastal/Marine Environment

Wednesday, 28 September, 2005 - 16:00
Campus: Brussels Humanities, Sciences & Engineering campus
Faculty: Science and Bio-engineering Sciences
E
0.04
Tesfazghi Ghebre Egziabeher
phd defence

The prime significance of Geographic Information System as a
multidisciplinary data integrating, analyzing and visualizing tool depends
on the organization of data encompassed within the system. This notion
calls for the indispensability of structuring diverse raw data with the
intention to establish a functional and robust Geodatabase model that
safeguard the consistency and integrities of spatial information
management.


This research work deals with the process of Georelational GIS data
modeling, designing and implementation of a wide spectrum coastalmarine
measurement data.


To let the research task set in motion; raw coastal related issues have
been discussed under the perspective of Coastal Zone Environment. GIS
building block entities were selected. Their conceptual interrelationships
have been diagrammatically illustrated. SQL's DDL applied to execute the
physical creation, determine dimension, storage and constraints of the
entities in an ODBC compliant RDBMS. Likewise, GIS geographic elements
were produced applying spatial programs and their integration with
attribute database led to the hatching of the object relational GIS.


Topologic operations pertaining to gap detection, segmentation, removal
of redundant geographic elements was performed using topology clean up
spatial and editing tools.


Georeferencing of the coastal maps have been performed using a provided
ellipsoid and datum (PSAD56) of a case study area (Guayaquil estuary,
Ecuador).


Interoperability tests among variety GIS applications show featuretransfer-
related lose of spatial features properties but successful
regeneration of spatial pointers. The process shows the possibility of
producing or transforming a functional spatial database from a specific
GIS application into another one.


Generating object-relational and spatio-temporal queries related to the
developed GIS objects resulted in disclosing thematically visualisable
spatial maps. The output of the spatial analysis enables us to perform
possible spatial correlation of multidisciplinar