Application of the spatial database for shoreline change analysis and visualisation: example from the western Polish coast, southern Baltic Sea
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Date
2018-09
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WydziaĆ Nauk Geograficznych i Geologicznych Uniwersytetu im. Adama Mickiewicza
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Abstract
The main aim of the study was to introduce a spatial database application for the estimation of changes in
shoreline position. The open-source PostgreSQL database system with the PostGIS spatial extension was used as the
data store for digitalised shorelines. The solution to calculations of the shoreline changes was based on the functions
written in the PL/SQL language and geospatial functions provided by the PostGIS extension. The traditional baseline
and transects method was used to quantify the distances and rate of shoreline movement. Outputs of the calculations
were stored in the database table and simply visualised using graphical functions in the R software environment or in
GIS Desktop software. The advantage of presented method is the application of SQL language in the analysis of the
relation between the geometry of shorelines stored in the database table, which, compared to other similar solutions,
gives the user fully open, simple analytical code and enable selecting custom parameters of analysis, modifying code
and performing additional calculations.
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Keywords
shoreline change analysis, spatial database, open source GIS software, PostGIS, PostgreSQL
Citation
Quaestiones Geographicae vol. 37 (3), 2018, pp. 25-34