XML DATA SCHEMAS AND SCALABLE VECTOR GRAPHICS FORMAT FOR THE SEA LEVEL OBSERVATIONS

Leonardas Marozas,Saulius Urbonas,Eimuntas Paršeliūnas

doi:10.3846/13921541.2007.9636725

Leonardas Marozas, Saulius Urbonas + Show 1 more

Open Access

https://doi.org/10.3846/13921541.2007.9636725

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Abstract

XML (Extended Markup Language) Data Schemas as the format for information exchange in graphical SVG (Scalable Vector Graphics) format is presented. SVG format is a language for two‐dimensional graphics and is based on XML. It is the advanced version of previous data exchange format TGX (Tide Gauge Independent Exchange Format), which contains the plain ASCII data. SVG graphics are formatted from sea level observations data at ESEAS station KLPD. Comparing with similar CGM (Computer Graphics Metafile) format, SVG has its advantages of being based on XML. XML Data Schemas, in addition, add a header information about the marine measurements site, sensors and any additional necessary information. The correct header formation and the advantages of such data exchange format are analysed. Header is important for an exchange between different sites from different countries so as it would be information standardisation. Visual appearance of the SVG file, the source, headers and formation of the file in script are described too.

Highlights

Data exchange for marine research sites is extremely important and valuable [1,2,3,4,5,6,7,8]
The main advantage of XML Data Schemas is their transformability which means that it can be transformed between XML based documents, complying to different schemas, ie we convert geographical data (GML) to 2D
While an external form is under development, the only way is to replace values by hand, but it will be finished with the current final version of this SVG implementation in XML Data Schemas

Summary

Introduction

Data exchange for marine research sites is extremely important and valuable [1,2,3,4,5,6,7,8]. At present TGX format (only ASCII data) is used for sea level observations data exchange [9,10]. Since CSV (comma separated values) or SDF (standard data format) format save place and as raw textual data can be exchanged, interpreted and imported graphical representation of data remains complicated. After TGX format was implemented, short step was the introduction of CGM format for marine data exchange [11]. Because of some disadvantages, the complete level ahead of TGX data is though currently under development, but already functioning SVG (Scalable Vector Graphics) file format with XML Data Schemas [12–15]

Structure of SVG file

Structure of XML Data Schemas

SVG file scripting

Conclusions

Literature