Spatial and graph SIG meets

June 27th, 2014, Published in Articles: PositionIT


The Oracle Spatial and Graph Special Interest Group (SIG), which was started in January this year, recently held their second meeting at the Oracle head offices in Johannesburg. The SIG aims to create a spatial and graph support community for operational issues in Oracle implementations, and a space for sharing workflow insights, best practices and other advice. AfriGIS’ Laurette Coetzee, the SIG leader, opened the meeting with news of the opening of another branch of the SIG at Oracle’s Cape Town offices on 4 July. The SIG is open to anyone interested, and has an annual membership fee of R300 which is used for resources at the meetings.


Left to right: Susan Naude, Craig Gers, Laurette Coetzee, Michelle Joubert, and Vanessa Daniell.

Susan Naude from GeoSpace presented a technical talk on “Geometry validation and Fixing”. Naude drew from solutions of her past projects to explain when and how spatial data can be validated and fixed. Fixes are usually needed because of data containing arcs, or because line-based instead of polygon data was imported, or because of digitising errors. Fixes included changing SDO values to fix digital points, removing arcs, and using the “migrate to current” and “remove vertical vertices” functions in Oracle. Naude also showed how to validate data with layer- and geometry, fixing data manually and automatically.

Andre Lubbe from Optron discussed “Using Optron and Trimble Field Inspector for better service delivery,” in which he used five case studies to illustrate how data can be captured into an Oracle database in as clean a way as possible using different form and workflow setups for different projects. Craig Gers from Giscoe did a demo of the open source web-based mapmaking platform MapGuide and its Oracle plugins, which offer an alternative way to represent data. During the demo, he illustrated useful tools and how they can be applied to data representation.

An Oracle Spatial 12c Technical Workshop is scheduled to takes place from 8-10 July 2014 in Johannesburg, and will cover features of Oracle Spatial and Mapviewer in lectures, demonstrations and hands-on exercises.

Contact Michelle Joubert, SAOUG, Tel 012 654- 2913,

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