Light pollution in South Africa: 2011 versus 2001

  This article outlines how artificial skyglow, also known as light pollution, is modelled using Census 2001 and Census 2011 population data. Light pollution is defined as “any adverse effect of artificial light including skyglow, glare, light trespass, light clutter, decreased visibility at night, and energy waste” [1]. This work, illustrated here, is a follow-up […]

Indoor mapping: beyond the front door

  GPS can take you to just about any front door – but indoor maps open a whole new world of possibilities by making indoor spaces accessible and by changing the way we interact with these spaces. The growth of geospatial data, along with the ease of access to it through smart devices (especially smart […]

3D modelling – seeing the full picture

  With the general public being exposed to 3D imagery on an ever increasing scale, it is not surprising that this has now become the standard for representing engineering data. With the imagery, simply being a representation of data stored within a formal database, extended use of this data has dramatically increased. The power to […]

Modeling the world’s deepest mine

  This article outlines the process of creating an accurate as-built 3D model of the Mponeng Mine in order to identify potential problem areas prior to the installation of a new conveyor, monorail, and chair-lift. Owned by Anglo Gold Ashanti and employing 6000 people, Mponeng Mine is part of the old Western Deep Levels Complex, […]

Moving window display for Landsat 8

  by Riaan Stegmann, SANSA Earth Observation Late last year SANSA Earth Observation became one of the first ground stations in the world to acquire a moving window display for Landsat 8. Landsat 8 images are used by the departments of agriculture, water affairs, environmental affairs, and rural development and land reform, as well as […]

Reviving pre-1994 historic address maps for Soweto

  by Nic Klopper, 1Map Spatial Solutions Sometimes radical out-of-the-box thinking is called for when faced with seemingly insurmountable problems. Reconstructing accurate address maps for Soweto – many years after they had been destroyed – was one such challenge. Utility companies were contracted by the City of Joburg to install and maintain utilities in Soweto. […]