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. […]

Large format printing solution for mining group

  by Jana van Vuuren, Azero Avenue The Anglo American Group of Mines’ survey and drafting offices faced printing production challenges such as large file sizes clogging networks, limited file support, inconsistent and non-standardised equipment, outdated equipment, and employees moving around within the company’s portfolio. A decision was made to standardise on HP’s large format […]

Satellite for early fire detection

by Robert Sanders, University of California As firefighters emerge from another record wildfire season in the Western United States, University of California, Berkeley, scientists believe it is time to give them a 21st century tool: a fire-spotting satellite. Such a satellite could view the Western states almost continuously, snapping pictures of the ground every few […]

Probabilistic graphical models for feature-based detection

by Wisdom Dlamini, Swaziland National Trust Commission This article describes the use of probabilistic graphical models, in particular Bayesian networks (BN), for the detection of four problem invasive alien plants, Chromolaena odorata, Eucalyptus grandis, Lantana camara, and Pinus patula from 8-band WorldView-2 satellite imagery acquired over two characteristically different sites in Swaziland. Download the PDF

Unleashing the power of imagery

by Stuart Martin, GeoTerraImage In the fields of satellite imagery and aerial photography, the geospatial community has a myriad of choice with respect to sensors, resolutions, revisit times and capabilities in terms of imagery. Within the community, the ability to extract information and knowledge from these images seems to be lagging behind as most applications […]

Drought monitoring

Information from the ARC-ISCW Recent drought conditions over the North West Province have revitalised interest in drought monitoring over South Africa. The Agricultural Research Council – Institute for Soil, Climate and Water (ARC-ISCW) monitors climate and vegetation responses operationally and provides near-real time products for the delineation of adversely affected areas. Please download the PDF