Visiona Soluções Geográficas

Visiona Soluções Geográficas is a satellite-based change-detection service from Visiona Tecnologia Espacial, the Brazilian space company set up as a joint venture of Embraer Defense & Security and Telebras. It is sold in two editions, one for municipalities and one for the energy sector, for organisations that must watch large areas for unplanned or unauthorised change and prefer to receive simple, direct findings rather than raw imagery.

The service analyses satellite imagery from Visiona's multi-constellation portfolio, with different spatial resolutions and high revisit rates, and points out the places where changes were detected. Three native detection classes are available: new buildings, vegetation suppression and exposed soil; further classes are available on request. Customers receive alerts whenever relevant changes are found, and results are delivered through Visiona's WebVis web platform, which can be integrated with mainstream GIS tools.

• Municipalities: identifying new construction, overseeing landfills and dumps, detecting environmental infractions such as vegetation clearing in permanent preservation areas and conservation units, and monitoring unplanned urban growth, clandestine neighbourhoods and land-use change.
• Energy: new construction and change along reservoir margins, transmission-line rights-of-way and around distribution substations; vegetation suppression; erosion spots and sediment deposition at reservoirs; macrophyte and grass mapping; reservoir water-line movement; fire alerts; and support for managing meter records on the distribution network.

For changes the standard classes do not cover, Visiona offers custom projects by its remote-sensing and GIS specialists.