Check out our paper in the march issue of the french GIS newsletter "SIG La Lettre" on the geospatial legacy of the Olympic Games in London. It summarrizes a research our team did for 4 years trying to analyse the most interesting geospatial aspects of this gigantic project and to take a few lessons we could apply to our daily Defense & Intelligence and Oil & Gas activities.
PECORA18, organized by ASPRS, is focused this year on "40 years of Earth Observation - Understanding in a Changing World".
The Conference is held in Herndon Virginia from November 14th to 17th, 2011.
Our paper "Definition of an Alarm System to Assess the Obsolescence of African Spatial Data Infrastructures" was selected by the organizers of the PECORA18 Conference.
Reasons for obsolescence of spatial data infrastructures (SDI) have changed drastically over the past few years. Classical reasons were linked to the evolution of landscapes (natural or man made) and eventually to technological breakthroughs (new sources, new production techniques, new distribution methods). Products and services being proposed by official legitimate organisations, decisions on obsolescence rules (leading to updates or new products) were based on consensual rules. Now, thoses rules still apply but at a different pace, especially in developing countries where urban growth and changing landscapes face rhythms seldomly seen in developed countries. It is also true for sources and technologies which change faster.
But now, for SDI stakeholders, new issues threaten the perceived value of their infrastructure. First, geospatial products and services are more and more used for different uses than their original intended use. Second, new actors (both from the commercial side and from the crowdsourcing side) present both opportunities and threats. How to explain that it takes you two or more years to build a dedicated infrastructure while in the mean time Google will have changed three times the VHR coverage over the same area? How to face criticism on your products based on the fact that as soon as you deliver them, users can check them against crowd sourced photos, videos, GPS tracks, or Open Street Maps productions…?
Even if strong arguments push to defend the need to build and maintain spatial data infrastructures, new sources, methods and organizations must be used to identify, assess and process obsolescence as soon as possible.
The availability of global satellite coverages and crowd sourced data, integrated in a warning system, allow the stakeholder to be the first to anticipate the future obsolescence of his infrastructure. It also allows to initiate the right communication with end users on perceived obsolescences.
We will present the system defined for defense and oil & gas stakeholders to assess possible obsolescence of their SDI in Africa. It is based on multiple alert systems on operational requirements, change detection on the field, availability of sources to update the data and competition from other products or services. Those alerts held to build a dynamic cartography integrated in a quaterly dashboard reporting.
For its 50th Birthday, the French Space Agency (Centre National d'Etudes Spatiales - CNES) published a commemorative book illustrating space through 101 topics.
Named in french "C'est l'espace ! 101 savoirs, histoires et curiosités" (This is Space! 101 knowledges, stories and curiosities), this large book is published by the renowned Gallimard publishing company.
Amongst 101 scientists, scholars and artists selected to contribute on one of the topics, Thierry Rousselin was in charge of the book's "Surveillance" topic.
A perfect Christmas gift available in french bookstores or through Amazon