Aug 202012
 

For those of you who do not know what Wikipedia is, the short version is that Wikipedia is “[..] a multilingualweb-basedfree-content encyclopedia project based on an openly editable model.” (Source: Wikipedia). This article is about relevant GIS/geography articles in Wikipedia related to Tanzania.

A version of this article was posted back in August 2007. Since then the body of literature on Tanzania in Wikipediahas continuously been growing. Both the English and the Swahili articles. The number of Swahili articles as of today number 24.126. The articles cover a wide number of themes, many of the not directly related to Tanzania.

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Aug 012012
 

In 2009 Brian Kuns with Stocholm University wrote a memo titled “Towards an Inventory of Historical Aerial Photos of Kenya, Tanzania and Uganda”. The memo represents a preliminary overview of archival resources containing historical aerial photographs of East Africa.

I have taken a look at the memo and in this article I will try to focus on any Tanzanian sources of data in most part using Kuns memo. I will also throw in some reflections of my own on historical aerial photographs and what lies ahead of us. Continue reading »

Feb 102012
 

In this posting I will try to give some advice about how to choose the right spatial data sources. I will focus on legal issues. As you will see the conclusion will have to be one based on more than one factor.

As far as I know very few people, if at all anyone, have been imprisoned for breach of copyrights pertaining to spatial data. We have often heard about how sharing digital movies may lead to high fines and imprisonment. Even linking to copyrighted material might lead you into such problems. Continue reading »

Feb 082012
 

On the former webpages of TZGISUG we availed a host of data from different sources. Among others were data on protected areas, infrastructure, demography, biological diversity, digital elevation models, Quarter Degree Grid Cells and more. Is this something we should continue doing, or is this a job better done by the actual owners of the data?

Professionally I would say that the owners of any data sets, spatial or not, should provide their data with the associated meta data, be it ISO/TC211, ISO 19139 or other. Only by being provided by their rightfull owners will we know that the data has not been tampered with or otherwise doctored in any unfashionable manner.

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