In a classic paper Boggs (1949) appealed for an “atlas of ignorance”, an honest assessment of what we know we don’t know: This is the theme of this year's GBIF Challenge: Analysing and addressing gaps and biases in primary biodiversity data. "Gaps" can be gaps in geographic coverage, taxa group, or types of data. GBIF is looking for ways to access the nature of the gaps in the data it is aggregating from its network of contributors.

Steve Baskauf has concluded a thoughtful series of blog posts on RDF and biodiversity informatics with http://baskauf.blogspot.co.uk/2015/07/confessions-of-rdf-agnostic-part-7.html. In this post he discussed the "Rod Page Challenge", which was a series of grumpy posts I wrote (starting with this one) where I claimed RDF basically sucked, and to illustrate this I issued a challenge for people to do something interesting with some RDF I provided.

The six finalists for the GBIF Ebbe Nielsen Challenge have been announced by GBIF: The finalists all receive a €1,000 prize, and now have the possibility to refine their work and compete for the grand prize of €20,000 (€5000 for second place). As the rather cheesy quote above suggests, I think the challenge has been a success in terms of the interest generated, and the quality of the entrants.

The GBIF Ebbe Nielsen Challenge has closed and we have 23 submissions for the jury to evaluate. There's quite a range of project types (and media, including sound and physical objects), and it's going to be fascinating to evaluate all the entries (some of which are shown below). This is the first time GBIF has run this challenge, so it's gratifying to see so much creativity in response to the challenge.

The GBIF Ebbe Nielsen Challenge is open! From the official announcement First prize is €20,000, full details on prizes and entry requirements are on the Challenge web site.

BMC Ecology has published Alex Hardisty and Dave Roberts' white paper on biodiversity informatics: Here are their 12 recommendations (with some comments of my own): Open Data, should be normal practice and should embody the principles of being accessible, assessable, intelligible and usable.

In the spirit of the Would you give me a grant experiment? [1] here's the draft of a proposal I'm working on for the Computable Data Challenge. It's an attempt to merge taxonomic names, the primary literature, and phylogenetics into one all-singing, all-dancing website that makes it easy to browse names, see the publications relevant to those names, and see what, if anything, we know about the phylogeny of those taxa.

Now we are awash in challenges! EOL has announced its Computable Data Challenge: Some $US 50,000 is on offer. "Challenge" is perhaps a misnomer, as EOL is offering this money not as a prize at the end, but rather to fund one or more proposals (submitted by 22 May) that are accepted.

The Encyclopedia of Life have announced the EOL Phylogenetic Tree Challenge. The contest has two purposes: First prize is a trip to iEvoBio 2012, this year in Ottawa, Canada. For more details visit the challenge website. There is also an EOL community devoted to this challenge. Challenges are great things, especially ones with worthwhile tasks and decent prizes. EOL badly needs a phylogenetic perspective, so this is a welcome development.

Quick final comment on the TDWG Challenge - what is RDF good for?. As I noted in the previous post, Olivier Rovellotti (@orovellotti) and Javier de la Torre (@jatorre) have produced some nice visualisations of the frog data set: Nice as these are, I can't help feeling that they actually help make my point about the current state of RDF in biodiversity informatics.