In a really perverse way, first impressions were not unlike the opening lines from Will Crowther's Colossal Cave Adventure game on the PDP-11. But rather than those impressions being this ...

You are standing at the end of a road before a small brick building. Around you is a forest. A small stream flows out of the building and down a gully.

.. my first impressions were this ...

You are standing in a gap between concrete buildings south of the equator. The sun beats down. Around you is a mass of similar buildings with corrugated iron roofs. A small stream flows in a gully between the buildings. The stream is made up of water and human waste. A river tries to flow nearby, but it's blocked by tons of rubbish and what water there is is black and bubbles noxiously. The smell is overpowering and overwhelming. People live here.

But this isn't a game and this place really exists. It's called Tandale and the polite way of referring to it is an unplanned development. Tandale is almost a city in its own right. It occupies a small area to the North West of Tanzania's largest city, Dar es Salaam. Tandale is an enclave, surrounded by the growing suburbs of Dar es Salaam. In 2002, a census showed there was a population of just over 45,000 people living here. Now, towards the end of 2012, the number must be much much higher.

There's a saying that travel broadens the mind. It's a cliche but cliches generally come about because they're true. This week my mind has been considerably broadened, visting the Tandale slum on the outskirts of Dar es Salaam and attending and judging the Sanitation Hackathon, but more about that in a later post.

The week started in Chicago, the Windy City, which lived up to its name, being cold, windy and with crystal clear skies. It's a classic example of the American style of high rise architecture and the view from one of the meeting rooms in Nokia's offices were spectacular.

If any industry sector is uniquely poised to benefit from the triumvirate of social, local and mobile, it's the classified listings industry. The last time I spoke about whether do embrace SoLoMo or just embrace social, local and mobile I cautioned against the tick in the box approach and against adopting new technologies just because you're exhorted to.

But at first glance, a business running classified listings does seem to put all the right ticks in all the right boxes.

Firstly local. Classifieds are inherently local, offering a way for local businesses and individuals to offer ... stuff ... to other local people. Implementing a local strategy needs your mainstay offering to have a strong geolocation quotient and what could be more local or more geolocation than addresses and postal codes?

Then there's mobile. Most classifieds businesses have either fully or partially transitioned from print to online and if you already have an online presence, you're more than half way to having a mobile online presence.

Finally there's social. Again, there's a strong affinity with classifieds. Nothing spreads faster than word of mouth reputation and harnessing the power of social media to allow people to say "hey, I just found this really cool stuff" is a compelling case for social.

So when the International Classified Media Association, the ICMA, asked me to talk about SoLoMo at their Social, Local, Mobile: Classified Media Strategies conference in Instanbul last week it was an ideal opportunity to see whether my preconceptions to be skeptical about SoLoMo were borne out in practise or whether I'd just overdone the cynicism a bit too much.

This is post number six in the ongoing #mapgasm series of posts on maps found on the interwebs that I like. Yes, it's another map. Yes, it's another Tube map. I make no apologies for this.

A simple map is often a good map. Cutting away cartographical clutter can reveal the heart of what a map is trying to show. But sometimes you can maybe take the map pruning just a little bit too far. Take the map of the London Underground; surely one of the simplest and more effective maps there is. Surely there's not much scope for making it any simpler?

I've said it before, many times, but I'm a 100% un-reconstructed map addict and make no apology for it. I've said this in posts I've written on this blog as well as using it as part of my introduction for talks at conferences. This post is a slightly more long winded version of why I am the map addict that I am.

I grew up in the suburbs of London. For as long as I can remember, every week day morning my father picked up his briefcase and walked to the local British Rail station (for this was way before the privatisation of the British rail network) and went to the fantastical place, to a child's mind at least, called Central London where he worked. He went there on a train. Which was amazing and wonderful to me at the time. I knew he worked in Central London because he had a book of maps of all the streets in Central London. It was old, dog-eared and probably out of date but it made the journey to and from work with him every day and I used to look at it in the evenings, after he'd come home for the day. This mystical and wondrous book was called the London A-Z. It looked something like this.

Warning. This post contains a sweeping generalisation. Yes, I know that Places are not just part of today's digital maps; see the James Fee and Tyler Bell hangout The One Where Tyler Bell Defines Big Data as a proof point. But for the sake of this post, just assume that Places and maps are synonymous.

It's never been easier to make a map. Correction. It's never been easier to contribute to a map. Today we seem to be makingcontributing to maps everywhere, even underground, or should I say Underground?

To makecontribute to a map, you used to have to be a professional map maker, with easy access to an arsenal of surveying or an industrial grade GPS.