Following my thoughts about being mapless in Gaza, I wanted to follow up on the work of UNITAR-UNOSAT, who have made the leap from the more basic satellite images that they used to provide, and are now regularly providing damage assessments. Their analysis of postwar damage in Georgia was very interesting1 and now they’re producing similar damage assessments over Gaza, with a commitment to update as often as they get new images.
I mentioned the .kmz file that Stefan at Ogle Earth has been putting together, which includes the UNOSAT layer. Stefan also lamented the fact that – while they provide frequent updates and quality outputs – UNOSAT products are only provided in PDF format.
And yet, the result, always, is a PDF map, which is great for printing out but not any good for any other kind of use. In some cases, the PDFs are locked against everything but printing, which means taking screenshots in order to rasterize them for placement in Google Earth… Given the global scope of these maps, their timeliness and usefulness, wouldn’t it be great if these were automatically published as KML to the Global Awareness default layer in Google Earth? People wouldn’t even need to go look for maps when they zoom in on a region hit by an emergency.
Well, I’ll agree with Stefan up to a point. PDF files are useful for nothing except printing – but most of UNOSAT’s potential users only want to print them , and playing around with the data is the last thing on their minds. However the good news is that it looks like they’re already starting – the damage assesssment data is also available as a geodatabase file and as a .kmz file. Einar has been circulating these versions to people working on the response, but has reservations on two grounds.
- The first is regarding the added value of releasing the data more widely – what is it, exactly? My response is that to fulfill their mission as effectively as possible, UNOSAT should be producing multiple formats and distributing across various distribution channels – and a side effect of this will be an increase the possibility of useful and interesting applications emerging. We can’t predict what they might be – and they might not even appear – but the whole neogeography field is based around innovation – it just needs the data to enable it.
- The second concern is more difficult to address – the question of whether the data will be misinterpreted or misused. This data will never be 100% accurate, which can lead to criticism of the agency publishing it if people don’t understand that. There’s also a slim chance that the data might be abused – for example, to misrepresent the situation on the ground – although the chances of this seem very small. My response to these problems is that people are free to criticise on the basis of the PDF file already, and releasing the data is unlikely to increase the type or frequency of criticism. We faced this all the time in the Humanitarian Information Centres – people would come in waving a printout and saying “Your maps are wrong!”, to which charge we would patiently explain that all maps are wrong, and would they like to help us improve?
To some extent Open Street Map have already started to deal with these issues using their existing community mechanisms, but UNOSAT is different – it’s a formal organisation in a large bureaucracy without the mandate or means to deal with public enquiries like this. Perhaps the best approach would be a tag-team of UNOSAT and OSM – sharing data as widely as possible, with UNOSAT the corporate source and OSM the buffer to address these issues as they arise?
- Although under-utilized on the ground – that’s the next obstacle we have to overcome, guys! [↩]
