Categories
GIS

BBC discovers Pictometry

click on pictometry

The BBC News IT show this week highlights some applications of pictometry imagery. You may not be able to play the video outside of the UK I’m afraid, but a great PR piece from Pictometry.

Interesting to see how imagery is used as an alternative to large scale topographic data where it is not available.. However.. there is massive as yet untapped potential for such imagery when it is combined with intelligent feature data, so that the user can find out what they are looking at without interpretation.

Written and submitted from home, using my home 802.11 network.

Categories
GIS opensource

OS NPE Maps online and copyright free(ish) !

Old MapAs Steve points out, Richard Fairhurst’s scanned database of OS New Popular Edition Maps on the 1930’s and 1940’s in now online at www.npemap.org.uk.

Although the mapping is now out of copyright, Richard is claiming copyright over the scans and is licensing the data using the Creative Commons Attribution-NonCommercial 2.5 license.

This is a fascinating collection which provides a unique view of England 50 years ago, an England without Motorways, Aerodromes with Grass runways, and with an Ordnance Survey which was firmly a military institution.

There is huge potential for this data to form the basis of many applications which don’t require either up to date or very accurate mapping, and it will very interesting to see what develops.. Already the mapping is forming part of a tool to collect an open source geocoded postcode database.

The groundswell of community generated mapping continues…

Written and submitted from home, using my home 802.11 network.

Categories
GIS

Spatial Analysis finds tranquillity

Todays press release by the Campaign to Protect Rural England (CPRE) has picked up a lot of coverage in the mainstream press, with this mornings Today programme discussing the potential findings with reference to the great romantic English poets – its all because of Wordsworth apparently, that we attempt to find Tranquillity.
Tranquillity

While I appreciate this sits well with the spin the CPRE would like to attach to this story (Well done the PR Dept !) it would be nice, just one in a while, if the press actually looked behind the map to find out how it was created.

Behind the map was a group of researchers from Northumbria and Newcastle Universities who used GIS techniques to weight a 500m pixel grid model of England, giving each pixel a value based on the weighted overlay of data layers representing amongst others;
• Land Cover
• Proximity of rivers, streams, lakes and the sea;
• Presence of birds and other wildlife;
• Proximity to transport links
• Proximity to urban settlements
• Population density
• Presence of visually intrustive features such as pylons and wind turbines etc.

This is a really interesting study, and yes I’m sure one could pick holes in the methodolgy used, but the team need to be congratulated on making such an impact with their work – its just a shame that in this case, the media as is often the case, runs away from the science behind the map.

Written and submitted from home, using my home 802.11 network.

Categories
GIS Thoughts

A VerySpatial Podcast – Episode 66

This week I was interviewed by the guys at Very Spatial for their weekly podcast. Very SpatialDespite a few Skype problems, no doubt down to student enduced network issues, all worked in the end. To listen to this podcast or to subscribe to Very Spatial, follow this link. It’s well worth having a look through the archive of shows, Jesse, Sue and Frank have managed to addess many of the key topics of GIS and Geography over the past year.

Written and submitted from home, using my home 802.11 network.

Categories
GIS

GeoDRM causes ‘heated debate’ on Geowanking list

The subject of GeoDRM something which OS like many other commercial data suppliers is very interested in developing has caused intense debate on the A Heated debateGeowanking mail list.

This comes as no surprise as the term has been damaged by the “heavyweight” tactics of the likes of Microsoft and Apple in relation to the music download industry and is seen by some even as “evil”.

In my mind the GeoDRM work we are supporting as this point is more about the creation of standards based ways of defining, expressing and distributing the rights to access geospatial data – recognising the point that both commercial and non-commercial users may want to manage how their content is used.

Yes of course at some point, some organisations will look to measures of actually physically restricting access to data based on particular rights, this a key element in establishing trust with the content owners. I am not going to argue that the fairplay system used by Apple is 100% right, it is better than many others, but without it there would be no iTunes store, and therefore a far smaller market for download music sales as the music industry would not have released their content!

Written and submitted from the CASA Basement Lecture Theatre at UCL, London, using my Vodafone 3G network card.

Categories
GIS Google Maps Thoughts

The other data in Mash-ups

With the UK mash-up day coming up at the end of the week, this blog post by J. LeRoy is very timely.

It reports on the response of the Fire Deptartment of Seattle to a google maps mash-up of 911 calls, the dept. has now removed the feed replacing it with a jpeg image. The dept. are not legally mandated to make the information available, but have removed the “machine readable” format version of the information citing “Homeland security concerns”

As Jim points out if they are worried about security they could just put a time delay in the feed as happens with flight progress reporting, this could otherwise set a worrying precedent for data providers !

There is continued debate about the geographical component to mash-ups and how “open” this geographic content is.. well the bigger issue I suggest, is all the other data one might want to map which is clearly not open at the moment.

Written and submitted from home, using my home 802.11 network.

Categories
GIS

Geospatial archiving – or how to backup 25,000 iPods

As is often the case the press have not quite got this story right, but pretty close.
Although it may not match the perception of “the man on the street”, OS is a data business, and over the past 5 years since I have been working here, the volumes of data we deal with have increased massively.

Not only in terms of new sources of digital imagery but also from increasing numbers of geospatial feature databases used in product development.

Data volumes today are over 500 Tb – that’s around 25,000 iPods !!

As a “National Mapping Agency” and as part of government there are additional responsibility’s in terms of maintaining an archive of the data throughout is lifetime and hence the need to develop strategies to archive large amounts of data.

UDO DiscWe have chosen to adopt UDO media, very high density optical media which can store 30GB per disk and which is far more resistant to environmental conditions than traditional magnetic media.

The bigger issue for us however is to make sure that the data is able to be used potentially in 50 years time which is guaranteed life of the media. Will we be able to read the data formats used (TIFF, SQL load files, CSV) in 2056 ? We have tried to select as open generic formats as possible but we need to document how the data is accessed as in the future we may need to be emulating the environments of today on some future computing platform.

There is an interesting precedent.. The BBC’s Domesday Project of 1986 based on a BBC model B micro and LV disc was rescued from its unreadable state by the National Archives a couple of years ago.

Written and submitted from the Holiday Inn Express Southampton, using my Vodafone 3G network card.

Categories
GPS Thoughts

Nuvi integrates ‘where’

I remember the first time I used Satellite Navigation (Satnav), it involved a copy of Auto-route on a pentium powered laptop, a serial cable, a Garmin GPS45 receiver and a lot gaffer (duct) tape – but it worked !!

In many ways today’s portable satnavs have not really changed the way they work much beyond what was available nearly ten years ago.. you enter a destination, the system uses a stored roads database to calculate the route to the destination and this is then iterated as you travel along the route. OK so today’s system may also use a online service or TMC receiver to update traffic data but in terms of the basic operation not a great deal has changed.

In the past I have often noted that in terms of LBS, the industry has ignored the point, that the most important part of “where” is not the absolute location in terms of a lat/long co-ordinate, but the fact that it provides context to other information. In terms of Satnav the same is also true.. are the designers of satnavs really making the most of the fact that they have locational context information always available ?

Garmin UK have been kind enough over the past couple of months to let me try out one of their Nuvi 360 satnav systems (thanks Claire) and I have been very impressed, that in a number of ways, Garmin is making use of locational context in the overall way the system works.

Firstly the Nuvi has a very neat security device, in addition to a 4-digit PIN code, the “security location” is a specific location that you must take you device to unlock it, if you forget the PIN code. e.g. you can only reset the PIN code if you take your device to this location – very smart.

Nuvi

The second use of locational context, is a safety feature which prevents the user from making system changes while the nuvi and the vehicle it is in – is moving!

There is still some way to go to increase the possible integration however, why not automatically change the zoom level with speed, decreasing scale as speed increases – if you are travelling on a motorway you don’t need to see all streets, likewise when travelling at less than 30mph, you are likely to be in a residential area and will need more detail.

There are other simple ways of making the system appear more intelligent to its user – list potential destinations ordered based on distance from the current location, default to home as the default destination if you are not at your home location, during the morning rush hour make “work” your default destination etc..

In terms of Satnav we are I would suggest just entering the mainstream market … there will be a whole bunch of potential customers out there for whom the current generation of systems is still to complex, even without the gaffer tape!

Written and submitted from home, using my home 802.11 network.

Categories
GIS Oracle Thoughts

Map Search.. How difficult can that be ?

Well actually, more complex than you might at first think… If you have bought a map online from Ordnance Survey in the past couple of weeks you will have used a redesigned store application that features a geographic search capability which recommends mapping products based on location.

mapsearch

This is actually a more difficult process than you might imagine, the search works across a range of OS and Partner products each of which are at different scales and which have different extents e.g they cover different areas, which often overlap.

There are two ways to search, one driven using a webmap (a simple ArcIMS WMS implementation) that provides a point to base the geographic search on, and a more sophisticated gazetteer search.

The gazetteer search is exciting in that is uses not just a list of placenames and points, but also place names and areas where appropriate classified by settlement and feature type.

For example enter “swindon’ into the search, and the system would retrieve ..

  • Swindon (Urban Region) – The area of the town
  • Swindon (Unitary Authority) – The larger area of the unitary authority
  • Swindon Swindon (Town) – A single point representing the centre of the town

As well as the villages Swindon in Gloucestershire, Staffordhire and the hamlets of Swindon in Northumberland and the Scottish Borders classified as such.

The user is then able to select the ‘Swindon” that is right for them, and then the really clever stuff happens..

A query is made to a Oracle Spatial database, overlaying either the point or polygon onto polygon extents of all the potential porducts and where there is an overlay geographically the products are selected.

Mapsearch how it works

The selected products are then ordered by the amount of coincidence between the area of search and the extent of the product, and these are then returned to the user. So in the example above product B would come before Product A as there is greater coincidence. ( yes I know the diagram looks bad in Internet Explorer – it’s a bug – use Firefox !!)

Like many innovations to the user this seems “no big deal”, but now you know different!! and we are actually using geographic information in a real business process , a case of actually doing as we say..

Written and submitted from the Holiday Inn Express Hotel, Poole, using my Vodafone 3G network card.

Categories
Apple Google Maps GPS

Location comes to iLife

iphoto GPSSo the mac hackers have been taking apart the latest release of iPhoto and have found details of potential GPS integration and closer ties with Google Maps.

MacTelChat reports that there are a number of hidden references in the package which suggest that photos may in the near future be organised by location and mapped using the google maps api.

The ability to extract GPS information available from a photo’s EXIF data is not new, and geo-tagging of photos has been made very popular by Flickr, but the intergration with google maps rather than mapquest as used in the past in the MacOS X addressbook is of greater interest ?

Then again the blogosphere loves to speculate about Apples future plans…

Written and submitted from home, using my home 802.11 network.