Another Take on Climate Change, Part VI (the last)

2024 update: 'They will flip': Earth's poles are shifting and it is not a good sign for life on our planet 

I previously asked  how current vagaries of climate may relate to earth's magnetic field reversals? One problem was that geological records (ocean bottom magnetic stripes) didn't span well into historic records (volcanic lava deposits)! Well this appears to have been addressed in this video:

Another Take on Climate Change, Part V

[Update: Part VI, more on geomagnetic reversals]

Parts I, II, III & IV from March 2011 became relevant in a comment yesterday on Euan Mearns post on extreme climate. He pointed to the Laschamp event, and suggests this: that the wandering of the North Pole heralds a impending magnetic reversal, such as happened 4000 years ago evidenced in the French Massif Central near Clermont Ferrand.

Web Maps on Steroids, Part II

I showed a couple of months ago ways to post mega-datasets online without choking the system. This month OSGeoUK gave me the opportunity to present the same on PostGIS Day 2014, as postGIS was the backbone of two of these examples on GIScloud and GeoCloud2. Thanks to OSGeoUK and British Computer Society for hosting this.

Web maps on steroids

The last 6 blog posts over the last 3 months chronicled the use of dynamic maps using time attribute - years for historic ship tracks and wind data from same 150-350 yrs ago - not to animate maps but to filter them by decade and manage data fetches on ArcGIS Online. A parallel series of posts showed mega data sets on Amazon Web Services, as Mapcentia assured me postGIS handled giga datasets...

Global Sailings (1662 - 1856, English, Spanish, Dutch, French) revisited

[Update: climate data (wind speed & direction) have now been added in short & long posts]

I originally extracted CLIWOC (CLImatological database for the World's OCeans) ship captains' logs ships locations over a decade ago, to demonstrate the processing of 250K+ points in ArcGIS desktop using then new File Geodatabase. Five years later I posted this on my old website with instructions how to use it in  old ArcGIS Explorer and KML, and then I put a layer package on arcgis.com - both related historic details like de laPerouse's demise below, the importance of data standards and metadata, and the interst it generated elsewhere - more recently I posted a time-based variation of same, where using a time slider helps clarifiy complex data on desktop GIS.

Even more temporal maps

I posted here my webmaps from the East Anglia Medieval Fenlands project. I have now posted these on arcgis.com for use in ESRI maps: Watch future posts on time-enabling this project, and adding geo-processing to further examine these derived data. Note also that ArcGIS is available for personal use an research for $100 worldwide now.

More temporal web maps

Here is last year's Fenlands mashup on 2nd gen. beta GisCloud.com (this data is also posted on the UK academic ShareGeo site and the data.gov.uk apps site):

Critical mass, satellite imagery and GIS

Satellite imagery has been around for almost as long as GIS, and the following may just make them so easy they finally gain momentum. The same way Jeeps and Suburbans had been around for a couple of generations, but only the last generation saw Ford legitimize SUVs with its Explorer.

Meanwhile, back at the ranch...

Time for reflection coming up to the anniversary of reconnecting with my current business partner David Lloyd to help oilelefant to market.

Webmaps, history, climate and geology

Chatting with local history buffs brought up amazing facts about climate change and sea level rise since the Middle Ages in East Anglia. One book's sketch map relates how the North Sea coastline differed from today, and how that affected Anglo-Saxon socio-economics there before and after the Norman conquest and the Domesday book.