In summary, all products have changed a bit since their prior versions. The core changes:
PostGIS 1.5 has geodetic support now in the form of geography as well as some beefed up functions and additional distance functions like ST_ClosestPoint, ST_MaxDistance, ST_ShortestLine/LongestLine
SQL Server 2008 R2 basic spatial support hasn't changed much when compared to SQL Server 2008, but there is a lot more integration going on integrating Spatial into reporting services, Share Point and just integration
in general with SQL Server 2008 R2 and the Office 2010 stack.
Oracle 11G R2 - has finally offered an uninstall script for Locator folks who do not care to break the law by accidentally using functions only licensed in Oracle spatial,
but innocently exposed in Oracle Locator. If all that were not great enough, you are now allowed to legally do a centroid if you are using Oracle Locator. Doing unions, intersections, and differences is still a legal no no for Oracle Locator folks.
Oracle now provides Affine transform functions, which have long been provided by PostGIS and have been available via the MPL licensed CLR Spatial package of SQL Server 2008.
I still haven't figured out where this R2 convention started. I thought it was just a Microsoft thing, but I see Oracle follows the same convention as well.
PostGIS in Action book news
We are working on polishing off some suggestions in our last round of reviews and also incorporating changes from earlier reviews. We got perfect ratings in our last round. We also got two very rave blog reviews which we were pretty excited to read.
One from Bill Dollins A Look at "PostGIS in Action" and Mark Leslie PostGIS in Action.
It is always nice to know people appreciate your writing or even if they find flaws in it, have interest in it enough to comment about it. It makes all the effort worth while.
PostGIS in Action is available for Pre-Order on Amazon or Direct from Manning. The benefit of ordering direct from Manning
is that you get the e-Book draft copy now and updates as we revise the chapters. The benefit of ordering from Amazon is that you can lock in a lower price. The price of our book on Amazon has been slashed significantly to $33.74 USD
from its original $49.99 price with a pre-order price guarantee. I get a bit of a chuckle out of the fact that PostGIS in Action is ranked number 94 (at least for the moment) on Amazone in "Books > Computers & Internet > Hardware > Handheld & Mobile Devices"
along side all those iPad application and Android books. I didn't even think of that as a market that PostGIS/PostgreSQL compete heavily in.
Richard Broersma Jr.
I believe there is supposed to be a mobile release as soon as the book comes out in hardcopy. I think Manning has changed to have all their new releases available on mobile device format compatible with Kindle. I don't have a kindle, so not sure what that means. At any rate, with any e-Book or hard copy sale, they throw in the mobile version for free.