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I have posted my notes from all the sessions I attended at the last week’sCloud Computing Expo 2008 on:
(By the way, I have just updated all three posts and added links to the session slides!)
Now it is time to share a few general comments on the conference. [...]
I april 2008 åbnede det nye Hjørring Bibliotek i centrum af byen. Firmaet Bosch & Fjord har stået for indretningen, hvilket har vakt vild begejstring i ind- og udland. Sågar et TV-hold har rejst helt fra Singapore for at se indretningen.
Jeg har i den forbindelse lavet endnu et eksempel på, at kort kan bruges til at formidle. Via Google Earth (KML fil her) kan et stort billede (4294×2863 pixels) fra det nyindrettet Hjørring Bibliotek betragtes. Når du åbner KML filen, så flyver du hen til biblioteket. [...]
Of course, from a technical standpoint, Deep Zoom is just commoditizing what Google Maps made possible years ago in pure script so there wasn’t really a reason why this couldn’t be done, except smoother transitions and zooming but that’s pretty tenuous. [...]
Color is the sensation that is invoked when light of wavelengths between 360nm and 720nm hits our eyes and then is processed by our visual system . Our eyes feature three types of color receptors, each maximally receptive to long, medium, and short wavelengths of light. These are known as L-, M- and S-cones. As it can be seen in Figure 1, a light with a wavelength of 530nm triggers the M-cones most, the L-cones slightly less and the S-cones just a little. The perceived color impression would then be a green.
Fig. 1: Color perception is achieved through three cone types (after ).
On computer screens colors are defined through the RGB color model (R stands for red, G for green and B for blue). These three colors are called primary colors and correspond to the wavelengths the L-, M- and S-cone are most receptive for. Primary colors cannot be generated by mixing other colors. Instead, by mixing primary colors, all other colors can be generated. Each pixel on a screen shows a color generated by the interplay of one red, one blue and one green light source that are so close to each other that they cannot be distinguished. [...]
The idea here is pretty simple - instead of using the out of the box tasks and the REST API, I create my own "tasks" (not real "tasks" in the ESRI parlance - just classes which request and process data) that make calls back to a custom service that does what I want, how I want it.
We've done this a number of ways... in all cases we write custom code in one or more "worker classes" that live in a standard class library assembly. Depending on the requirements, these worker classes can be designed to run on a SOC box (i.e. they make direct ArcObjects calls w/o ServerContext.CreateObject), they can run on a web server (i.e. use ServerContext.CreateObject) or if it needs to scale out across a lot of SOC boxes, they can be packaged as Server Object Extensions. Regardless, at the core they are just a set of methods, and so we have another assembly with unit tests that ensures that these methods work as expected. [...]
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By now, you may have heard about the release of ESRI's ArcGIS API for Flex. Developers are already using it to build exciting new Web applications on top of ArcGIS Server.
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The Virtual Earth platform is a critical component of the Microsoft geospatial story, enabling public sector agencies to serve up data in a manner that allows users to better visualize it, understand it, and ultimately to act on it in a more timely fashion, while simultaneously cutting costs and delivering clear value to their constituencies.