Archive for February, 2011
Images obtained from aerial photography, satellite imagery, and GIS 3D globe are all combined with the technology created by Keyhole Inc to make Google Earth work. This program was initially created by Keyhole Inc., which was later acquired by Google and rechristened as Google Earth in the year 2005. Google Earth Plus and Google Earth Pro are available with more features. If you have a personal computer which runs on Windows, Mac, or Linux you could use this Google Earth. By using this program you can view the streets, cars, and the houses up to 15 meters of resolution. The degree of resolution depends on the area which you are viewing. Some of the areas would have more resolution and you could view up to 15cm of resolution. Places in Las Vegas, Cambridge, and Nevada have such resolution.
For viewing some countries you can also search for address using Google Earth. You just use the mouse or enter the coordinates to see a location.
JSP (Java Server Pages) is a technology of the Java family that is used to create dynamic web pages. The scriptlets that are used in the JSP pages generate the content for the web page. The response page gets the HTML and the XML tags from the JSP pages. The JSP pages are compiled and the servlets are created. These servlets could call Enterprise JavaBeans and its components where the processing could occur in the server. The results of that processing are sent to the webpage. Many scalable web applications and critical web applications are done using JSP technology. There is not restriction on the platform or the web server if you want to use JSP pages. Servlets run in the server. It is easy to use JSP pages to create web pages that are dynamic. You could have a template which is common for the website and the dynamic content could come from the server through servlets.
Joomla is an open source content management system. It is free and comes with a lot of features that are needed to run a portal. Traditionally you would require a dedicated webmaster who is armed with design tools like Dreamweaver or FrontPage to work on a website. But if you use Joomla, a template is created by the developer. The administrator of that portal can designate certain parts of the website to an end user who can contribute content to that part alone. It is possible to give rights to a user to publish the content directly or get an approval from the administrator before the content is revealed published. Tools to change the look and feel of the website are available and the changes to the design can be made easily without change in the content. With Joomla the users need not know HTML and they need not know how to use tools like FrontPage and Dreamweaver.