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JMap is an online technology, so it is best
demonstrated through real-life demos. The demos that we propose on
this Web site either come from public sites or were inspired of real
applications using JMap.
All JMap demos are full-scale applications that
access a JMapServer. Typically, our demos do not necessitate any specific
installation in your own environment. However, you should be aware
of a number of items. Before you start with an online demo, we
recommend that your read the lines that follow.
JMap demos come either in Java form or HTML
form. Sometimes, both forms are deployed simultaneously for a single
demo, so you can chose the one that best fits your profile.
HTML-based JMap applications are server-centric
applications. Each time a request is done -- whether an object
selection, a change in style, a zoom or a pan on the display -- a
request is sent to the server. The server computes the new rendering
and sends a new image back to the user. By the way, this is the way
the vast majority of online mapping solutions work.
Java-based JMap applications are client-centric
applications. In this model, graphical objects are loaded in the
client environment and the user benefits from a great level of
interaction with the display, with minimal request to the server.
Both the HTML and Java versions of these demos have been
tested to run in the following environments:
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IE
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Netscape
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Mozilla
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Opera
The JMap java demos that we propose on this
site are signed applets. Signing an applet is a necessary
step when the client environment requires functions such as data
caching, printing, or clipboard copy. The first time you will
execute a demo, you will see a dialog prompt verifying that the
content actually comes from our Web site. You will be asked to
accept the demo. Once you have accepted the demo, the application
that runs on your computer is trusted as if it were resident.
Our JMap
applets will leave some data in the user environment. That data will
strictly be located in your user disk space, under the /.jmap
directory created in your home directory (typically "c:\documents
and settings\<username>" when using
Windows).
If you do not wish to accept any trusted
applet, you can limit your choice of demos to HTML-based
applications.
This site currently contains one demo, open to
anonymous and signed users: The
Montreal Urban Area. Go the the Demo
Page...
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