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ดาวโหลด Create Google Earth Applications
ข้อมูลเพิ่มเติมเนื้อหา เป็นภาษาอังกฤษ ต้องมีความรู้ด้าน Access และ การใช้งานโปรแกรม Google Earth
Google Earth and Google Maps have provided
researchers and laypeople with ways to map any set of data quickly and easily. This tutorial covers the following
topics: 1) The benefits of displaying
data using Google Earth/Google Maps; 2) KML and the creation of placemarks in
Google Earth/Google Maps (GE/GM); 2) Using an Access database to create many
placemarks simultaneously; 3) Creating different styles of placemarks based on
the value of an attribute.
INTRODUCTION: THE BENEFITS OF DISPLAYING DATA USING GOOGLE
EARTH/GOOGLE MAPS
Recent developments have made possible the creation
of ‘mashups’ (web applications which include functions borrowed from other
web-based programs.) Google Earth and
Google Maps make it especially easy to use their sophisticated functions in
simple applications you can create from your own data.[1] With the creation of KML, or Keyhole Markup
Language, named after Keyhole, Inc., a software company founded in 2001 and
taken over by Google, it is now possible for developers to easily make
placemarks, polygons, paths, and other objects to be shown on Google
Earth/Maps.
The display of information directly on
representations of satellite maps (through GE/GM) conveys a number of distinct
benefits: 1) It allows the viewer to
understand the data more fully, because it is tied to geographic locations in
the viewer’s mind; 2) It can enable the viewer to use the data more
easily. For example, if the viewer sees
a placemark indicating a location of a building, he/she can more easily figure
out where that building actually is, and get there more easily. 3) It gives the viewer a more comprehensive
view about how the data presented relate to each other. For example, the viewer looking for a
placemark that indicates an organizational presence (say for a hobby club) in
one area can easily see that there are numerous other places nearby. 4) And, it can aid in decision support, due
to the properties discussed above.
Additionally, the placemark offers viewers a way to
selectively and quickly view information they need. For example, in the case of an organization,
they can easily access such facts as address, contact email, website, etc. Such information can be accessed by clicking
on the placemark or may be identifiable by differentiating the placemarks by
some property such as color or shape.
While placemarks may be created individually, it is
often useful to create many placemarks at a time, if a database with the
appropriate information is available, even if the information does not already
contain location information. Users can
subsequently add the location information using Google Earth/Map’s user
interface. This paper will serve as a
tutorial that explains how to use KML, XML, and XSL with an Access database to
create many placemarks simultaneously.
We begin by discussing KML.
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