kml basics chpt 1 overview
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TRANSCRIPT
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Keyhole Modeling LanguageChpt. 1 – A Quick Tour
Mr. Thomas Cooper
Outdoor Technology
The Walker School
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Geographical Information Systems
Captures, stores, analyzes, manages, and presents data that is linked to location
Allow users to create interactive queries, analyze spatial information, edit data, maps, and present the results of all these operations
Location may be annotated by x, y, and z coordinates of longitude, latitude, and elevation
Real world objects are divided into two abstractions: discrete objects (a house) and continuous fields (rain fall amount or elevation).
Additional non-spatial data can also be stored along with the spatial data.
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Google Earth Program Window
Search Panel
Places Panel
Layers Panel
Tool Bars
Navigation Tools
Zoom Tools
Coordinates, Elevation
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Downloading Google Earth
http://earth.google.com/
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Completing Searches
Addresses (Zip Codes) Business Names Monuments and Parks
(objects) Coordinates (GPS Data)
Networked Learning 2009
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Creating Folders to Store Searches
Go to the “Places” folder
Right-click on “My Places” icon
Add >> Folder
Networked Learning 2009
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Saving Searches Click and drag found
places into the folder you created
Make sure the folder is checked.
Collapse the folder Highlight the folder by
clicking on it. Go to File >> Save
As >> Save Place As
Networked Learning 2009
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Working with Layers Over 206 layers in the
primary data base Major ones: roads, traffic,
weather, Wikipedia, National Geographic, and global awareness.
More on the Earth Outreach Community
Networked Learning 2009
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Basic Trouble Shooting
Reinstating Your Panels Loosing Terrain Data Reinstating Navigation Tools Reinstating the Status Bar Saving Content
Networked Learning 2009
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Creating Basic Placemarks
Topics:• Naming• Adding Text• Coordinates• Style and Color• Altitude• Editing• Saving
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Copy and Pasting
Allows you to view KML code of an object.
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Viewing Book Examples
Downloading Sample Pages:http://www.informit.com/store/product.aspx?isbn=9780321525598
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Hello Earth: First KML Program
<?xml version="1.0" encoding="utf-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Placemark>
<name>”Hello, Earth”</name> <description><Here's where we developed Google Earth></description>
<Point>
<coordinates>-122.084583,37.42227,0</coordinates>
</Point>
</Placemark>
</kml>
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Structure of KML File
Parent
Child Element
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Some Basic Rules
Case is significant Order is significant Child elements can only belong to
allowed parent elements
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Online KML Tutorials
http://code.google.com/apis/kml/documentation/kml_tut.html