Keyhole Modeling LanguageChpt. 1 – A Quick Tour

Mr. Thomas Cooper

Outdoor Technology

The Walker School

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.

Google Earth Program Window

Search Panel

Places Panel

Layers Panel

Tool Bars

Navigation Tools

Zoom Tools

Coordinates, Elevation

Downloading Google Earth

http://earth.google.com/

Completing Searches

Addresses (Zip Codes) Business Names Monuments and Parks

(objects) Coordinates (GPS Data)

Networked Learning 2009

Creating Folders to Store Searches

Go to the “Places” folder

Right-click on “My Places” icon

Add >> Folder

Networked Learning 2009

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

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

Basic Trouble Shooting

Reinstating Your Panels Loosing Terrain Data Reinstating Navigation Tools Reinstating the Status Bar Saving Content

Networked Learning 2009

Creating Basic Placemarks

Topics:• Naming• Adding Text• Coordinates• Style and Color• Altitude• Editing• Saving

Copy and Pasting

Allows you to view KML code of an object.

Viewing Book Examples

Downloading Sample Pages:http://www.informit.com/store/product.aspx?isbn=9780321525598

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>

Structure of KML File

Parent

Child Element

Some Basic Rules

Case is significant Order is significant Child elements can only belong to

allowed parent elements

Online KML Tutorials

http://code.google.com/apis/kml/documentation/kml_tut.html