What is KML?What is KML?

Keyhole Markup LanguageKeyhole Markup Language Form of XML that is used in google earth Form of XML that is used in google earth

to mark points.to mark points. Can create camera anglesCan create camera angles Writes HTML descriptions of features and Writes HTML descriptions of features and

allows hyper-linking and image allows hyper-linking and image embedding embedding

http://www.keyhole.com/kml/http://www.keyhole.com/kml/kml_tut.htmlkml_tut.html

Different usesDifferent uses

►Can be used to form Can be used to form placemarksplacemarks

►Can be used to form ground Can be used to form ground overlaysoverlays

►Can be used to from Can be used to from paths/directions from one paths/directions from one location to another. location to another.

Placemark code examplePlacemark code example<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://earth.google.com/kml/2.0"> <kml xmlns="http://earth.google.com/kml/2.0"> <Placemark> <Placemark>

<description>Tethered to the ground by a customizable tail</description> <description>Tethered to the ground by a customizable tail</description> <name>Tethethed placemark</name> <name>Tethethed placemark</name> <LookAt> <LookAt>

<longitude>-122.0856375356631</longitude> <longitude>-122.0856375356631</longitude> <latitude>37.42240551227282</latitude> <latitude>37.42240551227282</latitude> <range>305.8880792294568</range> <range>305.8880792294568</range> <tilt>46.72425699662645</tilt> <tilt>46.72425699662645</tilt> <heading>49.06133439171233</heading> <heading>49.06133439171233</heading>

</LookAt> </LookAt> <visibility>0</visibility> <visibility>0</visibility>

<Style> <Style> <IconStyle> <IconStyle>

<Icon> <href>root://icons/palette-3.png</href> <Icon> <href>root://icons/palette-3.png</href> <x>96</x> <x>96</x> <y>160</y> <y>160</y> <w>32</w> <w>32</w> <h>32</h> <h>32</h> </Icon> </Icon>

</IconStyle> </IconStyle> </Style> </Style> <Point> <Point>

<extrude>1</extrude> <extrude>1</extrude> <altitudeMode>relativeToGround</altitudeMode> <altitudeMode>relativeToGround</altitudeMode> <coordinates>-122.0856204541786,37.42244015321688,50</coordinates> <coordinates>-122.0856204541786,37.42244015321688,50</coordinates>

</Point> </Point> </Placemark> </Placemark> </kml> </kml>

Example code for Ground Example code for Ground overlayoverlay

<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://earth.google.com/kml/2.0"> <kml xmlns="http://earth.google.com/kml/2.0">

<GroundOverlay> <GroundOverlay> <description>Overlay shows Mount Etna erupting on July 13th, 2001.</description> <description>Overlay shows Mount Etna erupting on July 13th, 2001.</description> <name>Large-scale overlay on terrain</name> <name>Large-scale overlay on terrain</name> <LookAt> <longitude>15.02468937557116</longitude> <LookAt> <longitude>15.02468937557116</longitude> <latitude>37.67395167941667</latitude> <latitude>37.67395167941667</latitude>

<range>30350.36838438907</range> <range>30350.36838438907</range> <tilt>58.31228652890705</tilt> <tilt>58.31228652890705</tilt> <heading>-16.5581842842829</heading> <heading>-16.5581842842829</heading>

</LookAt> <visibility>0</visibility> </LookAt> <visibility>0</visibility> <Icon> <href>http://bbs.keyhole.com/ubb/z0302a1700/etna.jpg</href> </Icon> <Icon> <href>http://bbs.keyhole.com/ubb/z0302a1700/etna.jpg</href> </Icon>

<LatLonBox id="khLatLonBox751"> <LatLonBox id="khLatLonBox751"> <north>37.91904192681665</north> <north>37.91904192681665</north> <south>37.46543388598137</south><south>37.46543388598137</south> <east>15.35832653742206</east><east>15.35832653742206</east><west>14.60128369746704</west> <west>14.60128369746704</west> <rotation>0</rotation> <rotation>0</rotation>

</LatLonBox> </LatLonBox> </GroundOverlay> </GroundOverlay>

</kml> </kml>

Allows descriptive HTML in Allows descriptive HTML in placemarksplacemarks

► <description> <description> <![CDATA[ <h1>CDATA Tags are <![CDATA[ <h1>CDATA Tags are

important!</h1> important!</h1> <p><font color="red">Text is <i>more <p><font color="red">Text is <i>more

readable</i> readable</i> and <b>easier to write</b> when and <b>easier to write</b> when you can avoid you can avoid using entity references.</font>using entity references.</font>

</p> ]]> </p> ]]> </description> </description>

► <description> <description> <h1>CDATA Tags are important!</h1> <h1>CDATA Tags are important!</h1> <p><font color="red">Text is <i>more readable</i> and <p><font color="red">Text is <i>more readable</i> and <b>easier to write</b> when you can avoid using entity <b>easier to write</b> when you can avoid using entity references.</font>references.</font></p> </p>

</description> </description>

ToolsTools

►One tool that can be used to create One tool that can be used to create your map is your map is mapbuildermapbuilder..

Getting the codeGetting the code

►Mapbuilder creates the code Mapbuilder creates the code for you.for you.

►Copy and paste it and save as Copy and paste it and save as html file timehtml file time

►Publish it to webspace.Publish it to webspace.

ExercisesExercises

1.1. Go to Go to www.mapbuilder.netwww.mapbuilder.net and and created a user account.created a user account.

2.2. Created at least 2 placemarks on Created at least 2 placemarks on your map. Make on of them your your map. Make on of them your current address and the other can be current address and the other can be whatever you want.whatever you want.