I want to load a kml file every 10 seconds with google earth, I found this example http://ukhas.org.uk/code:kml_live_update but it seems it does not work.
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<NetworkLink>
<Link>
<href>every10.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>10</refreshInterval>
</Link>
</NetworkLink>
</Document>
</kml>
It does not load every10.kml, even I tried a kml file over internet (http://code.google.com/apis/kml/documentation/Point.kml )
The code you provided from the example is valid, but the link reference (href) is incorrect. You should try inserting a full URL, and it will work. Using the Point.kml file you provided, the working code should look like this:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<NetworkLink>
<Link>
<href>http://code.google.com/apis/kml/documentation/Point.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>10</refreshInterval>
</Link>
</NetworkLink>
</Document>
</kml>
First - it is working example.
You must specify full link to your kml file.
In my version GE this NetworkLink update every 10 sec. In your case, for refresh view (and new update kml), you may try to setup settings in Google Earth. On context menu on subelement of kml file (NetFolder icon), you may choose Refresh tab (maybe other name - i have language differen from English) and choose 10 sec interval.
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<NetworkLink>
<Link>
<href>every10.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>10</refreshInterval>
</Link>
</NetworkLink>
</kml>
Worked for me:
load.kml
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<NetworkLink>
<Link>
<href>C:\Users\loran\kml\every10.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>10</refreshInterval>
</Link>
</NetworkLink>
</Document>
</kml>
Just make sure you have a full path in your href
It is loading but doesn't zoom in where the point is so it looks like its not working. The real problem is loading point continuoulsy with zoom to that particular region
Related
Using the below format as starting point I would like to know how to solve the following problem. This is an example for a Root KML file that links to other KMLs. My problem is that people modifying sub1.kml might change the name from sub1.kml to sub1-05-OCT-16.kml or want to add another KML called sub1-a.kml. Once this occurs the network link is no longer valid. I can't link to a folder from what I have seen and I do not want o have to change this file everytime. Is there an esiaer solution I'm overlooking?
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<NetworkLink>
<name>NetworkLinked sub-item</name>
<Link>
<href> kml/sub1.kml </href>
</Link>
</NetworkLink>
<NetworkLink>
<name>NetworkLinked sub-item</name>
<Link>
<href> kml/sub2.kml </href>
</Link>
</NetworkLink>
</Document>
</kml>
A network link must point at a specific KML (or KMZ) file. Unfortunately there's no way to point it at a folder or directory and somehow get the list of files and pick out all the KML/KMZs. So you'll need to either make sure that the target file names stay the same, or update your NetworkLinks when they change.
I'm using this KML file (lets call it load.kml)
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<NetworkLink>
<refreshVisibility>1</refreshVisibility>
<flyToView>1</flyToView>
<Link> <href>C:\\Users\\bridenstinek\\workspace\\AlertServlet\\resources\\outboundKML\\test.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>20</refreshInterval>
</Link>
</NetworkLink>
</Document>
</kml>
To point Google Earth to a kml file (lets call it test.kml). When I load test.kml regularly (without using load.kml) the range I set works correctly (the zoom level is how I set it).
But when test.kml gets loaded using load.kml the range is incorrect. The placemark zooms in really far and ignores the range I set in the test.kml file.
Is there something overriding the range inside load.kml?
Example of test.kml:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:location="http://example.com">
<Document>
<name>Example</name>
<Style id="alertKMLStyle">
<BalloonStyle>
<text><![CDATA[<center>
<b><font color="#CC0000" size="+8">$[name]</font></b>
<br/></center><br/>
<font size="+2">$[description]</font>
<br/><br/>
]]></text>
</BalloonStyle>
</Style>
<Placemark>
<name>Example Name</name>
<description>Example Description</description>
<LookAt>
<location:coordinates>800</location:coordinates>
<longitude>2.294</longitude>
<latitude>48.858</latitude>
<altitude>0.5</altitude>
<heading>12.23742976490019</heading>
<tilt>0</tilt>
<range>115718.4889366544</range>
<gx:altitudeMode>relativeToSeaFloor</gx:altitudeMode>
</LookAt>
<styleUrl>#alertKMLStyle</styleUrl>
<gx:balloonVisibility>1</gx:balloonVisibility>
<Point>
<gx:drawOrder>1</gx:drawOrder>
<coordinates>2.294,48.858,0</coordinates>
</Point>
</Placemark>
</Document>
</kml>
There are a few undocumented differences when you load KML directly as opposed to via a NetworkLink.
When you load the KML via the NetworLink it looks for a LookAt or Camera in the outermost element which is the Document in test.kml file.
You can either 1) copy/move the <LookAt> from the Placemark to the parent Document element in test.kml or 2) copy the <LookAt> and insert into the NetworkLink in load.kml and make flyToView=0.
If the target KML has timestamps then the behavior via Networklinks is different then loading it directly. See related issue.
I am trying to update a kml file through the networkcontrollink with an update
The kml file i want to update is stored on the server is called initial_coord.kml.
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2">
<Document>
<Placemark id="pm123">
<name>point123</name>
<Point>
<coordinates>-95.44,40.42,0</coordinates>
</Point>
</Placemark>
<Placemark id="pm456">
<name>point456</name>
<Point>
<coordinates>-95.43,40.42,0</coordinates>
</Point>
</Placemark>
</Document>
</kml>
The kml file i load to update it is the following:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<NetworkLink>
<name>Update</name>
<Link>
<href>http://localhost/cgi-bin/testF/add_more_coords.py</href></Link>
</NetworkLink>
</kml>
And the python script i am calling is the following
#!/usr/bin/python
kml= (
'<?xml version="1.0" encoding="UTF-8"?>\n'
'<kml xmlns="http://www.opengis.net/kml/2.2">\n'
'<NetworkLinkControl>\n'
'<Update>\n'
'<targetHref>http://10.10.210.247/initial_coords.kml</targetHref>\n'
'<Change>\n'
'<Placemark targetId="pm123">\n'
'<name>Name changed by Update Change</name>\n'
'<!-- coordinates remain the same -->\n'
'</Placemark>\n'
'</Change>\n'
'</Update>\n'
'</NetworkLinkControl>\n'
'</kml>\n'
)
print 'Content-Type: application/vnd.google-earth.kml+xml\n'
print kml
The update does not work and i am wondering why because it is very similar to the google example
The NetworkLinkControl is strict regarding the target URL and you have localhost in the root KML and 10.10.210.247 in the python-generated output. Most match exactly to work correctly.
<Link>
<href>http://localhost/cgi-bin/testF/add_more_coords.py</href></Link>
</NetworkLink>
<Update>
'<targetHref>http://10.10.210.247/initial_coords.kml</targetHref>\n'
<Update>
You'll notice the targetUrl and NetworkLink URL matching in the tutorial.
Try putting the IP address in the root KML file to match what is generated in the python.
<NetworkLink>
<Link>
<href>http://10.10.210.247/cgi-bin/testF/add_more_coords.py</href>
</Link>
</NetworkLink>
<Update>
'<targetHref>http://10.10.210.247/cgi-bin/testF/add_more_coords.py</targetHref>\n'
<Update>
The jurisdiction I live in published data using a Google globe. The kml file they point to contains
<?xml version='1.0' encoding='UTF-8'?>
<kml xmlns="http://www.opengis.net/kml/2.2"
xmlns:gx="http://www.google.com/kml/ext/2.2">
<gx:GoogleMapsEngineLink>
<href>http://globe.information.qld.gov.au/qldglobe</href>
</gx:GoogleMapsEngineLink>
</kml>
I can't find any reference to the gx:GoogleMapsEngineLink in any public documentation and I am having trouble using that with other standard kml, for example a Place. I'd like a kml that pens this government globe and also adds a Place.
I'd like to be able to add this Place to the Above kml (ie. one kml file)
<?xml version='1.0' encoding='UTF-8'?>
<kml xmlns="http://www.opengis.net/kml/2.2"
<Placemark>
<description>Some nice place</description>
<Point>
<coordinates>153.0064595002,-27.4811714996,0</coordinates>
</Point>
<Style>
<LabelStyle>
<color>ff7fffff</color>
</LabelStyle>
</Style>
</Placemark>
</kml>
The Google KML extensions can be found in Google's KML documentation:
https://developers.google.com/kml/documentation/kmlreference#kmlextensions
The complete XML schema for elements in this extension namespace is located at http://developers.google.com/kml/schema/kml22gx.xsd.
gx:GoogleMapsEngineLink is not a documented part of the Google KML extensions as defined in the namespace http://www.google.com/kml/ext/2.2.
Why don't you create a KMZ file with a root KML file and the gx:GoogleMapsEngineLink loaded in a KML embedded in the KMZ file as an auxiliary file.
Root KML file doc.kml:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<NetworkLink>
<Link>
<href>engine.kml</href>
</Link>
</NetworkLink>
<Placemark>
<description>Some nice place</description>
<Point>
<coordinates>153.0064595002,-27.4811714996,0</coordinates>
</Point>
<Style>
<LabelStyle>
<color>ff7fffff</color>
</LabelStyle>
</Style>
</Placemark>
</Document>
</kml>
And the google engine KML (engine.kml) like this:
engine.kml:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2">
<gx:GoogleMapsEngineLink>
<href>http://globe.information.qld.gov.au/qldglobe</href>
</gx:GoogleMapsEngineLink>
</kml>
Update: Since the <gx:GoogleMapsEngineLink> is special and undocumented it doesn't work as would other KML elements so it cannot appear as child to <Document> element or as target to <NetworkLink>. Likewise, if this element appears at the root level with a Document or Placemark following those Features are ignored.
Google announced it will discontinue the Google Maps Engine product in January 2016.
I could not get my KML to Validate as valid XML because my KML includes a gx (Google Extension) tag (<gx:Tour> for example), and www.google.com/kml/ext/2.2/ is a 404 error.
Here is what I finally got to validate after an hour of trial and error:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"
xmlns:gx="http://www.google.com/kml/ext/2.2"
xmlns:kml="http://www.opengis.net/kml/2.2"
xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.google.com/kml/ext/2.2 http://developers.google.com/kml/schema/kml22gx.xsd">
I don't really know what I'm doing exactly, so I can't make any claims this is a kosher or legitimate fix, or whether that's all necessary. But it's the only way I could get it to validate.
I am developing an application that launches Google Earth with a KML file that links to other local files via <NetworkLink>, which does Time Interval refreshing. I'm trying to define a KML file that will center the map (fly to) a specific location.
Network Link has a tag which flies to the first placemark or FlyTo within the file. However, this would execute the fly to whenever the file is refreshed, which in my case, is when the Time Interval expires. Is there some way that I can have the fly-to command execute only when the linked network file changes, rather than every time? Is there any way to have the Fly To process only once until the linked file is changed somehow? My NetworkLink file is defined as follows:
<NetworkLink>
<name>My Fly To Request</name>
<Link>
<href>MyFlyTo.kmz</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>2</refreshInterval>
</Link>
</NetworkLink>
The application will frequently update the the specific placemark to be centered on when the user requests. It is not a static placemark that needs to be centered on, but one that will change frequently.
I believe you could achieve this by using a combination of ID attributes and the NetworkLinkControl and Update element in Kml.
The MyFlyToRequest.kml file contains the NetworkLink that loads the data file, which contains your data, it has the flyToView element set to true. Notice too the network link also has an id of request
MyFlyToRequest.kml
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<NetworkLink id="request">
<name>My Fly To Request</name>
<Link>
<href>http://www.yourserver.com/MyFlyTo.kmz</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>2</refreshInterval>
</Link>
<flyToView>1</flyToView>
</NetworkLink>
</kml>
The second file, MyFlyTo.kmz, is the one loaded. It has your current data as is..,However, it would also have an additional NetworkLink that loads a new third file.
MyFlyTo.kmz - Edited
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document id="data">
<visibility>1</visibility>
<NetworkLink>
<name>Update MyFlyToRequest</name>
<Link>
<href>http://www.yourserver.com/TurnOffFlyTo.kml</href>
</Link>
</NetworkLink>
<Placemark>
<name>This is flown to once (hopefully)</name>
<Point>
<coordinates>52,0,0</coordinates>
</Point>
</Placemark>
</Document>
</kml>
The new third file TurnOffFlyTo.kml is part of the key to the set up, it contains a NetworkLinkControl that targets the request NetworkLink in the first MyFlyToRequest.kml file. It simply sets flyToView element to 0.
TurnOffFlyTo.kml
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<NetworkLinkControl>
<Update>
<targetHref>http://www.yourserver.com/MyFlyToRequest.kml#request</targetHref>
<Change>
<NetworkLink id="request">
<!-- turn off the flyto behaviour -->
<flyToView>0</flyToView>
</NetworkLink>
</Change>
</Update>
</NetworkLinkControl>
</kml>
The final file TurnOnFlyTo.kml simply retoggles the flyto behaviour again.
TurnOnFlyTo.kml
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<NetworkLinkControl>
<Update>
<targetHref>http://www.yourserver.com/MyFlyToRequest.kml#request</targetHref>
<Change>
<NetworkLink id="request">
<!-- turn off the flyto behaviour -->
<flyToView>1</flyToView>
</NetworkLink>
</Change>
</Update>
</NetworkLinkControl>
</kml>
The logic is as follows.
MyFlyToRequest.kml loads MyFlyTo.kml
flyto is enabled so the view moves the first first placemark, etc, in MyFlyTo.kml
The link in MyFlyTo.kml loads TurnOffFlyTo.kml.
The Update in TurnOffFlyTo.kml three disables flyto in MyFlyToRequest.kml.
File one, refreshes, loads file two...
If you need to re-enable the flyto, you would simply load File four. If the data in MyFlyTo.kmz is being generated by you it would be a simple case of loading TurnOnFlyTo.kml right where TurnOffFlyTo.kml was called.
All that said, this is not tested and as such might not work as is, although in principal I don't see why it wouldn't.
If it sounds like something you might try here are a few resources that should help.
NetworkLinkControl Reference
http://code.google.com/apis/kml/documentation/kmlreference.html#networklinkcontrol
Using Updates
http://code.google.com/apis/kml/documentation/updates.html