Issue 59 - earth-api-samples - Repeating (A.K.A Ghosting) placemarks that arn't removed in a refresh

Issue 59:	Repeating (A.K.A Ghosting) placemarks that arn't removed in a refresh
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Status:	Fixed
Owner:	----
Type-Defect
Priority-Medium
Internal-1251100
Component-Plugin

Reported by sabrick, Aug 18, 2008

I load a kml using the following function: 

function kmlLOADPoint() { 

nl = null; 
nl = ge.createNetworkLink(""); 
nl.setFlyToView(false); 
var link = ge.createLink(""); 
link.setHref("http://65.68.82.120/kml/test/buffer.kml?nocacher= + 
(new 
Date()).getUTCSeconds()); 
link.setRefreshMode(ge.REFRESH_ON_INTERVAL); 
link.setRefreshInterval(20); 
nl.setLink(link); 
ge.getGlobe().getFeatures().appendChild(nl); 


} 


<body onload="init(); setTimeout('kmlLOADPoint()',6000);></body> 

The kml is constantly being rewritten everyone 30 seconds or so, being 
populated through by another automated process using SQL data. The kml 
file being loaded looks something like this: (keep in mind this example 
I'm about to show you only has 1 placemark in it, the true file has almost 
300) 


<?xml version="1.0" encoding="UTF-8"?> 
<kml xmlns="http://earth.google.com/kml/2.2"> 
<sessionState cookieless="true"/> 
<Document> 
  <Style id="Arrivals"> 
    <LabelStyle> 
      <color>FFEBCE87</color> 
      <colorMode>normal</colorMode> 
      <scale>1.4</scale> 
    </LabelStyle> 
  </Style> 
  <Style id="Sailings"> 
    <LabelStyle> 
      <color>FF8CE6F0</color> 
      <colorMode>normal</colorMode> 
      <scale>1.4</scale> 
    </LabelStyle> 
  </Style> 
  <Style id="Shifts"> 
    <LabelStyle> 
      <color>FF008800</color> 
      <colorMode>normal</colorMode> 
      <scale>1.4</scale> 
    </LabelStyle> 
  </Style> 
<name>test_placemark.kml</name> 
<open>1</open> 
    <Placemark id = "1193046"> 
      <name></name> 
      <description> 
        <![CDATA[<table width = "200px"><tr><td>MMSI: 1193046</td></ 
tr>]]> 
        <![CDATA[<tr><td>Speed: 0</td></tr>]]> 
        <![CDATA[<tr><td>Heading: °</td></tr>]]> 
        <![CDATA[<tr><td>Type: OTH</td></tr>]]> 
        <![CDATA[<tr><td>Status: Underway with Engine</td></tr>]]> 
        <![CDATA[<tr><td>Heading Status: </td></tr>]]> 
        <![CDATA[</table>]]> 
      </description> 
      <Point> 
        <coordinates>-93.8649966666667,29.7221966666667,0</ 
coordinates> 
      </Point> 
      <Style> 
        <IconStyle> 
          <scale>1.1</scale> 
          <heading></heading> 
          <Icon> 
          <href>http://65.68.82.120/Icons/Moving/OTH_Moving.png</href> 
          </Icon> 
          <hotSpot x="13" y="10" xunits="pixels" yunits="pixels"/> 
        </IconStyle> 
        <BalloonStyle> 
        <text><![CDATA[<table width="120px"><tr><td> $[description] </ 
td></tr></table> ]]></text> 
        </BalloonStyle> 
      </Style> 
    </Placemark> 
</Document> 
</kml> 


The problem is: 


I CONSTANTLY get repeats of the same placemark. These placemarks have 
latitudes and longitudes associated with each of them, all of them 
slowly changing over time. From time to time I will see the same 
placemark being represented twice as if the older one was 'ghosting' 
the newer one. They eventually go away but they are none the less 
unsightly. 


Does anyone have any idea how this may be happening? Keep in mind not 
all of them are doing this, usually only a handful are... a large 
handful though.

Comment 3 by api.roman.public, Aug 19, 2008

(No comment was entered for this change.)

Labels: Internal-1251100

Comment 4 by dusan.fe...@vsb.cz, Sep 15, 2008

The same problem exists when the network link is refreshed by VIEW_REFRESH_ON_STOP
option.

Comment 5 by JSOmithO, Oct 16, 2008

same problem

Comment 6 by trstnmklsn, Nov 14, 2008

same problem here. updating 'onChange' creates duplicate placemark.
garahhhhfadfjasdhfklj12213321one234

Comment 7 by jnicolini, Dec 02, 2008

Have you tried adding a randomly generated number to the end of your network link 
filename? Like .kmz?1228255529

Comment 8 by api.roman.public, Dec 03, 2008

Should be fixed in latest plugin.

Status: Fixed

Comment 9 by apoder...@uoc.edu, May 12, 2009

I'm experiencing this issue with the last version of GE Plugin (GE Plugin
5.0.11655.6079 under Firefox 3.0.10 and IE 7.0.5730.11). With a networkLink and
"VIEW_REFRESH_ON_STOP", every time the KML document is reloaded all the placemarks
that the user have clicked before are duplicated and remain on the screen with no
possibility to be removed. So, this bug don't seem to be fixed yet.

Comment 10 by api.roman.public, May 12, 2009

(No comment was entered for this change.)

Status: Accepted

Comment 11 by api.roman.public, May 14, 2009

Hi,

Can you provide a demo URL? I can't reproduce the problem with 5.0.11655.6079 and 
VIEW_REFRESH_ON_STOP.

Thanks,
Roman

Comment 12 by apoder...@uoc.edu, May 15, 2009

My application is in a local server so I can't give you access to it, but I've found
a way to reproduce it.

1. Go to AJAX APIs Playground / Create a Network Link:
http://code.google.com/apis/ajax/playground/?exp=earth#create_networklink

2. Change the "createNetworkLink" function to this:

function createNetworkLink() {
    var networkLink = ge.createNetworkLink("");
     networkLink.setName("ciutats");
     networkLink.setFlyToView(true);
   
     // create a Link object
     var link = ge.createLink("");
     link.setHref("http://www.entrevistestv.phpnet.us/borra.kml");
     link.setViewRefreshTime(4);
     link.setViewRefreshMode(ge.VIEW_REFRESH_ON_STOP);
     link.setViewFormat("BBOX=[bboxWest],[bboxSouth],[bboxEast],[bboxNorth]");
     
     // attach the Link to the NetworkLink
     networkLink.setLink(link);
   
     // add the NetworkLink feature to Earth
     ge.getFeatures().appendChild(networkLink)
}

3. Click on the placemarks to open the balloons (you can close them after), move the
map just a little and wait 4 seconds for the Network Link to reload.

4. A copy of every clicked placemark is created (at least in my computer).

In my application the BBOX variable is used to select dinamically just some
Placemarks every time, but the KML generated is similar to this simple example:

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.2">
<Document id="ciutats">
	<Placemark>
		<name>Lleida</name>
		<description>Capital de Lleida</description>
		<Point>
        	<coordinates>0.6452847123146057,41.628318786621094,0</coordinates>
		</Point>
	</Placemark>
	<Placemark>
		<name>Barcelona</name>
		<description>Capital de Barcelona</description>
		<Point>
        	<coordinates>2.14224000254708,41.360036579191,0</coordinates>
		</Point>
	</Placemark>
	<Placemark>
		<name>Tarragona</name>
		<description>Capital de Tarragona</description>
		<Point>
        	<coordinates>1.237298678043188,41.10952788064577,0</coordinates>
		</Point>
	</Placemark>
	<Placemark>
		<name>Girona</name>
		<description>Capital de Girona</description>
		<Point>
			<coordinates>2.817363133455735,41.96935935786346,0</coordinates>
		</Point>
	</Placemark>
</Document>
</kml>

Comment 13 by api.roman.public, May 21, 2009

(No comment was entered for this change.)

Labels: Component-Plugin

Comment 14 by api.roman.public, May 29, 2009

Thanks for the report; this should be fixed internally for a future release.

Comment 15 by api.roman.public, Aug 08, 2009

(No comment was entered for this change.)

Status: Confirmed

Comment 16 by api.roman.public, Aug 08, 2009

Bulk edit.

Comment 17 by api.roman.public, Aug 08, 2009

(No comment was entered for this change.)

Status: FixedNotReleased

Comment 18 by api.roman.public, Sep 09, 2009

Fixed as of 5.1.3506.3999 (API v1.003); see announcement here:

http://groups.google.com/group/google-earth-api-notify/browse_thread/thread/6a32fdfcc60236e

If this issue is still not fixed, please let us know.

Status: Fixed

Comment 19 by carson.powers, Sep 30, 2009

After a lot of testing on my end I can no longer reproduce the defect! Thank you Roman!

Comment 20 by steve7462, Nov 17, 2009

I am getting a similar problem still. I am not sure if the two are related. I am
running 5.1.3509.4636.

My placemarks are updated periodically via network link. If I don't hover the mouse
over the placemark, it get removed and re-rendered as expected. But if I hover over
the placemark when the reload starts, the old placemark does not get removed. I
tested the same file with Google Earth, and it worked as expected.