[OpenLayers-Trac] [OpenLayers] #1241: basic measurement control

OpenLayers trac at openlayers.org
Thu Feb 14 17:40:06 EST 2008


#1241: basic measurement control
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  Reporter:  tschaub  |       Owner:  tschaub    
      Type:  feature  |      Status:  assigned   
  Priority:  minor    |   Milestone:  2.7 Release
 Component:  Control  |     Version:  2.5        
Resolution:           |    Keywords:             
     State:           |  
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Comment (by tschaub):

 I'll add that this is still a sticky issue.  Reprojecting points and
 assuming Vincenty distances is not always what people expect.  Open a map
 in WGS84, draw a segment from Alaska to Kamchatka.  That segment crosses
 Europe on your map, but the distance calculated is based on a segment that
 does not.  Add points to your segment (keeping the line straight on the
 map) and the Vincenty distance gets longer (though the line on your map
 does not look longer).  Draw a rectangle (four points) encompassing as
 much of the map as you can.  The Vincenty area does not include all of the
 area that is covered by your box.  Anyway, I just mean to say that there
 is not one "real" measurement.

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Ticket URL: <http://trac.openlayers.org/ticket/1241#comment:5>
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