KML Coordinates placed at Label coords - should be at shape coords

[msmitherdc]

I'm seeing incorrect coordinates in KML output but only at smaller zoom levels. I'm seeing the behavior in both shapefiles and oraclespatial. Its occuring in points but not in polygons.

I added a debugging line at line 725 of mapkmlrenderer.cpp [r

msDebug("KmlRenderer - 3::add coordinates:\t%.8f,%.8f\n", pts[i].x, pts[i].y);

Attached is the log output.

Interesting, when calling oracle spatial, the correct coords get displayed first then then incorrect coords. Coords are shifted by 8 degress in lat and lon. Shapefiles only show the incorrect coordinates.

[msmitherdc]

Log of coordinates from kml output

[msmitherdc]

revision is [r12054]

[msmitherdc]

Its not zoom level thats causing this, its the LABEL OFFSET.

I have a layer that has a class like this

CLASS

NAME "Passenger Ship Locations" EXPRESSION 'Passenger' STYLE

SYMBOL 'passenger' SIZE 15 ANGLE [DIRECTION]

END

LABEL

ANTIALIAS true BUFFER 0 COLOR 0 0 255 OUTLINECOLOR 255 255 255 FONT "century-gothic-bold" POSITION AUTO SIZE 10 TYPE truetype PARTIALS false OFFSET 8 -8 BUFFER 2

END

END

The LABEL OFFSET is being applied to the KML Placemark

[msmitherdc]

CLASS
    NAME "Passenger Ship Locations"
    EXPRESSION 'Passenger'
    STYLE
      SYMBOL 'passenger'
      SIZE 15
      ANGLE [DIRECTION]
    END
      LABEL
    	  ANTIALIAS true
    	  BUFFER 0
    	  COLOR 0 0 255
    	  OUTLINECOLOR 255 255 255
    	  FONT "century-gothic-bold"
    	  POSITION AUTO
    	  SIZE 10
    	  TYPE truetype
    	  PARTIALS false
 	  OFFSET 8 -8
    	  BUFFER 2
    END
  END

better formatting

[assefa]

mike, I will give it a look early next week. Sorry fir the delay on this.

[msmitherdc]

No problem, it allowed me some time to find out what the problem really was.

Mike

[msmitherdc]

Looks like the problem is here (line 233)

/*if there are labels we want the coordinates to 
      be the center of the element.*/
 for(i=0; i<layer->numclasses; i++)
      layer->_class[i]->label.position = MS_XY;

I don't think we want the placemark at the label coords. I've commented out this section and it now works fine with the LABEL OFFSETs.

I propose we remove placing of Placemarks at the label position.

Mike

[msmitherdc]

Patch to remove label XY as the Placemark XY