Placement of Marker Graphic

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Placement of Marker Graphic	Clay Harter	Dec 02, 2009
Re: Placement of Marker Graphic	David Piesse	Dec 04, 2009
Re: Placement of Marker Graphic	Clay Harter	Dec 04, 2009
Re: Placement of Marker Graphic	Brian Kowalski	Dec 10, 2009

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Subject	Placement of Marker Graphic
Author	Clay Harter
Date	Dec 02, 2009
Message	It appears that a marker graphic is not centered about it's point location but is always displayed above its location. So if a graphic has this outline: --------- \|---------\| \|---------\| \|---------\| ----X---- It would always be positioned at the "x". Is there any way of specifying that a graphic should be positioned at it's center. The current behavior is only appropriate for a "push-pin" and not any symmetric graphic (e.g. a circle, a square, a well symbol, etc...) Thanks, Clay Harter OpenSpirit Corp.

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Subject	Re: Placement of Marker Graphic
Author	David Piesse
Date	Dec 04, 2009
Message	This is correct! The best way to reposition a graphic over the location is to take 50% of the height (in map units) from the y value of the Graphics location. Here's some code I have used to combat this. This doesnt compensate for map rotation however! For this you would need to do some trig using the current rotation and both the window height and width.
	double mapUnitHeight = ESRI.ArcGISExplorer.Application.Application.ActiveMapDisplay.Extent.Height; double mapPixHeight = ESRI.ArcGISExplorer.Application.Application.ActiveMapDisplay.Size.Height; double units2pixel = mapUnitHeight / mapPixHeight; double GraphicSize = Your_Graphic_Object.Height / 2; double offset = GraphicSize * units2pixel; //You then take 'offset' from your current y value to shift the graphic down

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Subject	Re: Placement of Marker Graphic
Author	Clay Harter
Date	Dec 04, 2009
Message	Yes, I thought of doing this but then this means having to recompute the location of all displayed points every time a window resize or map zoom occurred. A better solution would be if a Graphic object had a x and y offset (in pixels) for the Marker symbol... Thanks, Clay

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Subject	Re: Placement of Marker Graphic
Author	Brian Kowalski
Date	Dec 10, 2009
Message	Ditto. The current behavior is very annoying.
	Brian USCG Enterprise GIS Team