MapForums

Hi there,
I'm working on a C# desktop application with MapPoint2004 ActiveX control for Europe. I've to allow user to draw circles over the map. Everything looks fine until map is on default zoom/altitude. But when the map is zoomed in or zoomed out then circle drawn is not adjusted according to the map's zoom. While floating this question one of the member advised the link to see an article on microsoft site. Here is that link
http://support.microsoft.com/?kbid=2...br /> Regards

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Hi,

I dont understeand your question. Maybe it is because we speak different languages..

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Hi

I had a similar problem - it seems that ConvertToPoint does not take into account the Zoom property of the MapSpecification object because it makes use of a View, not aMapSpecification.

The View is then used by the MapSpecification and the MapSpecification is used by GetMap to render the map. Since ConvertToPoint doesn't have zoom info it can't take it into account.

To overcome the problem I worked out a formula to adjust my pixel coordinates taking zoom into account. This seems to work. Perhaps it can be adapted to help with your problem.

I am setting the locations of controls on my "pbMap" picturebox to the points worked out below. These controls were added previously.


PixelCoord[] arrayPoints = new PixelCoord[listStatusObjects.Count];
arrayPoints = renderService.ConvertToPoint(arrayLatLong, currentView, pbMap.Width, pbMap.Height);

for (int i = 0; i < listStatusObjects.Count; i++) //listStatusObjects.Count
{
double z = 1 / currentZoom;
double Xtrans = (arrayPoints[i].X * z) - (pbMap.Width/2 * (z -1));
double Ytrans = (arrayPoints[i].Y * z) - (pbMap.Height/2 * (z -1));

pbMap.Controls[i].Left = (int)Xtrans;
pbMap.Controls[i].Top = (int)Ytrans;
}