将Lat/long转换为PointClass

这比你现在所说的要多得多。纬度/经度点和地图都有特定的空间参照。如果它们不匹配,很可能你的观点会以一种意想不到的方式出现。

Geographical Coordinate System . 你很可能是想在一张纸上画出这一点 Projected Coordinate System .

因为我不知道你的地图的空间参考,我只能给你一个例子,把一个Lat/Lon转换成MapControl当前的空间参考。

ISpatialReferenceFactory srFactory = new SpatialReferenceEnvironmentClass();

IGeographicCoordinateSystem gcs = srFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);
ISpatialReference sr1 = gcs;

IPoint point = new PointClass() as IPoint;
point.PutCoords(-92.96000, 44.9227);

IGeometry geometryShape;
geometryShape = point;
geometryShape.SpatialReference = sr1;

geometryShape.Project(mapControl.SpatialReference);

mapControl.DrawShape(geometryShape);

这将获取点并将其投影到MapControls当前空间参照,然后打印该点。

祝你好运。

mapControl.MapScale = mapControl.MapScale / 2; //for zooming
ISpatialReferenceFactory srFactory = new SpatialReferenceEnvironmentClass(); //move up top later 
IGeographicCoordinateSystem gcs = srFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984); //World lat / long format
ISpatialReference sr1 = gcs;
IPoint point = new PointClass(); 
point.SpatialReference = gcs;
point.PutCoords(-92.96000, 44.9227);
point.Project(mapControl.SpatialReference);
mapControl.CenterAt(point);