How to

8 Jan 20251 minute to read

Transform latitude and longitude value to pixel value and vice-versa

SfMaps offers two utility methods to transform the pixel values to longitude and latitude values and vice-versa. This method is used for both ShapeFileLayer and ImageryLayer.

• GeopointToViewPoint(double latitude, double longitude) - Converts the latitude and longitude values to screen point. Here, pass the parameters as latitude and longitude values, from that values we can get screen points x and y.
• GetLatLonFromPoint(Point point) - Converts the screen point to longitude and latitude values. Here, pass the parameters as screen points x and y, from that points we can get longitude(Point.X) and latitude(Point.Y) values.

C#

Point pixelPoint = layer.GeopointToViewPoint(21.00, 78.00);
Point longitudeLatitude = layer.GetLatLonFromPoint(pixelPoint);
marker.Latitude = longitudeLatitude.Y;
marker.Longitude = longitudeLatitude.X;