Thanks for the tip. I investigating further after I posted my question and that is what I used.Here is my code, using Jquery selectors:// Get width of map div var mapDivWidth = $("#mapDiv").width(); // Get width of the div which is partialy obscuring the mapDiv var tableListWidth = $("#propertyList").width(); // Get the min and max X coordinate of the current map var minX = map.toMap(esri.geometry.ScreenPoint(0,0)); var maxX = map.toMap(esri.geometry.ScreenPoint((mapDivWidth-1),0)); // Calculate the current pixel resolution var pointResolution = (maxX.x - minX.x)/mapDivWidth; // Get the correct map center var currentMapCenter = (mapDivWidth - tableListWidth) / 2; // Get the wished offset in coordinate system units offset = ((mapDivWidth / 2) - currentMapCenter) * pointResolution; //...... follows the code where I apply the offset