[1]).toFixed(6)
                    ];
                    var lngIndex = api.value(0);
                    var latIndex = api.value(1);
                    var pointLeftTop = getCoord(params, api, lngIndex, latIndex);
                    var pointRightBottom = getCoord(params, api, lngIndex + 1, latIndex + 1);

                    return {
                        type: 'rect',
                        shape: {
                            x: pointLeftTop[0],
                            y: pointLeftTop[1],
  