<P>版主，菜菜的问一下，为什么回放的时候所有的点都显示在TEMPLATE层上？</P>
<P>怎么实现只显示一个点的移动呢？而且回放结束以后，所有的点信息仍然保存在TEMPLATE层上，怎么清空呢？</P>

<img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" />

<img src="images/post/smile/dvbbs/em02.gif" />

谢谢老大

<P>'经纬度BL换算到高斯平面直角坐标XY（高斯投影正算）<BR>Private Function Deg2XY(ByRef F2 As Double, ByRef E2 As Double, _<BR>                ByRef s2 As Double, ByRef t2 As Double) As Boolean<BR>                'A2 输入中央子午线，以度.分秒形式输入，如115度30分则输入115.30; 起算数据L0<BR>                'F2 以度小数形式输入经度值, L<BR>                'E2 以度小数形式输入纬度值，B<BR>                'S2 计算结果，横坐标Y,,请特别注意，这里生成的是高斯坐标<BR>                'T2 计算结果，纵坐标X<BR>                '投影带号计算　n=[L/6]+1   如：兰州测得经度103.XXXX，故n=[103.X/6]+1=17+1=18<BR>                '中央经线经度　L0 = n*6-3 = [L/6]*6+3<BR>                <BR>    'ByRef A2 As Double,<BR>    Dim A2 As Double<BR>    Dim B2 As Double<BR>    'Dim G2 As Double<BR>    Dim H2 As Double<BR>    Dim i2 As Double<BR>    Dim J2 As Double<BR>    Dim K2 As Double<BR>    Dim l2 As Double<BR>    Dim M2 As Double<BR>    Dim n2 As Double<BR>    Dim O2 As Double<BR>    Dim P2 As Double<BR>    Dim Q2 As Double<BR>    Dim R2 As Double<BR>    Dim NN As Integer '投影代号<BR>'    A2 = CInt(F2 / 6) * 6 - 3<BR>    <BR>'    B2 = Int(A2) + (Int(A2 * 100) - Int(A2) * 100) / 60 + (A2 * 10000 - Int(A2 * 100) * 100) / 3600<BR>    '把L0化成度(A2)<BR>    NN = CInt(F2 / 6) + 1 '投影代号n=[L/6]+1 '<BR>    B2 = NN * 6 - 3 '中央经线<BR>    'G2 = F2 - B2 ' L -L0<BR>    'H2 = G2 / 57.2957795130823 '化作弧度<BR>    H2 = (F2 - B2) / 57.2957795130823 '将经差的单位化为弧度<BR>    i2 = Tan(E2 / 57.2957795130823) 'Tan (B)<BR>    J2 = Cos(E2 / 57.2957795130823) ' Cos (B)<BR>    K2 = 0.006738525415 * J2 * J2<BR>    l2 = i2 * i2<BR>    M2 = 1 + K2<BR>    n2 = 6399698.9018 / Sqr(M2)<BR>    O2 = H2 * H2 * J2 * J2<BR>    P2 = i2 * J2<BR>    Q2 = P2 * P2<BR>    R2 = (32005.78006 + Q2 * (133.92133 + Q2 * 0.7031))<BR>    s2 = ((((l2 - 18) * l2 - (58 * l2 - 14) * K2 + 5) * O2 / 20 + M2 - l2) * O2 / 6 + 1) * n2 * (H2 * J2)<BR>    <BR>    '计算结果,横坐标Y，这里生成的是高斯坐标<BR>    s2 = s2 + NN * 1000000 + 500000 '18500000 '在计算的基础上加上了“带号”（18）和“东移”（500KM）<BR>    '计算结果，纵坐标X<BR>    t2 = 6367558.49686 * E2 / 57.29577951308 - P2 * J2 * R2 + ((((l2 - 58) * l2 + 61) * _<BR>        O2 / 30 + (4 * K2 + 5) * M2 - l2) * O2 / 12 + 1) * n2 * i2 * O2 / 2<BR>    <BR>    Deg2XY = True<BR>End Function</P>

Deg2XY函数是什么啊，有没有具体的代码？

那显示地图的表单 frmMain,应该怎样?

<img src="images/post/smile/dvbbs/em02.gif" />

<img src="images/post/smile/dvbbs/em01.gif" /><img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em08.gif" /><img src="images/post/smile/dvbbs/em06.gif" />

3q