学步园

新旧图幅号转换的公式如下图所示：

共有50W，25W，10W，5W，2.5W，1W几种比例尺

下面的公式中，字母的下标表示对应的比例尺

H代表新图幅号中的行号，例如：J49E016003中的016，共三位，不足三位的在前面补0

L代表新图幅号中的列号，例如：J49E016003中的003，共三位，不足三位的在前面补0

X代表旧图幅号中的地图代码值，有A，B，C，D的一律转为1，2，3，4

其中[]表示取整，（）表示取模

旧->新

新->旧：

下面是一段将新图幅号转为旧图幅号的示例代码（C#，100W，50W，25W，10W，5W几种比例尺）

//新图幅号转到旧图幅号<br /> private string SheetNoConvert(string newNo)<br /> {<br /> if (newNo.Length != 3 && newNo.Length != 10) return null;<br /> string bigRowNo = newNo[0].ToString();<br /> string bigColNo = newNo.Substring(1, 2);<br /> if (newNo.Length == 3) //100W<br /> return bigRowNo + "-" + bigColNo;<br /> else<br /> {<br /> char scaleChar = newNo[3]; //新图幅号第三位，标识是哪种比例尺<br /> int H, L; //新图幅号的行列代码，H为行代码，L为列代码<br /> //提取行代码和列代码，若非数字，则表示图幅号格式不正确<br /> if (!int.TryParse(newNo.Substring(4, 3), out H) || !int.TryParse(newNo.Substring(7, 3), out L))<br /> return null;<br /> if (newNo[3] == 'B') //50W<br /> {<br /> #region 50W<br /> if (H > 2 || L > 2)<br /> return null;<br /> int X = (H - 1) * 2 + (L - 1) + 1; //旧图幅号对应的地图代码<br /> string code = "";<br /> switch (X)<br /> {<br /> case 1:<br /> code = "A";<br /> break;<br /> case 2:<br /> code = "B";<br /> break;<br /> case 3:<br /> code = "C";<br /> break;<br /> case 4:<br /> code = "D";<br /> break;<br /> default:<br /> break;<br /> }<br /> return bigRowNo + "-" + bigColNo + "-" + code;<br /> #endregion<br /> }<br /> else if (newNo[3] == 'C')//25W<br /> {<br /> #region 25W<br /> if (H > 4 || L > 4)<br /> return null;<br /> int X = (H - 1) * 4 + (L - 1) + 1; //旧图幅号对应的地图代码<br /> string code = "";<br /> if (X > 9)<br /> code = X.ToString();<br /> else code = "0" + X;<br /> return bigRowNo + "-" + bigColNo + "-[" + code + "]";<br /> #endregion<br /> }<br /> else if (newNo[3] == 'D') //10W<br /> {<br /> #region 10W<br /> if (H > 12 || L > 12)<br /> return null;<br /> int X = (H - 1) * 12 + (L - 1) + 1; //旧图幅号对应的地图代码<br /> string code = "";<br /> if (X > 99)<br /> code = X.ToString();<br /> else if (X > 9) code = "0" + X;<br /> else code = "00" + X;<br /> return bigRowNo + "-" + bigColNo + "-" + code + "";<br /> #endregion<br /> }<br /> else if (newNo[3] == 'E') //5W<br /> {<br /> #region 5W<br /> if (H > 24 || L > 24)<br /> return null;<br /> int H10 = (H - 1) / 2 + 1; //10W地形图对应的行号<br /> int L10 = (L - 1) / 2 + 1; //10W地形图对应的列号<br /> int X10 = (H10 - 1) * 12 + (L10 - 1) + 1; //10W旧图幅号对应的地图代码<br /> string code = "";<br /> if (X10 > 99)<br /> code = X10.ToString();<br /> else if (X10 > 9) code = "0" + X10;<br /> else code = "00" + X10;<br /> int X = (H - 2 * H10 + 1) * 2 + (L - 2 * L10 + 1) + 1; //旧图幅号对应的地图代码<br /> switch (X)<br /> {<br /> case 1:<br /> code += "-A";<br /> break;<br /> case 2:<br /> code += "-B";<br /> break;<br /> case 3:<br /> code += "-C";<br /> break;<br /> case 4:<br /> code += "-D";<br /> break;<br /> default:<br /> break;<br /> }<br /> return bigRowNo + "-" + bigColNo + "-" + code + "";<br /> #endregion<br /> }<br /> else return null; //图幅号格式不正确<br /> }

下面是一段将旧图幅号转为新图幅号的示例代码（C#，100W，50W，25W，10W，5W几种比例尺）

//旧图幅号转到新图幅号<br /> private string SheetNoConvert2(string old_number)<br /> {<br /> String[] temp1 = old_number.Split('-');<br /> if (temp1.Length == 1) return "";<br /> else if (temp1.Length == 2)// I-45 100万比例尺的图幅号<br /> return temp1[0] + temp1[1];<br /> else if (temp1.Length == 4) //5W地形图 I-48-060-C<br /> {<br /> #region 5w<br /> int x10 = -1;<br /> if (!int.TryParse(temp1[1], out x10))<br /> return "";<br /> if (!int.TryParse(temp1[2], out x10))<br /> return "";<br /> int x5 = -1;<br /> if (temp1[3] == "A")<br /> x5 = 1;<br /> else if (temp1[3] == "B")<br /> x5 = 2;<br /> else if (temp1[3] == "C")<br /> x5 = 3;<br /> else if (temp1[3] == "D")<br /> x5 = 4;<br /> else return "";<br /> int h10 = (x10 - 1) / 12 + 1;<br /> int l10 = (x10 + 11) % 12 + 1;<br /> int h5 = 2 * h10 + (x5 - 1) / 2 - 1;<br /> int l5 = 2 * l10 + (x5 + 1) % 2 - 1;<br /> string h5s = "";<br /> if (h5 < 10)<br /> h5s = "00" + h5;<br /> else if (h5 < 100)<br /> h5s = "0" + h5;<br /> else h5s = h5.ToString();<br /> string l5s = "";<br /> if (l5 < 10)<br /> l5s = "00" + l5;<br /> else if (l5 < 100)<br /> l5s = "0" + l5;<br /> else l5s = l5.ToString();<br /> return temp1[0] + temp1[1] + "E" + h5s + l5s;<br /> #endregion<br /> }<br /> else if (temp1.Length == 3)<br /> {<br /> if (temp1[2].Length == 1) //50W地形图 H-45-B<br /> {<br /> #region 50w<br /> int x50 = -1;<br /> if (temp1[2] == "A")<br /> x50 = 1;<br /> else if (temp1[2] == "B")<br /> x50 = 2;<br /> else if (temp1[2] == "C")<br /> x50 = 3;<br /> else if (temp1[2] == "D")<br /> x50 = 4;<br /> else return "";<br /> int h50 = (x50 - 1) / 2 + 1;<br /> int l50 = (x50 + 1) % 2 + 1;<br /> string h50s = "";<br /> if (h50 < 10)<br /> h50s = "00" + h50;<br /> else if (h50 < 100)<br /> h50s = "0" + h50;<br /> else h50s = h50.ToString();<br /> string l50s = "";<br /> if (l50 < 10)<br /> l50s = "00" + l50;<br /> else if (l50 < 100)<br /> l50s = "0" + l50;<br /> else l50s = l50.ToString();<br /> return temp1[0] + temp1[1] + "B" + h50s + l50s;<br /> #endregion<br /> }<br /> else if (temp1[2].Length == 4) //25W地形图 H-47-[14]<br /> {<br /> #region 25w<br /> if (temp1[2][0] != '[' || temp1[2][3] != ']')<br /> return "";<br /> int x25 = -1;<br /> if (!int.TryParse(temp1[2].Substring(1, 2), out x25))<br /> return "";<br /> int h25 = (x25 - 1) / 4 + 1;<br /> int l25 = (x25 + 3) % 4 + 1;<br /> string h25s = "";<br /> if (h25 < 10)<br /> h25s = "00" + h25;<br /> else if (h25 < 100)<br /> h25s = "0" + h25;<br /> else h25s = h25.ToString();<br /> string l25s = "";<br /> if (l25 < 10)<br /> l25s = "00" + l25;<br /> else if (l25 < 100)<br /> l25s = "0" + l25;<br /> else l25s = l25.ToString();<br /> return temp1[0] + temp1[1] + "C" + h25s + l25s;<br /> #endregion<br /> }<br /> else if (temp1[2].Length == 3) //10W地形图 K-50-041<br /> {<br /> #region 10w<br /> int x10 = -1;<br /> if (!int.TryParse(temp1[2], out x10))<br /> return "";<br /> int h10 = (x10 - 1) / 12 + 1;<br /> int l10 = (x10 + 11) % 12 + 1;<br /> string h10s = "";<br /> if (h10 < 10)<br /> h10s = "00" + h10;<br /> else if (h10 < 100)<br /> h10s = "0" + h10;<br /> else h10s = h10.ToString();<br /> string l10s = "";<br /> if (l10 < 10)<br /> l10s = "00" + l10;<br /> else if (l10 < 100)<br /> l10s = "0" + l10;<br /> else l10s = l10.ToString();<br /> return temp1[0] + temp1[1] + "D" + h10s + l10s;<br /> #endregion<br /> }<br /> else return "";<br /> }<br /> else return "";<br /> }