mgrspoint.java

openmap java写的开源数字地图程序. 用applet实现,可以像google map 那样放大缩小地图.

        if (colInt == I || (colOrigin < I && colInt > I)
                || ((colInt > I || colOrigin < I) && rollover)) {
            colInt++;
            if (DEBUG)
                System.out.println("skipping I in col, new value: "
                        + (char) colInt);
        }
        if (colInt == O || (colOrigin < O && colInt > O)
                || ((colInt > O || colOrigin < O) && rollover)) {
            colInt++;
            if (DEBUG)
                System.out.println("skipping O in col, new value: "
                        + (char) colInt);
            if (colInt == I) {
                colInt++;
                if (DEBUG)
                    System.out.println("  hit I, new value: " + (char) colInt);
            }
        }

        if (colInt > Z) {
            colInt = colInt - Z + A - 1;
            if (DEBUG)
                System.out.println("rolling(2) col, new value: "
                        + (char) rowInt);
        }

        if (rowInt > V) {
            rowInt = rowInt - V + A - 1;
            rollover = true;
            if (DEBUG)
                System.out.println("rolling over row, new value: "
                        + (char) rowInt);
        } else {
            rollover = false;
        }

        if (rowInt == I || (rowOrigin < I && rowInt > I)
                || ((rowInt > I || rowOrigin < I) && rollover)) {
            rowInt++;
            if (DEBUG)
                System.out.println("skipping I in row, new value: "
                        + (char) rowInt);
        }

        if (rowInt == O || (rowOrigin < O && rowInt > O)
                || ((rowInt > O || rowOrigin < O) && rollover)) {
            rowInt++;
            if (DEBUG)
                System.out.println("skipping O in row, new value: "
                        + (char) rowInt);
            if (rowInt == I) {
                rowInt++;
                if (DEBUG)
                    System.out.println("  hit I, new value: " + (char) rowInt);
            }
        }

        if (rowInt > V) {
            rowInt = rowInt - V + A - 1;
            if (DEBUG)
                System.out.println("rolling(2) row, new value: "
                        + (char) rowInt);
        }

        String twoLetter = (char) colInt + "" + (char) rowInt;

        if (DEBUG) {
            System.out.println("ending at = " + twoLetter);
        }

        return twoLetter;
    }

    /**
     * Testing method, used to print out the MGRS 100k two letter set
     * tables.
     */
    protected void print100kSets() {
        StringBuffer sb = null;
        for (int set = 1; set <= 6; set++) {
            System.out.println("-------------\nFor 100K Set " + set
                    + ":\n-------------\n");
            for (int i = 19; i >= 0; i -= 1) {
                sb = new StringBuffer((i * 100000) + "\t| ");

                for (int j = 1; j <= 8; j++) {
                    sb.append(" " + get100kID(j, i, set));
                }

                sb.append(" |");
                System.out.println(sb);
            }
        }
    }

    /**
     * The function getMinNorthing returns the minimum northing value
     * of a MGRS zone.
     * 
     * portted from Geotrans' c Lattitude_Band_Value strucure table.
     * zoneLetter : MGRS zone (input)
     */

    protected float getMinNorthing(char zoneLetter)
            throws NumberFormatException {
        float northing;
        switch (zoneLetter) {
        case 'C':
            northing = 1100000.0f;
            break;
        case 'D':
            northing = 2000000.0f;
            break;
        case 'E':
            northing = 2800000.0f;
            break;
        case 'F':
            northing = 3700000.0f;
            break;
        case 'G':
            northing = 4600000.0f;
            break;
        case 'H':
            northing = 5500000.0f;
            break;
        case 'J':
            northing = 6400000.0f;
            break;
        case 'K':
            northing = 7300000.0f;
            break;
        case 'L':
            northing = 8200000.0f;
            break;
        case 'M':
            northing = 9100000.0f;
            break;
        case 'N':
            northing = 0.0f;
            break;
        case 'P':
            northing = 800000.0f;
            break;
        case 'Q':
            northing = 1700000.0f;
            break;
        case 'R':
            northing = 2600000.0f;
            break;
        case 'S':
            northing = 3500000.0f;
            break;
        case 'T':
            northing = 4400000.0f;
            break;
        case 'U':
            northing = 5300000.0f;
            break;
        case 'V':
            northing = 6200000.0f;
            break;
        case 'W':
            northing = 7000000.0f;
            break;
        case 'X':
            northing = 7900000.0f;
            break;
        default:
            northing = -1.0f;
        }
        if (northing >= 0.0) {
            return northing;
        } else {
            throw new NumberFormatException("Invalid zone letter: "
                    + zone_letter);
        }

    }

    private static void runTests(String fName, String inType) {

        LineNumberReader lnr = null;
        PrintStream pos = null;
        String record = null;
        StringBuffer outStr1 = new StringBuffer();
        StringBuffer outStr2 = new StringBuffer();

        try {

            /*
             * File inFile = new File(fName + ".dat"); File outFile =
             * new File(fName + ".out"); FileInputStream fis = new
             * FileInputStream(inFile); FileOutputStream fos = new
             * FileOutputStream(outFile); BufferedInputStream bis =
             * new BufferedInputStream(fis);
             */
            pos = new PrintStream(new FileOutputStream(new File(fName + ".out")));
            lnr = new LineNumberReader(new InputStreamReader(new BufferedInputStream(new FileInputStream(new File(fName)))));

            if (inType.equalsIgnoreCase("MGRS")) {
                outStr1.append("MGRS to LatLonPoint\n\tMGRS\t\tLatitude   Longitude\n");
                outStr2.append("MGRS to UTM\n\tMGRS\t\tZone Easting Northing\n");
            } else if (inType.equalsIgnoreCase("UTM")) {
                outStr1.append("UTM to LatLonPoint\n\tUTM\t\tLatitude   Longitude\n");
                outStr2.append("UTM to MGRS\n\tUTM\t\tMGRS\n");
            } else if (inType.equalsIgnoreCase("LatLon")) {
                outStr1.append("LatLonPoint to UTM\nLatitude   Longitude\t\tZone Easting Northing     \n");
                outStr2.append("LatLonPoint to MGRS\nLatitude   Longitude\t\tMGRS\n");
            }

            while ((record = lnr.readLine()) != null) {
                if (inType.equalsIgnoreCase("MGRS")) {
                    try {
                        MGRSPoint mgrsp = new MGRSPoint(record);
                        record.trim();
                        mgrsp.decode(record);

                        outStr1.append(record + " is " + mgrsp.toLatLonPoint()
                                + "\n");
                        outStr2.append(record + " to UTM: " + mgrsp.zone_number
                                + " " + mgrsp.easting + " " + mgrsp.northing
                                + "\n");
                    } catch (NumberFormatException nfe) {
                        Debug.error(nfe.getMessage());
                    }

                } else if (inType.equalsIgnoreCase("UTM")) {
                    MGRSPoint mgrsp;
                    UTMPoint utmp;
                    float e, n;
                    int z;
                    char zl;
                    String tmp;
                    record.trim();
                    tmp = record.substring(0, 2);
                    z = Integer.parseInt(tmp);
                    tmp = record.substring(5, 11);
                    e = Float.parseFloat(tmp);
                    tmp = record.substring(12, 19);
                    n = Float.parseFloat(tmp);
                    zl = record.charAt(3);
                    utmp = new UTMPoint(n, e, z, zl);
                    LatLonPoint llp = utmp.toLatLonPoint();
                    mgrsp = LLtoMGRS(llp);
                    outStr1.append(record + " is " + llp + " back to "
                            + LLtoUTM(llp) + "\n");
                    outStr2.append(record + " is " + mgrsp + "\n");
                } else if (inType.equalsIgnoreCase("LatLon")) {
                    float lat, lon;
                    int index;
                    String tmp;
                    record.trim();
                    index = record.indexOf("\040");
                    if (index < 0) {
                        index = record.indexOf("\011");
                    }
                    tmp = record.substring(0, index);
                    lat = Float.parseFloat(tmp);
                    tmp = record.substring(index);
                    lon = Float.parseFloat(tmp);
                    LatLonPoint llp = new LatLonPoint(lat, lon);
                    // UTMPoint utmp = LLtoUTM(llp);
                    MGRSPoint mgrsp = LLtoMGRS(llp);
                    outStr1.append(record + " to UTM: " + mgrsp.zone_number
                            + " " + mgrsp.easting + " " + mgrsp.northing + "\n");
                    outStr2.append(record + "    ->    " + mgrsp.mgrs + "\n");
                }

            }

        } catch (IOException e) {
            // catch io errors from FileInputStream or readLine()
            System.out.println("IO error: " + e.getMessage());

        } finally {
            if (pos != null) {
                pos.print(outStr1.toString());
                pos.print("\n");
                pos.print(outStr2.toString());
                pos.close();
            }
            // if the file opened okay, make sure we close it
            if (lnr != null) {
                try {
                    lnr.close();
                } catch (IOException ioe) {
                }
            }

        }

    }

    public static void main(String[] argv) {
        Debug.init();

        ArgParser ap = new ArgParser("MGRSPoint");
        ap.add("mgrs", "Print Latitude and Longitude for MGRS value", 1);
        ap.add("latlon",
                "Print MGRS for Latitude and Longitude values",
                2,
                true);
        ap.add("sets", "Print the MGRS 100k table");
        ap.add("altsets", "Print the MGRS 100k table for the Bessel ellipsoid");
        ap.add("rtc",
                "Run test case, with filename and input data type [MGRS | UTM | LatLon]",
                2);

        if (!ap.parse(argv)) {
            ap.printUsage();
            System.exit(0);
        }

        String arg[];
        arg = ap.getArgValues("sets");
        if (arg != null) {
            new MGRSPoint().print100kSets();
        }

        arg = ap.getArgValues("altsets");
        if (arg != null) {
            MGRSPoint mgrsp = new MGRSPoint();
            mgrsp.setOriginColumnLetters(BESSEL_SET_ORIGIN_COLUMN_LETTERS);
            mgrsp.setOriginRowLetters(BESSEL_SET_ORIGIN_ROW_LETTERS);
            mgrsp.print100kSets();
        }

        arg = ap.getArgValues("mgrs");
        if (arg != null) {
            try {
                MGRSPoint mgrsp = new MGRSPoint(arg[0]);
                Debug.output(arg[0] + " is " + mgrsp.toLatLonPoint());
            } catch (NumberFormatException nfe) {
                Debug.error(nfe.getMessage());
            }
        }

        arg = ap.getArgValues("latlon");
        if (arg != null) {
            try {

                float lat = Float.parseFloat(arg[0]);
                float lon = Float.parseFloat(arg[1]);

                LatLonPoint llp = new LatLonPoint(lat, lon);
                MGRSPoint mgrsp = LLtoMGRS(llp);
                UTMPoint utmp = LLtoUTM(llp);

                if (utmp.zone_letter == 'Z') {
                    Debug.output(llp + "to UTM: latitude limit exceeded.");
                } else {
                    Debug.output(llp + " is " + utmp);
                }

                Debug.output(llp + " is " + mgrsp);

            } catch (NumberFormatException nfe) {
                Debug.error("The numbers provided:  " + argv[0] + ", "
                        + argv[1] + " aren't valid");
            }
        }

        arg = ap.getArgValues("rtc");
        if (arg != null) {
            runTests(arg[0], arg[1]);
        }

    }
}