mirror of
https://github.com/tumic0/GPXSee.git
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266 lines
7.2 KiB
C++
266 lines
7.2 KiB
C++
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#include "latlon.h"
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#include "utm.h"
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#include "mapfile.h"
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static double parameter(const QString &str, bool *res)
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{
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QString field = str.trimmed();
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if (field.isEmpty()) {
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*res = true;
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return NAN;
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}
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return field.toDouble(res);
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}
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int MapFile::parse(QIODevice &device, QList<CalibrationPoint> &points,
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QString &projection, Projection::Setup &setup, QString &datum)
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{
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bool res, r[8];
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int ln = 1;
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while (!device.atEnd()) {
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QByteArray line = device.readLine();
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if (ln == 1) {
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if (!line.trimmed().startsWith("OziExplorer Map Data File"))
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return ln;
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} else if (ln == 2)
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_name = line.trimmed();
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else if (ln == 3)
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_image = line.trimmed();
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else if (ln == 5)
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datum = line.split(',').at(0).trimmed();
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else {
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QList<QByteArray> list = line.split(',');
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QString key(list.at(0).trimmed());
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bool ll = true; bool pp = true;
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if (key.startsWith("Point") && list.count() == 17
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&& !list.at(2).trimmed().isEmpty()) {
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CalibrationPoint p;
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int x = list.at(2).trimmed().toInt(&res);
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if (!res)
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return ln;
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int y = list.at(3).trimmed().toInt(&res);
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if (!res)
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return ln;
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int latd = list.at(6).trimmed().toInt(&res);
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if (!res)
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ll = false;
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qreal latm = list.at(7).trimmed().toFloat(&res);
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if (!res)
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ll = false;
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int lond = list.at(9).trimmed().toInt(&res);
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if (!res)
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ll = false;
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qreal lonm = list.at(10).trimmed().toFloat(&res);
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if (!res)
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ll = false;
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if (ll && list.at(8).trimmed() == "S") {
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latd = -latd;
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latm = -latm;
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}
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if (ll && list.at(11).trimmed() == "W") {
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lond = -lond;
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lonm = -lonm;
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}
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p.zone = list.at(13).trimmed().toInt(&res);
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if (!res)
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p.zone = 0;
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qreal ppx = list.at(14).trimmed().toFloat(&res);
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if (!res)
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pp = false;
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qreal ppy = list.at(15).trimmed().toFloat(&res);
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if (!res)
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pp = false;
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if (list.at(16).trimmed() == "S")
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p.zone = -p.zone;
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p.rp.xy = QPoint(x, y);
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if (ll) {
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p.ll = Coordinates(lond + lonm/60.0, latd + latm/60.0);
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if (p.ll.isValid())
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points.append(p);
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else
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return ln;
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} else if (pp) {
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p.rp.pp = QPointF(ppx, ppy);
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points.append(p);
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} else
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return ln;
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} else if (key == "IWH") {
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if (list.count() < 4)
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return ln;
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int w = list.at(2).trimmed().toInt(&res);
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if (!res)
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return ln;
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int h = list.at(3).trimmed().toInt(&res);
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if (!res)
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return ln;
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_size = QSize(w, h);
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} else if (key == "Map Projection") {
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if (list.count() < 2)
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return ln;
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projection = list.at(1);
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} else if (key == "Projection Setup") {
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if (list.count() < 8)
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return ln;
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setup = Projection::Setup(
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parameter(list[1], &r[1]), parameter(list[2], &r[2]),
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parameter(list[3], &r[3]), parameter(list[4], &r[4]),
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parameter(list[5], &r[5]), parameter(list[6], &r[6]),
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parameter(list[7], &r[7]));
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for (int i = 1; i < 8; i++)
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if (!r[i])
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return ln;
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}
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}
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ln++;
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}
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return 0;
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}
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bool MapFile::parseMapFile(QIODevice &device, QList<CalibrationPoint> &points,
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QString &projection, Projection::Setup &setup, QString &datum)
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{
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int el;
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if (!device.open(QIODevice::ReadOnly)) {
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_errorString = QString("Error opening map file: %1")
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.arg(device.errorString());
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return false;
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}
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if ((el = parse(device, points, projection, setup, datum))) {
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_errorString = QString("Map file parse error on line %1").arg(el);
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return false;
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}
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return true;
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}
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bool MapFile::createDatum(const QString &datum)
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{
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_datum = Datum(datum);
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if (_datum.isNull()) {
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_errorString = QString("%1: Unknown datum").arg(datum);
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return false;
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}
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return true;
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}
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bool MapFile::createProjection(const QString &name,
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const Projection::Setup &setup, QList<CalibrationPoint> &points)
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{
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if (name == "Mercator")
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_projection = Projection::projection(_datum, 1024, setup);
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else if (name == "Transverse Mercator")
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_projection = Projection::projection(_datum, 9807, setup);
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else if (name == "Latitude/Longitude")
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_projection = new LatLon();
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else if (name == "Lambert Conformal Conic")
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_projection = Projection::projection(_datum, 9802, setup);
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else if (name == "Albers Equal Area")
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_projection = Projection::projection(_datum, 9822, setup);
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else if (name == "(A)Lambert Azimuthual Equal Area")
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_projection = Projection::projection(_datum, 9820, setup);
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else if (name == "(UTM) Universal Transverse Mercator") {
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Projection::Setup s;
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if (points.first().zone)
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s = UTM::setup(points.first().zone);
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else if (!points.first().ll.isNull())
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s = UTM::setup(UTM::zone(points.first().ll));
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else {
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_errorString = "Can not determine UTM zone";
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return 0;
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}
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_projection = Projection::projection(_datum, 9807, s);
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} else if (name == "(NZTM2) New Zealand TM 2000")
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_projection = Projection::projection(_datum, 9807, Projection::Setup(
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0, 173.0, 0.9996, 1600000, 10000000, NAN, NAN));
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else if (name == "(BNG) British National Grid")
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_projection = Projection::projection(_datum, 9807, Projection::Setup(
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49, -2, 0.999601, 400000, -100000, NAN, NAN));
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else if (name == "(IG) Irish Grid")
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_projection = Projection::projection(_datum, 9807, Projection::Setup(
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53.5, -8, 1.000035, 200000, 250000, NAN, NAN));
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else if (name == "(SG) Swedish Grid")
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_projection = Projection::projection(_datum, 9807, Projection::Setup(
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0, 15.808278, 1, 1500000, 0, NAN, NAN));
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else if (name == "(I) France Zone I")
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_projection = Projection::projection(_datum, 9802, Projection::Setup(
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49.5, 2.337229, NAN, 600000, 1200000, 48.598523, 50.395912));
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else if (name == "(II) France Zone II")
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_projection = Projection::projection(_datum, 9802, Projection::Setup(
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46.8, 2.337229, NAN, 600000, 2200000, 45.898919, 47.696014));
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else if (name == "(III) France Zone III")
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_projection = Projection::projection(_datum, 9802, Projection::Setup(
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44.1, 2.337229, NAN, 600000, 3200000, 43.199291, 44.996094));
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else if (name == "(IV) France Zone IV")
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_projection = Projection::projection(_datum, 9802, Projection::Setup(
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42.165, 2.337229, NAN, 234.358, 4185861.369, 41.560388, 42.767663));
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else if (name == "(VICGRID) Victoria Australia")
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_projection = Projection::projection(_datum, 9802, Projection::Setup(
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-37, 145, NAN, 2500000, 4500000, -36, -38));
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else if (name == "(VG94) VICGRID94 Victoria Australia")
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_projection = Projection::projection(_datum, 9802, Projection::Setup(
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-37, 145, NAN, 2500000, 2500000, -36, -38));
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else {
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_errorString = QString("%1: Unknown map projection").arg(name);
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return false;
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}
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return true;
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}
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bool MapFile::computeTransformation(QList<CalibrationPoint> &points)
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{
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QList<ReferencePoint> rp;
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for (int i = 0; i < points.size(); i++) {
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if (points.at(i).rp.pp.isNull())
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points[i].rp.pp = _projection->ll2xy(points.at(i).ll);
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rp.append(points.at(i).rp);
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}
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Transform t(rp);
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if (t.isNull()) {
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_errorString = t.errorString();
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return false;
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}
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_transform = t.transform();
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return true;
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}
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bool MapFile::load(QIODevice &file)
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{
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QList<CalibrationPoint> points;
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QString projection, datum;
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Projection::Setup setup;
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if (!parseMapFile(file, points, projection, setup, datum))
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return false;
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if (!createDatum(datum))
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return false;
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if (!createProjection(projection, setup, points))
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return false;
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if (!computeTransformation(points))
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return false;
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return true;
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}
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