1.0: init

Author: zvezdochiot

LICENSE

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+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org>

README.md

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+# QtProj
+
+coordinate transformation tool by proj4 and Qt
+
+## Depends
+
+* [proj](https://proj.org/)
+
+## Example
+
+### SRC
+
+```
++proj=tmerc +lat_0=0 +lon_0=39 +k=1 +x_0=134156.988 +y_0=-6032524.376 +ellps=krass +towgs84=24.83,-130.97,-81.74,0,0,-0.13,-0.22 +units=m +no_defs
+190473.82
+229747.11
+0
+```
+
+### DEST
+
+```
++proj=longlat
+
+
+
+```
+
+### Result
+
+```
++proj=longlat
+56.11910749
+40.53684436
+0.00000000
+```

image/play.png

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+TEMPLATE = app
+QT += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = qtproj
+
+INCLUDEPATH = src
+
+SOURCES += \
+           src/qtproj.cpp \
+           src/main.cpp
+
+HEADERS += src/qtproj.h
+
+FORMS += src/qtproj.ui
+
+RESOURCES += qtproj.qrc
+
+LIBS += -lproj
+
+# build dir
+UI_DIR  =     build
+MOC_DIR =     build
+RCC_DIR =     build
+OBJECTS_DIR = build
+mytarget.commands += $${QMAKE_MKDIR} build

qtproj.pro

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+<RCC>
+    <qresource prefix="">
+        <file>image/play.png</file>
+    </qresource>
+</RCC>

qtproj.qrc

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+#include <QApplication>
+#include "qtproj.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    QtProj w;
+    w.show();
+    return a.exec();
+}

src/main.cpp

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+#define ACCEPT_USE_OF_DEPRECATED_PROJ_API_H
+#include <proj_api.h>
+#include "qtproj.h"
+
+QtProj::QtProj(QWidget *parent) : QMainWindow(parent)
+{
+    ui.setupUi(this);
+    connect(ui.actionTransfer,SIGNAL(triggered()),this,SLOT(slot_transfer()));
+}
+
+QtProj::~QtProj()
+{
+
+}
+
+void QtProj::slot_transfer()
+{
+    int flag, digits = 8;
+    double lat, lon, height;
+    QString qsSrc, qsDst;
+    projPJ src, dst;
+
+    //TODO: need check
+    lat = ui.le_srcLat->text().toDouble();
+    lon = ui.le_srcLon->text().toDouble();
+    height = ui.le_srcH->text().toDouble();
+    //e.g.
+    //double lat=41.44;
+    //double lon=103.33;
+    //double height=500;
+
+    qsSrc = ui.le_srcCS->text();
+    qsDst = ui.le_dstCS->text();
+    // e.g.
+    // QString qsSrc = "+proj=longlat +datum=WGS84 +no_defs";
+    // QString qsDst = "+proj=tmerc +lat_0=0 +lon_0=105 +k=1 +x_0=18500000 +y_0=0 +ellps=krass +units=m +no_defs  +towgs84=0,0,0,0,0,0,0";
+
+    src = pj_init_plus(qsSrc.toStdString().c_str());
+    dst = pj_init_plus(qsDst.toStdString().c_str());
+
+    if (src == NULL || dst == NULL)
+    {
+        ui.le_dstLat->setText(QString("Error"));
+        if (src == NULL)
+            ui.le_dstLon->setText(QString("Bad Src cs"));
+        if (dst == NULL)
+            ui.le_dstH->setText(QString("Bad Dst cs"));
+        return;
+    }
+
+    if ((qsSrc.contains("+proj=longlat", Qt::CaseInsensitive)) || (qsSrc.contains("+proj=latlong", Qt::CaseInsensitive)))
+    {
+        lon *= DEG_TO_RAD;
+        lat *= DEG_TO_RAD;
+    }
+
+    flag = pj_transform(src, dst, 1, 1, &lon, &lat, &height);
+
+    pj_free(src);
+    pj_free(dst);
+
+    if (flag == 0)
+    {
+        if ((qsDst.contains("+proj=longlat", Qt::CaseInsensitive)) || (qsDst.contains("+proj=latlong", Qt::CaseInsensitive)))
+        {
+            lon /= DEG_TO_RAD;
+            lat /= DEG_TO_RAD;
+        }
+        else
+        {
+            digits = 3;
+        }
+
+        ui.le_dstLat->setText(QString::number(lat, 'f', digits));
+        ui.le_dstLon->setText(QString::number(lon, 'f', digits));
+        ui.le_dstH->setText(QString::number(height, 'f', digits));
+    }
+    else
+    {
+        ui.le_dstLat->setText(QString("Error"));
+        ui.le_dstLon->setText(QString::number(flag, 'd', 2));
+        ui.le_dstH->setText(QString("Error"));
+    }
+}

src/qtproj.cpp

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+#ifndef QTPROJ_H
+#define QTPROJ_H
+
+#include <QMainWindow>
+#include "ui_qtproj.h"
+
+class QtProj : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    QtProj(QWidget *parent = 0);
+    ~QtProj();
+
+private:
+    Ui::QtProjClass ui;
+
+private slots:
+    void slot_transfer();
+};
+
+#endif // QTPROJ_H