<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.KiuEmail17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Dear QGIS-Developer,<o:p></o:p></p><p class=MsoNormal>I am writing a simple program to display raster data using qgis api C++.<o:p></o:p></p><p class=MsoNormal>When I open raster data that has different coordinate systems, the on-the-fly feature does not work on my mapCanvas.<o:p></o:p></p><p class=MsoNormal>Can someone help me?<o:p></o:p></p><p class=MsoNormal>This is my code:<o:p></o:p></p><p class=MsoNormal><span style='font-family:"Courier New"'>OpenGisData::OpenGisData(QWidget *parent)<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>: QMainWindow(parent)<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>{<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> setupUi(this);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> QWidget* centralWidget = OpenGisDataClass::centralWidget;<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> mMapCanvas = new QgsMapCanvas(centralWidget);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> QGridLayout* gridLayout = new QGridLayout;<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> gridLayout->addWidget(mMapCanvas);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> centralWidget->setLayout(gridLayout);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> connect(actionOpen, &QAction::triggered, this, &OpenGisData::open);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>}<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>void OpenGisData::open()<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>{<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> QString fileName = QFileDialog::getOpenFileName(this, "Open data", "D:\\Test");<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> if (!fileName.isEmpty())<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> QgsRasterLayer* rasterLayer = new QgsRasterLayer(fileName);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> if (rasterLayer && rasterLayer->isValid())<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> QList<QgsMapLayer*> layers = mMapCanvas->layers();<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> layers.append(rasterLayer);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> mMapCanvas->setLayers(layers);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> mMapCanvas->zoomToFullExtent();<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>}<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank You<o:p></o:p></p></div></body></html>