I have a series of raster map images that I would like to use in QGIS and overlay some simple GPX routes over the top to produce a custom map image.
This is all quite new to me. I am struggling to get the raster image and GPX layers to display on the same map. My suspicion is that the two layers are using different projections or coordinate systems (excuse me if this the incorrect terminology).
When both layers are displayed in QGIS, they are not even visible in the same display. The coordinates displayed for each are wildly different and are not of the same magnitude.
I'd like to know how to covert the images I have so that can use them with GPX files. For information, these are Australian NSW Lands Department maps as provided with the TopoView 2006 DVD product.
gdalinfo in the raster image reports:
./gdalinfo ~/Desktop/89313s.ecw
Driver: ECW/ERDAS Compressed Wavelets (SDK 3.x)
Files: /Users/jon/Desktop/89313s.ecw
Size is 6168, 3808
Coordinate System is:
PROJCS["MGA56",
GEOGCS["GEOCENTRIC DATUM of AUSTRALIA",
DATUM["GDA94",
SPHEROID["GRS80",6378137,298.257222101]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",0],
PARAMETER["central_meridian",153],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",500000],
PARAMETER["false_northing",10000000],
UNIT["Meter",1]]
Origin = (220464.635367600014433,6304336.451381999999285)
Pixel Size = (4.000000000000000,-4.000000000000000)
Corner Coordinates:
Upper Left ( 220464.635, 6304336.451) (149d59'44.79"E, 33d21'50.07"S)
Lower Left ( 220464.635, 6289104.451) (149d59'27.75"E, 33d30' 3.98"S)
Upper Right ( 245136.635, 6304336.451) (150d15'38.36"E, 33d22'12.14"S)
Lower Right ( 245136.635, 6289104.451) (150d15'22.81"E, 33d30'26.17"S)
Center ( 232800.635, 6296720.451) (150d 7'33.40"E, 33d26' 8.35"S)
Band 1 Block=6168x1 Type=Byte, ColorInterp=Red
Overviews: 3084x1904, 1542x952, 771x476, 385x238
Band 2 Block=6168x1 Type=Byte, ColorInterp=Green
Overviews: 3084x1904, 1542x952, 771x476, 385x238
Band 3 Block=6168x1 Type=Byte, ColorInterp=Blue
Overviews: 3084x1904, 1542x952, 771x476, 385x238
Extract from GPX is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<gpx version="1.1" creator="Garmin Connect"
xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd"
xmlns="http://www.topografix.com/GPX/1/1"
xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<metadata>
<link href="connect.garmin.com">
<text>Garmin Connect</text>
</link>
<time>2010-08-30T21:03:24.000Z</time>
</metadata>
<trk>
<name>Canberra to 'Castle Day 3</name>
<trkseg>
<trkpt lon="150.05063133314252" lat="-33.67591420188546">
<ele>1030.0</ele>
<time>2010-08-30T21:03:24.000Z</time>
<extensions>
<gpxtpx:TrackPointExtension>
<gpxtpx:atemp>2.0</gpxtpx:atemp>
</gpxtpx:TrackPointExtension>
</extensions>
</trkpt>
<trkpt lon="150.05062630400062" lat="-33.67588419467211">