I just georeferenced a map of Iceland using the ISN93 coordinate system. It looks like it was successful since when I transform some random coordinates to WGS84 and compare them to Google Maps it does match.

For the raster image I used a map 1:2'000'000 that I downloaded from the cadastral office, so it should be accurate.

But when I try to view it on QGIS I need a scale of at least 1:10'000'000'000 to see it.

Why is that?

  • Did you load your GCP points from a file, or input them manually by clicking on the raster and then on a base map? If you used a base map, are you sure the base map is accurate? – csk Jul 6 '18 at 20:37
  • Did you give the coordinates of GCPs in metres? – Zoltan Jul 7 '18 at 6:53
  • Zoltan, that's actually a good question... I really don't know. That's what i put in - if it helps (I used the ISN93 coordinates). 64° 0.842'N, 16° 40.622'W (ISN93: 613591, 392170) – marcin Jul 7 '18 at 9:42
  • Note that ISN93 EPSG:4659 uses decimal degrees, while ISN93/Lambert 1993 EPSG:3057 uses meters. – AndreJ Jul 7 '18 at 12:07

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