1

I am attempting to add a scale bar into QGIS Map Composer for a single layer showing a map of Jervis Bay, NSW Australia. I have changed both the project and layer CRS to 'MGA56 (EPSG:28356)' and have tried some other CRS types but the scale is inaccurate. Each time I insert a new scale it shows an area that would be over 3 km long as only 0.2 m or so. I need the scale to be in km and I need it to be an accurate representation of the area I have on the map.

I am completely new to QGIS and have little experience with any of this software.

Improve this question
5
  • Why EPSG:4176 - Australian Antarctic, Jervis Bay is in MGA56 (EPSG:28356), you're way outside the domain of EPSG:4176. Try that and you should be able to get Km.
    – Michael Stimson
    Mar 17, 2015 at 23:32
  • Thanks for your response. I changed the CRS to MGA56 (EPSG:28356) but the scale is still in meters and shows an area of around 3 km in size as only 0.2 m. I know I was able to get an accurate scale in km once but have no idea how I did it and unfortunately didn't save the map. Any thoughts? Thank you
    – Rhiannon
    Mar 17, 2015 at 23:42
  • Ensure the map (project) spatial reference is correct, then with the map selected hit new scale bar, it should be in Km. Possibly better to start with a new composer.
    – Michael Stimson
    Mar 18, 2015 at 0:07
  • Thank you, I finally got it! Not exactly sure how but it's there in km and it looks right. Thanks for your help :-)
    – Rhiannon
    Mar 18, 2015 at 0:31
  • Also make sure the Scalebar property 'Map units per bar unit' is set to 1.
    – Jakob
    Mar 18, 2015 at 7:51

1 Answer 1

Reset to default
1

It is purely due to the wrong UTM Zone. Choose the appropriate UTM Zone of the country or region that you are working on.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.