New answers tagged scale
Set floor-plan in the background image Draw polygon on the background Expose the floor-plan into map Ready
re the minimum and maximum, scale is a ratio, so 1:1 is larger than 1:10000. 1:1 is a large scale, and 1:10000 is a small scale. I think the minimum and maximum is formally correct.
Check if the shapefile's spatial index is stale or corrupt. Based on this technical article from ESRI, the shapefile's spatial index maybe corrupted. The technical article offers a solution that may help you solve the problem. Please have a look at it. Another option is to try to export your data to a new shapefile, and see if that solve your problem.
Use a "numeric" type scalebar and voila:
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