[Qgis-user] Preferred Scale of a Polygon Shapefile?
Tim Makins
tsg.makins at gmail.com
Fri Sep 6 02:41:37 PDT 2019
If a polygon shapefile has no included scale information, is there a
QGIS tool that will assess it and determine the preferred range of
scales that would be most suitable, or is this only done by eye? I have
seen comments suggesting a visual comparison with features in files of
known-scale, but hoped there might be some automatic tool.
Such a tool would assess the suitable scale for any polygon or line
shapefile, as guidance to learn whether it can be incorporated into a
map with other shapefiles who's scale is already known. I think this
would be a very useful tool, and am wondering if it is already available.
Say, for instance, that I are making a map with shapefiles containing
Medium scale data, 1:50m, from, say, Natural Earth
(https://www.naturalearthdata.com/downloads/). I might wish to include
another polygon shapefile, but if it is too coarse, it would look
stupid, and if it is too fine, it would look out of place, and would be
better simplified. The tool I am thinking of would be able to assess the
unknown shapefile, and give a range of scales that it would be
appropriate to use the unknown shapefile in: for instance from 1:40m to
1:60m.
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