[Qgis-developer] A suggestion for "Scale and measurement"

Carson Farmer carson.farmer at gmail.com
Sat Aug 8 05:13:59 EDT 2009

> I propose we change the wording on the units selector to "Default 
> layer units when OTF Projections is turned off",
> and gray this area out when OTFP is on. We also add another selector 
> (maybe in global options instead of project options?)
> called "Measurement presentation units:  (*) Metric  (*) Imperial".
> A question is what to display when a) OTFP is off and the layer unit 
> selected is degrees, or
When no units are known (i.e. no CRS info with the layer), what about 
Martin's previous suggestions of 'Unknown' units? When the layer is 
*actually* in degrees, what not keep with degrees, letting the user know 
that they should first project the layer before trying to do measurements?
> b) OTFP is on and the map CRS is geo (such as WGS84). Should we use 
> sq. degrees or should we
> convert distances/areas on an ellipsoid?
I my opinion we should do the latter,. Thoughts? It would be great if 
this made it in time for this next release...


Carson J. Q. Farmer
ISSP Doctoral Fellow
National Centre for Geocomputation (NCG),
National University of Ireland, Maynooth,
Email: Carson.Farmer at gmail.com
Web:   http://www.carsonfarmer.com/

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