Yes, it's a data type issue. Qgis imports as text so the data was not visible I used Field Calculator to convert text to real and suddenly it all worked I hope a future manual will mention this, as it affects everything Roy 2012/9/1 Langen Mallya <[email protected]>
> Look at the data types its real a numeric in definition. > On Sep 1, 2012 12:19 AM, "Roy Marsh" <[email protected]> wrote: > > > > IN QGIS 1.8 I want to create a simple choropleth to show 5 bands for a > range of numeric values > > I open Properties /Style for the vector layer and choose Legend Type > 'Continuous Colour' > > This should allow me to group values in a specified field into > meaningful bands > > Unfortunately, the 'classification field' box is greyed out in the > dialogue box, so no existing fields are selectable > > Strangely, if a new field is created, this becomes one of the selectable > fields in the 'Classification field' box > > > > Surely the system should not behave like this? > > > > Roy > > > > > > _______________________________________________ > > Qgis-user mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/qgis-user > > > >
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