New answers tagged scale
Another possibility is to use the QGIS SimpleSvg plug-in to convert the shapefile to SVG and then use the open source InkScape vector editor or Adobe Illustrator to manipulate the polygons which is trivial. The plugin will embed the attributes in the SVG XML. I am confused about exactly how you're dealing with the shapefile in Java. Swing is just a ...
You can move your features using the Move Feature(s) tool on the Digitizing toolbar. Scaling is a little trickier, but can be done through the Affine tool in the Affine Transformations plug-in. See here for more on how to resize features in QGIS.
You don't want to do that. What you want to do is add a second and third data frames on your map (on layout), one for Alaska, and one for Hawaii.
Essentially the same way the labels are. Go to the General tab instead of the Label tab of the layer properties. There you'll find the same Scale Range settings as for labels. However, unlike labels, the layer itself doesn't offer classes so you can't have one group show up at scale A and another at scale B. The way around this is to add the data as multiple ...
This is not a built in feature, but you can follow this example in which the scale is built with Leaflet: http://bl.ocks.org/xavijam/8433314
The scale is not a constant on map projections. For local map it is not an issue because the change in scale is so small that it is below the precision of the drawing, but for World map there can be huge difference when you change latitude (obviously, in a Mercator projection, the same distance near the pole is not equivalent to the distance near the ...
You can set the Mouse wheel action in Options | Map Tools to Nothing. This deactivates zooming with the mouse.
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