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This is not QGIS but if you don't consider OpenJUMP Plus totally off-topic, then you can do it like this: Create a grid which has some unique ID as an attribute. Open grid layer and building layer as separate layers into a project. Use the Aggregate function of OpenJUMP Plus. Define that ID attribute will be aggregated by the "majority" criteria. ...


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Intersect your building layer and grid layer (Vector > Geoprocessing Tools > Intersect). The result should be your buildings, cut up wherever they cross a grid line. Those pieces should have both the building id attribute and the grid cell id attribute. Open the attribute table use the Field Calculator to create a new field and calculate the area of each ...


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As dmahr said, this isn't possible but there are workarounds. My normal one is to create a separate legend for those items and use the legend title for your text instead of the layer heading. The title can be centered above all the columns in the legend, unlike the layer name or layer heading. So in your example map, I'd create 3 legends: one for Fire Hazard ...


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There is no way to stretch the heading across multiple columns using the built-in legend functionality in ArcMap. You could repeat the heading across both columns by splitting your layer into two, but that's probably not desirable. My recommendation would be to hide the layer heading in your legend and use a static text element (e.g. Rectangle Text box) to ...



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