Tricks & Tips; large polygons

More Tricks

How to remove (often badly plotted) large polygons?

In certain areas large polygons have been added to Openstreetmap. Their inaccuracy is a nuisance; fortunately there is a way of excluding them:

area_size() < 25000 & military=* [0x04 resolution 20]

(landuse=farm |landuse=farmland) & area_size() < 15000 [0x4e resolution 20]

To determine the maximum area of all the polygons in your map you can use 'echotags' ,ie

(landuse=farm |landuse=farmland) & area_size() >100 {echotags "areas"} [0x4e resolution 20]

in Mapuploader 5 tick 'echotags' to save results.