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Talk:MapStructure Optimizations

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selectable Ranges API

var  setSelectableMapRangesNm = func (range_vector, unit='nm') {
foreach(var range; range_vector) {
 var groupName = sprintf("visibility-range-%d-%s",range, unit);
 map.createChild("group", groupName);
 }# foreach range

# range based allocation of layers/groups
setSelectableMapRangesNm( [5,10, 20, 40, 80, 160, 320, 640] );