I'm declaring and defining a geoJSON layer first, like:
var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... } }); ..and then loading a CSV into it, like:
omnivore.csv('pbstatus.csv', null, layer1 ) .on('ready', function(e) { ... }); Now, I want to create other geoJSON layers as subsets of layer1 based on the value of one of the CSV's columns loaded into the layer's feature.properties dataset. Is there a way to filter layer1 AFTER it's been defined and loaded? I'm aware of the 'proper' way of filtering when defining the layer:
var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... }, filter: function(feature, layer) { return (feature.properties.foo == 'bar'); } }); .. but I don't want to repetitively do a different declaration each time. And, the data in the CSV is going to decide which layers and how many to form; we may not know all the possible filter conditions before we have imported the CSV. Is there a way I can spawn new layers as subsets of this layer1 after it's been loaded with geoJSON data ? Would the new layers also inherit the properties, actions and behaviours set in layer1's onEachFeature: function?
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var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... } }); ..and then loading a CSV into it, like:
omnivore.csv('pbstatus.csv', null, layer1 ) .on('ready', function(e) { ... }); Now, I want to create other geoJSON layers as subsets of layer1 based on the value of one of the CSV's columns loaded into the layer's feature.properties dataset. Is there a way to filter layer1 AFTER it's been defined and loaded? I'm aware of the 'proper' way of filtering when defining the layer:
var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... }, filter: function(feature, layer) { return (feature.properties.foo == 'bar'); } }); .. but I don't want to repetitively do a different declaration each time. And, the data in the CSV is going to decide which layers and how many to form; we may not know all the possible filter conditions before we have imported the CSV. Is there a way I can spawn new layers as subsets of this layer1 after it's been loaded with geoJSON data ? Would the new layers also inherit the properties, actions and behaviours set in layer1's onEachFeature: function?
أكثر...