From ea346a785dc1b3f7c156f6fc33da634e1f1a627b Mon Sep 17 00:00:00 2001 From: Chris Schlaeger Date: Tue, 12 Aug 2014 21:56:44 +0200 Subject: Adding jquery, flot and openlayers to be included with the GEM. --- misc/openlayers/examples/ordering.html | 221 +++++++++++++++++++++++++++++++++ 1 file changed, 221 insertions(+) create mode 100644 misc/openlayers/examples/ordering.html (limited to 'misc/openlayers/examples/ordering.html') diff --git a/misc/openlayers/examples/ordering.html b/misc/openlayers/examples/ordering.html new file mode 100644 index 0000000..cb15d8e --- /dev/null +++ b/misc/openlayers/examples/ordering.html @@ -0,0 +1,221 @@ + + + + + + + OpenLayers: Z-Ordering and Y-Ordering of Vector Features + + + + + + + +

Z-Index/Y-Order Example

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+ stack, stacking, zindex, ordering, light +

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+ This example shows the use of z-indexing and y-ordering of external graphics. Zoom in and out to see this behavior. +

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Z-Index (with Y-Ordering enabled)

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+ In this map, the gold features all have the same z-index, and the red features have alternating z-indeces. The gold features' z-index is greater than the red features' z-indeces, which is why gold features look to be drawn on top of the red features. Since each gold feature has the same z-index, gold features succomb to y-ordering: this is where features that seem closest to the viewer (lower lattitude) show up above those that seem farther away (higher lattitude). +

+ You can enable y-ordering by passing the parameter yOrdering: true in the vector layer's options hash. For all configurations (with yOrdering or zIndexing set to true), if features have the same z-index -- and if y-ordering is enabled: the same latitude -- those features will succomb to drawing order, where the last feature to be drawn will appear above the rest. +

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Z-Index and Drawing Order (Z-Indexes set, and Y-Ordering disabled)

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+ In this map, zIndexing is set to true. All features are given the same z-index (0), except for the first feature which has a z-index of 1. The layer's yOrdering parameter is set to the default (false). This configuration makes features succomb to z-index and drawing order (for the features with the same z-index), instead of y-order. +

+ The features in this map were drawn from left to right and bottom to top, diagonally, to show that y-ordering is not enabled. Only the lower-left corner feature is drawn on top of the others, because it has a higher z-index (1 instead of 0). +

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