> This requires a renderer / display set up that allows the use to select >> what features you want and filter out those you don't. >> >> The rendrering engine will require significant enhancement to support >> selectable layers unless I have missed something. >> > > Hi Mick,
Is this the sort of thing you had in mind ( http://maps3.org.uk/tiles/historic_layers.html)? It has a VERY crude filtering of prehistoric / Roman / medieval and 'modern' historic features, and an even rougher rendering of those features. (to do it properly we will need either civlization/period tags, or start/end dates, and spend a lot more time on the presentation than I have!). But, there is a layer switcher on the right hand side of the map where you can select a base map (I used the standard OSM rendering and cycle map, because I thought that if we do it for real, we would want a topographic base layer more than a motorway network?) Each layer is rendered a bit differently so you can see them change when you switch them on and off. Note that I have not rendered much of the map - it will get very slow as you zoom in, because it will start to render the map on demand, and my database seems a bit slow for some reason.... There are obviously lots of improvements - at the very least a link to an editor like we have on the brewmap <http://brewmap.maps3.org.uk>, so you can correct things that are tagged incorrectly, then different icons for different types of features within the layers (they are all the same at the moment). There is a 'how it works' section at the bottom of the map<http://maps3.org.uk/tiles/historic_layers.html>if you are curious about how I have done it. Hope that helps. Graham. -- Graham Jones Hartlepool, UK.
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