Hi Dave,
How big is your file (or how many features are in it?). When you use
the Shape file version, are you using the ShapeLayer(which re-reads
the file every projection change to only hold the features needed for
the map) or BufferedShapeLayer (which reads the entire file and holds
the contents in memory)? The MIFLayer should have similar
performance to the BufferedShapeLayer, however.
Depending on the number of features in your file and the scales you
want to be able to use the data, you might have to implement some
filtering in the layer to only display the features that make sense
at different scales.
- Don
On Feb 22, 2006, at 8:05 AM, Dave Brown wrote:
> Hi All,
>
>
> I was wondering If anyone has general performance advice for using
> openMap.
>
> Just started using it and decided to start off by expanding the
> simplemap
> program.
>
> So all I'm doing is loading my own shapefile, a street map of cairo
> but am
> dissapointed with the delay in display. Each time I either move or
> zoom
> there is a 1-5 second delay.
>
> I've wondered whether it was the shapefile performance, so tried
> MIF but
> there is no difference really.
>
>
> Is there a recommended format or any general tips you can give to
> ensure
> immediate response in the UI.
>
> I'll post my code here just in case anyone can spot any areas I can
> immediately optimise..
>
> Thanks in advance, Dave.
>
> Code :
>
> MapPanel mapPanel = new BasicMapPanel();
> MapHandler mapHandler = mapPanel.getMapHandler();
> mapHandler.add(frame);
> // Get the default MapBean that the BasicMapPanel created.
> MapBean mapBean = mapPanel.getMapBean();
>
> // Set the map's center & scale
> mapBean.setCenter(new LatLonPoint(30.0599f, 31.25f));
> mapBean.setScale(120000f);
>
> mapHandler.add(new LayerHandler());
>
> // ADD MIF Layer
> Properties mifLayerProps = new Properties();
> MIFLayer mifLayer = new MIFLayer();
> mifLayerProps.put("mifFile",
> "C:/Development/supernav/Cairo_Streets.MIF");
> mifLayer.setProperties(mifLayerProps);
> mifLayer.setVisible(true);
> mapHandler.add(mifLayer);
>
> mapHandler.add(new GraticuleLayer());
> //mapHandler.add(routeLayer);
>
> // Create the directional and zoom control tool
> OMToolSet omts = new OMToolSet();
> // Create an OpenMap toolbar
> ToolPanel toolBar = new ToolPanel();
> mapHandler.add(omts);
> mapHandler.add(toolBar);
>
> // Display the frame
> frame.setVisible(true);
>
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Received on Wed Feb 22 2006 - 13:17:50 EST