RE: [OpenMap Users] DCW Map Scale

From: Yesberg, John <>
Date: Fri, 23 Mar 2007 10:14:49 +1030

>From the javadoc for com.bbn.openmap.layer.vpf .VPFLayer
   # NOTE: The features
   # have to be added to the map and visible (proper scale setting <
   # in order for the palette controls to be visible.

The default is actually 31,000,000 (set in com.bbn.openmap.layer.vpf
    /** cutoff scale for browse coverage. */

    public final static int DEFAULT_BROWSE_CUTOFF = 31000000;


This is done because when you zoom out too much, the layer would try to
render everything, and it gets too slow.
An example of the code (in that does this:
    if (scale < BROWSE_CUTOFF) {

       CoverageTable c = cat.getCoverageTable(covname);

        /* various error checking code omitted for this email */

       c.drawFeatures(warehouse, ll1, ll2, dpplat, dpplon);



You can provide the "cutoffScale" property to adjust this:
I don't know about the area fill color bleeding.
John Yesberg.


[] On Behalf Of
        Sent: Friday, 23 March 2007 6:22 AM
        To: ''
        Subject: [OpenMap Users] DCW Map Scale

        Utilizing OpenMap 4.6.3 and vmap data downloaded from we have noticed that when we scale above
1:30,000,000 the map disappears. The shape file layer is fine at this
scale, but using older vmap map data (circa 1992) the map does not
disappear above 1:30,000,000, but with this older data and 4.6.3, the
area fill color bleeds outside the borders. Is either situation a known
bug, or is there some setting in properties that I can play around with?


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Received on Thu Mar 22 2007 - 20:00:58 EDT

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