Autodesk 15606-011408-9320 - MAP R6.3 CPU MODEL-UPG 4/5 MIN 2 CPUS INITL, Руководство пользователя

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Setting Style Properties for Layers
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Specifying Display Ranges for Layer Styles
You use the Display Ranges area on the Styles tab to specify the visible display
range for the current style set. The other options on the Styles tab determine
how the layer displays in the map window when the map’s zoom level is
within the display range currently shown in the Display Ranges box.
When the current zoom level of Autodesk MapGuide Author or Autodesk
MapGuide Viewer is within the visible display range of a particular layer, the
program redraws that layer as specified in the associated style set.
Most map layers have only one style set, but multiple style sets can be useful
for some polyline map layers. In the table below, three different display
ranges, each with its own set of styles, are set up to display major roads. Using
these ranges and styles, Autodesk MapGuide Author draws the roads with
heavier line styles as the zoom increases.
When setting up multiple style sets for a layer, make sure that the display
ranges do not conflict. For example, the ranges 500,000 - 5,000,000 and
2,000,000 - 10,000,000 conflict, because the second range overlaps the first
one. In such cases, when the current map scale is within the overlapping
display range, Autodesk MapGuide Author displays the features using the
styles of the first style set in the list only.
Keep in mind that the style set will be used if the current map scale is greater
than the From value and less than or equal to the To value. For example, if the
display range is 0 - 20,000, the style set will be used if the current map scale
is between 1 and 20,000. Therefore, when setting up adjacent display ranges,
you should use the same From value as the previous style set’s To value. Do
not set one range to 0 - 20,000 and then set the next range to start at 20,001.
Display Range Styles Used To Draw the Road
0 - 20,000
20,000 - 50,000
50,000 - 100,000
Online Help Index
display ranges