[[PageOutline]]

This page is one of the !MapGuide Community CodeSamples.  Visit the CodeSamples page to view more!

This sample script contains a series of utility functions to batch update a series of Layer Definitions in a folder to conform to a specified minimum/maximum scale range.

=== How to use this script ===

 1. Launch MapGuide Maestro
 2. In the '''IronPython''' console, click '''Run File'''
 3. Browse to '''scale_ranges_utils.py''' and click '''Open''' to load this script

Once loaded, you will have the following functions available for you to use from the IronPython console:

{{{
#!python
def FixScaleRangesMinMax(conn, folder, min, max):
    """
    Modifies the first scale range of all Layer Definitions under the specified folder to the specified
    minimum and Mmximum scales
    """
def FixScaleRangesZeroToMax(conn, folder, max):
    """
    Modifies the first scale range of all Layer Definitions under the specified folder to the specified
    maximum scale. The minimum scale is un-set (ie. Set to 0)
    """
def FixScaleRangesMinToInfinity(conn, folder, min):
    """
    Modifies the first scale range of all Layer Definitions under the specified folder to the specified
    minimum scale. The maximum scale is un-set (ie. Set to infinity)
    """
def FixScaleRangesZeroToInfinity(conn, folder):
    """
    Modifies the first scale range of all Layer Definitions under the specified folder to [0, Infinity]
    """
}}}

To modify all layers under {{{Library://Samples/Sheboygan/Layers/}}} to have a scale range of 50 to 12000, you would run the following snippets in your IronPython console. This assumes a session with only one active site connection:

{{{

>>> conn = app.GetConnection(app.GetConnectionNames()[0])
>>> FixScaleRangesMinMax(conn, "Library://Samples/Sheboygan/Layers/", 50, 12000)

}}}

This will output something similar to this:

{{{

Fixing: Library://Samples/Sheboygan/Layers/CityLimits.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/CityLimits.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Buildings.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Buildings.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Districts.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Districts.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Hydrography.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Hydrography.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Islands.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Islands.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Parcels.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Parcels.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Roads.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Roads.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Tracks.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Tracks.LayerDefinition
Fixing: Library://Samples/Sheboygan/Layers/Trees.LayerDefinition
Scale range set to [50, 12000]
Saved: Library://Samples/Sheboygan/Layers/Trees.LayerDefinition
>>> 

}}}

=== Limitations ===

This only operates on the first scale range it finds of each Layer Definition in the folder you specify.