Open Printable/Searchable Copy - Global Mapper

You can run a Global Mapper script file automatically be passing it on the command line to the Global
Mapper .exe file. The script file will be run with no user interface displayed and Global Mapper will
immediately exit when the script file completes processing. This allows you to easily run Global Mapper
scripts from another application or from a DOS batch file. Note that your script files need to have an extension
of .gms for this to work.
Comments
Any lines that begin with the forward slash character (/) are considered comments and are ignored by the
script processing engine. This means that you can use C or C++ style comments like // or /* at the start of your
line.
ADD_MEASURE_ATTRS
The ADD_MEASURE_ATTRS command allows you to add/update feature measure attributes to all of the
line and area features in a loaded vector layer.
The following parameters are supported by the command:
• FILENAME - filename of the layer to update. If an empty value is passed in, all layers that were
created by the script, such as those from a GENERATE_CONTOURS command, will be updated.
You can also pass in the value 'USER CREATED FEATURES' when running a script in the context
of the main map view or loading a workspace to have the 'User Created Features' layer updated.
CALC_ATTR
Global Mapper User's Manual
The CALC_ATTR command allows you to calculate a new attribute value (or update the value for an existing
attribute) for features in a layer based on a source attribute (including things like the feature label or type) and
a second value. The second value can be a specified string or number, or the value from another attribute of
the feature.
The following parameters are supported by the command:
• FILENAME - filename of the layer to update. If an empty value is passed in, all loaded vector layers
will be updated. You can also pass in the value 'USER CREATED FEATURES' when running a
script in the context of the main map view or loading a workspace to have the 'User Created Features'
layer updated. If you don't pass anything in all vector layers will be operated on.
• TYPE - specifies what type of operation to use when assigning the new attribute value.
♦ COPY - copies the source attribute value into the new attribute
♦ ADD - numerically adds the second value to the source value and saves the result into the
new attribute
♦ SUBTRACT - numerically subtracts the second value from the source value and saves the
result into the new attribute
♦ MULTIPLY - numerically multiplies the second value by the source value and saves the
result into the new attribute
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