Open Printable/Searchable Copy - Global Mapper

Global Mapper User's Manual
degree values in the formats DDMMSS.S and DDMM.M.
The Coordinate Delimeter section allows the user to specify what character the coordinates are separated by
on coordinate lines. If the Auto-Detect option is selected, Global Mapper will attempt to automatically
determine the coordinate delimeter. This option will usually work and should probably be used unless you
have trouble.
The Coordinate Line Prefix section allows the user to specify whether coordinates start at the beginning of the
line or if coordinate lines start with some other sequence of characters. For example, some formats may start
coordinate lines with the sequence "XY,".
The Rows to Skip at Start of File setting controls how many lines to skip at the start of the file before trying to
extract data. This is useful if you have some header lines at the start of your file that you want to skip over.
The Feature Classification section allows the user to specify what feature type to assign to area, line, and
point features imported from the file.
If the Include attributes from lines with coordinate data option is selected, any text found AFTER the
coordinate data on a line from the file will be including as attribute for the feature that coordinate is in. If not
selected, only lines from the file that are not determined to contain coordinate data will be used as attributes.
If you are doing a Point Only import and the Column Headers in First Row of File option is checked, values
in the first line from the file will be used at the names of attributes for attributes found in coordinate data lines.
This is useful for things like CSV files.
If the Treat 3rd coordinate value as elevation option is selected and a numeric value is found immediately
following the x and y (or lat and lon) coordinate values, that value will be treated as an elevation. Otherwise,
the value will be included as an attribute if the Include attributes from lines with coordinate data option is
selected. Typically you want to leave this option checked unless you are importing point data in which the 3rd
column is an attribute that occasionally contains all numeric values, such as well names.
If you have line and/or area data that do not have non-coordinate lines separating them but rather are delimited
by a change in a particular field/column of data, you can use the Break Line/Area Features on Change in
Field option to specify which field (use a 1-based index) to check for breaking the data into separate line/area
features.
Pressing the Select Coordinate Offset/Scale button displays a dialog that allows the user to select an offset and
scale factor to apply to each coordinate. The offset entered will first be added to each coordinate, and then
each coordinate will be multiplied by the scale factor.
When generic ASCII text files are imported, Global Mapper will scan the attributes associated with each
feature and look for any attribute names that are known to it. The following is an abbreviated list of attribute
names that are currently recognized by Global Mapper when generic ASCII text files are read (see the links
below the list for more complete lists):
• NAME or LABEL - the value associated with an attribute of either of these names will be used as the
feature name.
• DESC, DESCRIPTION, LAYER, or TYPE - the value associated with an attribute of any of these
names will be used as the feature description.
• GM_TYPE - the value associated with an attribute with this name or any of the description names
listed above will be used to attempt to assign a classification other than the default for each feature.
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