Map GPS Coordinates - GPS Map Coordinates ... - Global Mapper

Global Mapper User's Manual
• Elevation Grid - All lines from the file which are determined to contain 3D coordinate data will be
use generated a triangulated terrain which is then gridded to create a elevation grid. This grid has all
the capabilities of an imported DEM, including contour generation, line of sight and view shed
analysis, and raster draping. When selecting this option, the Create Elevation Grid dialog will appear
after setting up the ASCII file import options to allow setting up the gridding process.
The Coordinate Column Order section allows the user to specify in what order the coordinates are found on
coordinate lines in the file. Coordinates can either be x followed by y (i.e. longitude then latitude) or the
reverse. Elevation values, if any, are always assumed to come after the x and y values. The Fields to Skip at
Start of Line setting controls what field index (column) the coordinates start in. For example, if the x and y
coordinates are in the 3rd and 4th columns, set this value to 2 so that the coordinates will be grabbed from the
appropriate place.
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.
Map GPS Coordinates - GPS Map Coordinates - GPS Coordinates Map 11