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

When drawing new area or line features or moving existing features, you can use the CTRL and SHIFT keys
to cause the next vertex to be snapped vertically or horizontally relative to the last vertex or moved vertically
or horiztonally compared to the features current location. Hold down the CTRL key to snap vertically, the
SHIFT key to snap horizontally, or both the CTRL and SHIFT keys to snap diagonally.
Un-doing Digitization Operations
During some operations, like drawing new features, you can undo your last placed point by pressing Ctrl+Z.
Displaying Additional Feature Information
Depending on what types of feature are selected and what data is available, additional options may appear on
the option menu that appears when right clicking. These additional options are described below.
Adding Elevation Values from Terrain to Features
Global Mapper User's Manual
If gridded elevation data (i.e. DEMs) is loaded and one or more features is selected, the Apply Elevations from
Terrain Layers to Selected Features option will appear on the right-click option menu. Selecting this option
will add an ELEVATION attribute to each selected point feature containing the elevation value at each point
location from the top-most terrain layer at that location. Any selected line or area features that have a valid
elevation from loaded terrain at each vertex location will have a set of per-vertex elevations added to the
feature containing the elevation at each vertex from the loaded terrain layers.
Generating a 3D Path Profile from a Selected Line or Area Feature
If gridded elevation data (i.e. DEMs) is loaded, the Generate Path Profile From Line option will appear when
a single line or area feature is selected. Selecting this option will display the Path Profile/Line of Sight dialog
with a 3D path profile of the elevations under the path that the selected feature follows. In addition, if the
selected line/area is a 3D feature with per-vertex elevations, those elevations will be displayed as a separate
line on the path profile.
Calculating View Sheds at Multiple Point Locations If gridded elevation data (i.e. DEMs) is loaded, the
Calculate View Sheds at Selected Point(s) option will appear when one or more point features are selected.
Selecting this option will display the View Shed dialog allowing you to setup the parameters for performing a
view shed calculation centered on each selected point feature location.
Calculating Elevation Statistics within Selected Area/Line Features
If gridded elevation data (i.e. DEMs) is loaded and at least one area or line feature is selected, the Calculate
Elevation/Slope Stats for Selected Area/Line(s)... option will appear when right clicking. Selecting this option
will examine the loaded terrain within the selected area feature(s) and, if terrain is found within a selected
area, add MIN_ELEV, MAX_ELEV, AVG_ELEV, STD_DEV_ELEV, MAX_SLOPE, AVG_SLOPE, and
STD_DEV_SLOPE attributes to the area containing the minimum, maximum, average, and standard deviation
of elevation values encountered within the area feature as well as the maximum, average, and standard
deviation of the slope values (in degrees) found within the area. For selected line features, the maximum and
average slope (in degrees), the total elevation gain and loss along the path, and the maximum slope both up
and down the line (assuming travel from the start of the line to the end) for the line will be computed and
added as MAX_SLOPE, MAX_UP_SLOPE, MAX_DOWN_SLOPE, AVG_SLOPE, ELEV_GAIN, and
ELEV_LOSS attributes.
Map GPS Coordinates - GPS Map Coordinates - GPSCoordinates Map 192