Map Grid/Graticule Parameters
Option on map toolbar or
by right clicking on map window. This
can give you up to 5 grids:
Lat/long graticule, primary datum
Lat/long graticule, secondary datum. You can only see this if the
pixel spacing on the map is less than the datum shift.
UTM grid, primary datum This will not appear until the map is
sufficiently large scale.
UTM grid, secondary datum. You can only see this if the pixel spacing
on the map is less than the datum shift. The shift in UTM is different
than in geographic coordinates.
The projection's native grid, helpful for systems like SPCS or the conic
You can set the color and line width for each to try to differentiate.
However, these are designed to allow you to display the correct, single grid,
and for educational purposes to see the relationships of the different grids.
Window allows you to modify parameters of the grid on
the map. You can:
- Select UTM grid, lat/long graticule, both, or
- Select grids to show
- Primary datum grid.
- Secondary datum grid will be
plotted. The datum for the main grids is selected in the
form (Datum tab). The secondary datum only can be changed on
this form. To change the primary datum you must close the
map window, select the new primary datum in the Options
from (Datum tab) and then reopen the map window.
- Native grid: for a DEM that uses an external projection
file, such as UK OS grid or
- UTM grid settings
- Pick the maximum screen pixel size for the UTM grid, in meters. If
you want something at much smaller scales, use
Map projection zone
- Grid spacing.
- Lat/long graticule settings
- Labels inside map. This will use less space for the map compared
to putting in the margin, but can overprint important map information.
- Pick grid color and line weight for primary and
- Pick intervals for both of the grids.
- Change secondary datum.
- Label KML--create a point shapefile, as a separate layer, with grid
labels for KML export.
- Short UTM: the labels can either be the full UTM, or just the two digit
short form. The short form might be more legible on the Google Earth
- KML export: exports grid/graticule to Google Earth.
Grid Gallery--options illustrated
Last revised 4/5/2021