Topo USA User Guide
20
Data Zoom Level—The current data zoom level of the map view; ranges
between 1-0 (maximum zoom out) and 17-0 (maximum zoom in).
Zoom Tools—Buttons that quickly zoom out three levels, out one level, or
in one level. For more information, see
Zooming In and Out
.
Compass Rose—A group of nine buttons on a globe. The outer buttons
have yellow arrows; click one of the arrow buttons to pan the map in that
direction. Click the middle button to center the map on the previous map
view. This button performs an undo function for the last pan or zoom (up
to 256 times).
Map Rotation Tool—The arrow in the graphic indicates True North in
relation to the rotated map. Use the Map Rotation Tool to rotate the map
in any direction. You can rotate the map by clicking or dragging the square
map graphic in the direction you want or by selecting/typing the degree of
map rotation from the drop-down list.
Map Coordinates—Coordinates for the current map cursor position
display based on the
units of measurement preferences
chosen in the
Display tab of the Options dialog box.
Elevation and Interval—Display in the measurement chosen in the
Display tab of the Options dialog box. The data zoom level affects interval
display.
Scale Bar—Indicates the distance one scale bar unit equals in the
measurement chosen under in the Display tab of the Options dialog box.
Overview Map
The overview map is a small map in the lower-right corner of the screen that offers a wide-
angle view of your current map view area. It is approximately three data zoom-levels out
from the current map view.
Tips
•
Click anywhere on the overview map and that point becomes the new map center.
This allows you to travel greater distances with each mouse click than you can within
the larger, current map view.
Summary of Contents for Topo North America
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Page 369: ...Index 355 X XSym 197 198 Z ZIP Postal Codes 60 Zone 303 Zoom Tools 9 19 Zooming In and Out 9 ...