San Vicente map MapGazer – Using the Scale


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Using marks:
   Mark properties

Using the Scale

Using icons

Using transparency

General settings

Getting maps

Elevation data

Coordinate formats

GPX files

Command line


Scale screenshot

Scale screenshot

The Scale is shown in a window to give an immediate visual indication of physical distances on the map shown. It indicates a distance (for example, 500 m) as measured at the centre of the displayed map view. For specific distance measurements, especially if not in a straight line, use a Route.

The units used for the Scale are the first units shown under Settings→Measurements units; you can change which is first in this list (see General settings for details).

You can hide the Scale from its pop-up (right-click) menu or from Settings→Scale settings→Show Scale; to display it again right-click on the map and select Show Scale (or again use Settings→Scale settings→Show Scale).

The Scale is automatically hidden if the zoom level is less than 5 (because the actual scale will vary too much over a typical view in this case). At these lower zoom levels, use a Route for measuring distances – Routes will show the great circle distance between two points.

To change the Scale position, left-click on it and drag it to a new position. This is relative to the bottom-left corner of the window and applies to all windows. You can reset it to its default position by clicking Reset Scale position from its pop-up or from Settings→Scale settings. It will also be reset to its default position if the window size is changed so that no part of the Scale would be visible.

The width of the Scale is automatically adjusted so the Scale indicates a ‘round number’ distance, that is, 1, 2, 2.5, or 5 times a power-of-ten multiple of the selected unit (km, miles, or Nautical miles, or metres or yards for shorter scales).

Scale properties dialog

Scale properties dialog

You can change the Scale width and colour by clicking Scale properties from its pop-up or from Settings→Scale settings. This has two controls:
  • A slider that sets the target minimum width (this is a percentage of the window width, and is at most 50% because the ‘round number’ algorithm can double its width; similarly there is a non-zero minimum width when displayed in order to allow room for the scale and its distance marking).
  • A Pick colour button that takes you to a standard ‘colour picker’ dialog for changing the colour of the scale.
There is also a Reset button that resets the width and colour to the defaults.

To change the transparency of the Scale, use the transparencies dialog (e.g., press ‘t’). In that dialog, the Scale slider adjusts the transparency of the coloured scale bar and the Status slider adjusts the transparency of the background of the distance label (to match that of any displayed status).

Scales in images

The Scale is also used when you create an image from a map (see Using Areas for details). Whenever you Save area as image from an Area’s pop-up menu the Scale, unless hidden, will be included in the image with the same position relative to the bottom-left corner as it is shown in a window, and with the same properties (target width and colour) and transparencies.

MapGazer and these web pages were written by Mike Cowlishaw; Please send me any corrections, suggestions, etc.
All content © Mike Cowlishaw, 2014–2017, except where marked otherwise. All rights reserved. The pages here, and the MapGazer program, are for non-commercial use only. Privacy policy: the Speleotrove website records no personal information and sets no ‘cookies’. However, statistics, etc. might be recorded by the web hosting service.

This page was last updated on 2017-01-20 by mfc.