Value-scale generator

for proportional-symbol maps
example image showing parameters of a proportional-symbol scale
i The lowest of the mapped features' values, usually being the lowest value of the mapped attribute field in the attribute table.
 
i The highest of the mapped features' values, usually being the highest value of the mapped attribute field in the attribute table.
 
Symbol shape:
i Size limit of 1 MB is applied. The tool preserves original styles if styled inside the path elements. Otherwise, an universal black stroke and no fill is applied.
i Desired height of the symbol representing the lowest phenomenon value in units specified below. You should set this accordingly to the minimum symbol size defined in the Symbology pane of your GIS.
units
i Desired width (column width or apex-base width) of the onedimensional symbol shapes. You should set this accordingly to the symbol properties defined in the Symbology pane of your GIS.
units
Symbol-size & column-width unit:
i Desired length of the generated scale (distance between the centers of the smallest and largest symbols) in milimeters. You can specify it according to the amount of empty space in your map layout.
mm
i Font size of the labels located below the scale in typographic points. You can define the scale similarly to size of other textual elements in your map layout according to from which distance and by which users the map is expected to be read.
pt
Typographic style:
HIDE OPTIONAL SETTINGS
i Desired phenomenon values divided by semicolons specifying which divisions (potentially labeled) will be included in the values scale. You can use it to add for example an average phenomenon value or divisions differing from those generated automatically.
use semicolon to separate numerals representing values of division lines (e.g. 50; 100; 128.6; 150; 200)
i Number of gaps between short lines dividing regularly the distance between main divisions. You should set this value so that it is easy for a user to estimate more precisely the value represented by any symbol size measured in the map.
/ div.
i Colour fill of the map symbols. Default value will be set if kept empty.
 
i Stroke thickness of the map symbol in points. Default value will be set if kept empty.
pt
i Stroke colour of the map symbols. Default value will be set if kept empty.
 
HIDE SYMBOL EXAMPLES
star
person
tree
house
christmastree
waterdrop
carrot
heart
candle
DOWNLOAD SVG DOWNLOAD PDF
The recently generated result for download: SVG and PDF
Did you find our tool useful? Give us short feedback to know a bit about what maps you design using it. Thanks!
preview of resulting value scale

Description

This tool provides a value scale for map legends of proportional-symbol maps (one of the most frequent types of cartodiagrams). The curve represents a function of phenomenon values on x-axis to respective height of map symbols on y-axis. For all supported 2D symbols (circle, square, triangle, pentagon, hexagon ... all being regular), this function follows the principle that the symbol area is increasing accordingly to the phenomenon value. Flannery appearance compensation is not implemented in the algorithm. For one-dimensional shapes (column and apex), the function is linear resulting in a straight line. You may download your output as vector SVG and PDF files. In case of the SVG output, X-axis is labeled using sans-serif Arial font while in PDF using general sans-serif font. In both cases, the labels are easily editable in a graphic software.
This website use technical cookies to store your inputted parameters before every use of the tool, and so you don't need to change all of them again from the default. No personal details are stored. However, you may delete the stored values and reload default values by hitting the button below. If cookies are disallowed, inputted form values will not be stored for subsequent use.