A tool that helps extract data from analog map.
GitHub: https://github.com/YujiSODE/dataMappingGuide

Copyright (c) 2018 Yuji SODE <[email protected]>
This software is released under the MIT License.
See LICENSE or http://opensource.org/licenses/mit-license.php

• dataMappingGuide.js

var obj=dataMappingGuide(canvas,src);
This function returns an object with some methods to control.

• canvas: a canvas element
• src: an optional filename or pathname of an image for background

• resize(w,h,src); it sets canvas size and background image
• setDivisions(x,y); it sets horizontal and vertical divisions
  • w and h: new values for canvas width and canvas height
  • src: filename or pathname of an image; 'none' is default value
  • x and y: numbers for horizontal and vertical divisions

• setColor(rgb,alpha); it sets rgb color and alpha value
  • rgb: rgb color value
  • alpha: an optional value between 0.0 (fully transparent) and 1.0 (fully opaque)

• xy(x,y); it puts focus on a area that is specified using integer coordinates
  • x and y: positive integer indices for horizontal and vertical divisions

An example of 3x3 divided focus area:
_|1|2|3|
1|x|x|x|
2|x|x|x|
3|x|x|x|