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Chart size

Specify chart size with chs=<width in pixels>x<height in pixels>

For example, chs=300x200 generates a chart 300 pixels wide and 200 pixels high.

The largest possible area for all charts except maps is 300,000 pixels. As the maximum height or width is 1000 pixels, examples of maximum sizes are 1000x300, 300x1000, 600x500, 500x600, 800x375, and 375x800.

For maps, the maximum size is 440 pixels wide by 220 pixels high.

Pie charts are clipped (only partially visible) if the size specified is too small. General size guidelines for pie charts are:

• a two-dimensional chart needs to be roughly twice as wide as it is high.
• a three-dimensional chart needs to be roughly two and a half times wider than it is high.

chs 파라미터를 통해 width 와 height 픽셀을 지정합니다.

출처: Google Chart API

URL format

Google Chart API URLs must be in the following format:

http://chart.apis.google.com/chart?<parameter 1>&<parameter 2>&<parameter n>

Note: Each URL must be all on one line.

Parameters are separated with the ampersand (&) character. You can specify as many parameters as you like, in any order. For example, the Chart API returns the following chart in response to the URL below:

http://chart.apis.google.com/chart?
chs=250x100
&chd=t:60,40
&cht=p3
&chl=Hello|World

Where:

• http://chart.apis.google.com/chart? is the Chart API's location.
• & separates parameters.
• chs=250x100 is the chart's size in pixels.
• chd=t:60,40 is the chart's data.
• cht=p3 is the chart's type.
• chl=Hello|World is the chart's label.

You can include a Chart API image in an HTML document by embedding a URL within an <img> tag. For example, the following <img> tag results in the same image as above:

<img src="http://chart.apis.google.com/chart?
chs=250x100
&amp;chd=t:60,40
&amp;cht=p3
&amp;chl=Hello|World"
alt="Sample chart" />


기본 URL: http://chart.apis.google.com/chart
  chs: 차트 사이즈. [width]x[height] ex) chs=200x100
  chd: 차트 데이터
  cht: 차트 타입
  chl: 차트 레이블

PNG 타입의 이미지기 때문에 크기는 6 KB 정도밖에 안되네요

출처: Google Chart API