60 lines
2.6 KiB
Markdown
60 lines
2.6 KiB
Markdown
---
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title: Us State Map Visualization Using D3js
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---
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## Project Explanation:
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**We have the sample data of US States:** Number of serious accidents reported for every state in US.
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_We have this data in three categories:_ Lowest reported number for a month, Average reported accidents in a year and Highest number reported in a month, as showed in below sample data.
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We want to draw a US Map and visualize this data such that, when we hover mouse over a state, it should show this data for that particular state.
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## Sample Data:
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`AZ: 13 41 57`
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`CA: 41 60 81`
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`NY: 6 35 54` and so on.
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## Hints and Resources:
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### Step by Step instructions:
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* First , we will need to create a US map.
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1. You can either create a map from scratch using sources like - <a href='https://intridea.github.io/stately/' target='_blank' rel='nofollow'>Stately.</a>
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2. Get a already created map from <a href='http://freehtml5maps.com' target='_blank' rel='nofollow'>freehtml5maps</a> or use this <a href='http://bl.ocks.org/NPashaP/raw/a74faf20b492ad377312/3513ad985b2fa93ea35f2fc864cb30540c298171/uStates.js' target='_blank' rel='nofollow'>Javascript</a>
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* Add your map to the main javascript used for visualization
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For Example, `(script src="uStates.js")(/script) (!-- creates uStates. --)`
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* Create Div tag to hold tooltip and create SVG to hold you map.
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For Example,
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`javascript
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(div id="tooltip")(/div)
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(svg width="960" height="600" id="statesvg")(/svg)`
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* Create Tooltip function to create html content string in tooltip div.
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This tooltip function will return a table and this table will be shown whenever we hover mouse over the state Table should be something like this ( As shown in the first figure) : Arizona Low 13 Average 41 High 57
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* Draw states on id (#statesvg in our example ) with data and tooltip function.
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For example, `uStates.draw("#statesvg", sampleData, tooltipFunc);`
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**Final output will be something like this: ( Hovered the mouse over California )**
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## References:
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1. <a href='https://d3js.org' target='_blank' rel='nofollow'>**D3.js**</a> Examples and Documentations.
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2. <a href='https://github.com/NPashaP' target='_blank' rel='nofollow'>**NPashaP GitHub**</a>
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3. <a href='https://intridea.github.io/stately/' target='_blank' rel='nofollow'>**Stately**</a>
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4. <a href='http://freehtml5maps.com' target='_blank' rel='nofollow'>**FreeHTML5Maps**</a>
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