eth-datamaps

Datamaps
======


#### Interactive maps for data visualizations. Bundled into a single Javascript file.

Datamaps is intended to provide some data visualizations based on geographical data. It's SVG-based, can scale to any screen size, and includes everything inside of 1 script file.
It heavily relies on the amazing D3.js library.

Out of the box it includes support for choropleths and bubble maps (see demos), but it's not limited to just that. Its new plugin system allows for the addition of any type of visualization over the map.

##### For feature requests, open an issue!

##### Contribution Guideliness

#### Demos at http://datamaps.github.io

---

Downloads:

- World map (94kb, 36.7kb gzip'd)
- USA only (35kb, 13.9kb gzip'd)
- USA & World (131kb, 47.1kb gzip'd)
- No preset topojson (6.8kb, 2.3kb gzip'd)

$3

#### Getting Started

1. Include D3.js and Topojson on your page
2. Include Datamaps.js on your page
3. Add a container, set the height and width and position to relative
4. Create a new Datamaps(options), passing in at least an element option

Example:
``html





#### via NPM
1. npm install datamaps
2. Refer to file in dist directory, like:

`html





1. bower install datamaps
2. Refer to file in dist directory, like:

`html





#### USA Only Map
A map of the USA with an Albers based projection will be default if you only include datamaps.usa.min.js, but in case you include datamaps.all.min.js:
`html

`

#### Changing the default fill colors
`html

`

#### Disabling popup or hover effects
`html

`

#### Using custom maps
`html

`

By specifying a dataUrl, Datamaps will attempt to fetch that resource as TopoJSON.

If you are using a custom map, you'll probably want to specify your own setProjection method as well.

setProjection takes 2 arguments, element as a DOM element, options as the original options you passed in. It should return an object with two properties: path as a d3.geo.path, projection as a d3.geo.projection

The example above will result in albersUsa projection.

!custom UK based data

Read about other D3.js projections

Read more about TopoJSON

$3

india.html
`
var bubble_map = new Datamap({
element: document.getElementById('india'),
scope: 'india',
geographyConfig: {
popupOnHover: true,
highlightOnHover: true,
borderColor: '#444',
borderWidth: 0.5,
dataUrl: 'https://rawgit.com/Anujarya300/bubble_maps/master/data/geography-data/india.topo.json'
//dataJson: topoJsonData
},
fills: {
'MAJOR': '#306596',
'MEDIUM': '#0fa0fa',
'MINOR': '#bada55',
defaultFill: '#dddddd'
},
data: {
'JH': { fillKey: 'MINOR' },
'MH': { fillKey: 'MINOR' }
},
setProjection: function (element) {
var projection = d3.geo.mercator()
.center([78.9629, 23.5937]) // always in [East Latitude, North Longitude]
.scale(1000);
var path = d3.geo.path().projection(projection);
return { path: path, projection: projection };
}
});
`
###### Set the correct projection for India map on world map with the help of Longitude and Latitute of India (you can google it India Longitude and Latitute)
Please use india.toto.json for India geopraphy json data from https://github.com/Anujarya300/bubble_maps/blob/master/data/geography-data/india.topo.json, otherwise your map wont work. (I have truncated IND. from all state ISO code(2-digit ISO code), e.g IND.JH for Jharkhand state truncated to JH)  

Please note in setProjection method, I have set [78.9629, 23.5937] to locate center point for India in the world map. That means
Latitude = 78.9629 E and Longitude = 23.5937 N. Remember Latitute and Longitude are always East and North. For western countries, Latitude are in West so make it convert as Negative of East. e.g 102.3421 W ==> -102.3421 E.

$3

canada.html
`
var bubble_map = new Datamap({
element: document.getElementById('canada'),
scope: 'canada',
geographyConfig: {
popupOnHover: true,
highlightOnHover: true,
borderColor: '#444',
borderWidth: 0.5,
dataUrl: 'https://rawgit.com/Anujarya300/bubble_maps/master/data/geography-data/canada.topo.json'
//dataJson: topoJsonData
},
fills: {
'MAJOR': '#306596',
'MEDIUM': '#0fa0fa',
'MINOR': '#bada55',
defaultFill: '#dddddd'
},
data: {
'JH': { fillKey: 'MINOR' },
'MH': { fillKey: 'MINOR' }
},
setProjection: function (element) {
var projection = d3.geo.mercator()
.center([-106.3468, 68.1304]) // always in [East Latitude, North Longitude]
.scale(250)
.translate([element.offsetWidth / 2, element.offsetHeight / 2]);

var path = d3.geo.path().projection(projection);
return { path: path, projection: projection };
}
});
`
###### Set the correct projection for Canada map on world map with the help of Longitude and Latitute of Canada (you can google it Canada Longitude and Latitute)

Please use canada.toto.json for India geopraphy json data from https://github.com/Anujarya300/bubble_maps/blob/master/data/geography-data/canada.topo.json, otherwise your map wont work. (I have truncated CA. from all state ISO code(2-digit ISO code), e.g CA.TN to TN)

Please note in setProjection method, I have set [-106.3468, 68.1304] to locate center point for Canada in the world map. That means
Latitude = 106.3468 W and Longitude = 68.1304 N. Remember Latitute and Longitude are always East and North. For western countries, Latitude are in West so make it convert as Negative of East. e.g 102.3421 W ==> -102.3421 E.

*You can adjust this latitude and longitude co-ordinates by minor changing.
e.g, if your map is not showing full view of North then you can change 68.1304 N to 70.3200 N or 71.3200 etc.
if your map is not showing full view of East then you can change 32.1304 E to 70.3200 E or 30.3200 etc.*

More about other countries maps

#### Creating a Choropleth

Probably the most common type of map visualization, where different states or countries are color coded.
!US election map, example of a choropleth

You'll need to know the 2 letter state code ('NY' for New York) or the 3 letter country code ('SCT' for Scotland) to fill in areas.
`html

`

This will draw a world map and fill in IRL (Ireland) with the corresponding fills.LOW and USA with fills.MEDIUM.

You can also use fill: color for each state if you don't want to define a fillKey.

Colors will be applied in this order: fillKey, fill, defaultFill.

#### Updating a choropleth after initial drawing
`javascript
map.updateChoropleth({
USA: {fillKey: 'LOW'},
CAN: '#0fa0fa'
});
`

You can specify either a literal color (as a string), or an object with a fillKey property.


#### Resetting a choropleth to defaultFill

The following will reset the entire map to the defaultFill and update CA to be filled green.
`js
map.updateChoropleth({CA: 'green'}, {reset: true})
`

The following will reset the entire map to defaultFill
`js
map.updateChoropleth(null, {reset: true})
`

The following will reset the entire map to defaultFill, but update the corresponding data of NY.
`js
map.updateChoropleth({NY: {numberOfVoters: 55452}}, {reset: true})
`

You can also add a map legend with the legend plugin (used above)

#### Choropleth with auto-calculated color

Example highmaps_world.html explains how to create colorized map based on some quantity of things, Live Demo

Example result:

!auto calculated color

#### Custom popup on hover

Expanding on the previous example of using data, any property passed into data will be sent to the popupTemplate function, which can be override to display custom messages.
`html

`

geographyConfig.popupTemplate, bubblesConfig.popupTemplate and arcConfig.popupTemplate just needs to return an HTML string, so feel free to use Handlebars or Underscore templates (instead of the terrible Array.join method above).


#### Bubbles
Bubbles in a core plugin that will render circles('bubbles') on different parts of the map. Each of these bubbles can be color coded in the same way a choropleth is color coded (see above 'Choropleth' example).
`js
var bombMap = new Datamap({
element: document.getElementById('map_bombs'),
scope: 'world',
geographyConfig: {
popupOnHover: false,
highlightOnHover: false
},
fills: {
'USA': '#1f77b4',
'RUS': '#9467bd',
'PRK': '#ff7f0e',
'PRC': '#2ca02c',
'IND': '#e377c2',
'GBR': '#8c564b',
'FRA': '#d62728',
'PAK': '#7f7f7f',
defaultFill: '#EDDC4E'
},
data: {
'RUS': {fillKey: 'RUS'},
'PRK': {fillKey: 'PRK'},
'PRC': {fillKey: 'PRC'},
'IND': {fillKey: 'IND'},
'GBR': {fillKey: 'GBR'},
'FRA': {fillKey: 'FRA'},
'PAK': {fillKey: 'PAK'},
'USA': {fillKey: 'USA'}
}
});

var bombs = [{
name: 'Joe 4',
radius: 25,
yield: 400,
country: 'USSR',
fillKey: 'RUS',
significance: 'First fusion weapon test by the USSR (not "staged")',
date: '1953-08-12',
latitude: 50.07,
longitude: 78.43
},{
name: 'RDS-37',
radius: 40,
yield: 1600,
country: 'USSR',
fillKey: 'RUS',
significance: 'First "staged" thermonuclear weapon test by the USSR (deployable)',
date: '1955-11-22',
latitude: 50.07,
longitude: 78.43

},{
name: 'Tsar Bomba',
radius: 75,
yield: 50000,
country: 'USSR',
fillKey: 'RUS',
significance: 'Largest thermonuclear weapon ever tested—scaled down from its initial 100 Mt design by 50%',
date: '1961-10-31',
latitude: 73.482,
longitude: 54.5854
}
];
//draw bubbles for bombs
bombMap.bubbles(bombs, {
popupTemplate: function (geo, data) {
return ['

The first parameter to bubbles should be an array of objects, each with at least 3 properties:

- latitude
- longitude
- radius

Optionally, pass in fillKey to color code the bubble, and pass in any other data you want to render in a popup template which can be overridden in the options parameter.

For further customization, you can set these properties on each bubble to override the options parameter (or default options):

- borderColor
- borderWidth
- borderOpacity
- fillOpacity

The second parameter is the options param, where you can override any of the default options (documented below)


#### Live updating of bubbles
You can continue to call bubbles on the same map instance and the map will auto update itself. Any bubble previously drawn that's not included in subsequent calls will be removed from the UI.

map.bubbles([]) will erase all bubbles.


#### Labels

For USA maps you can add 2 letter (i.e., NY, TX) labels to each state. To add labels, after created the map:

`javascript
map.labels();
`

The following options are allowed:

- labelColor // Font color, default: #000
- lineWidth // Line width for New England states, default: 1
- fontSize // Font size, default: 10
- fontFamily // Font family, default: 'Verdana'
- customLabelText // Replaces 2 letter labels with custom

An example for using the options:

`javascript
map.labels({labelColor: 'blue', fontSize: 12});
`

An example for using the customLabelText

This accepts an object whose keys are uppercase 2 letter state codes.
Values will be substituted for default label text
Any missing values default to 2 state letters
`javascript
newLabels = {'AK':'Alaska', 'AL':'123',.......};
map.labels({'customLabelText': newLabels});
`
Example custom-labels.html for using the customLabelText

!custom labels

#### Zooming

You can override the default projection by setting your own setProjection(element) function.
Example here

`javascript
var map = new Datamap({
scope: 'world',
element: document.getElementById('container1'),
setProjection: function(element) {
var projection = d3.geo.equirectangular()
.center([19, -3])
.rotate([4.4, 0])
.scale(400)
.translate([element.offsetWidth / 2, element.offsetHeight / 2]);
var path = d3.geo.path()
.projection(projection);

return {path: path, projection: projection};
},
`

#### Using with jQuery
If jQuery is present on the page when the Datamaps library loads, it'll automatically create a jQuery plugin called datamaps that can be used like:
`html

`

#### Events
All events are bubbled up to the root svg element and to listen to events, use the done callback.

`html

`

#### Responsive Maps
Set responsive to true and then listen for resize events on window, and call Datamaps.prototype.resize.

Avoid setting the height and width of the container with hard pixel values, instead use percent values. (use 50% instead of 500px.

If the aspect ratio of your custom map is not the default 16:9 (0.5625), you should use the aspectRatio option to set it appropriately (eg. 0.3 for a 3:1 aspect ratio).

`html


#### Default Options
`js
{
scope: 'world', // Currently supports 'usa' and 'world', however with custom map data you can specify your own
setProjection: setProjection, // Returns a d3 path and projection functions
projection: 'equirectangular', // Style of projection to be used. try "mercator"
height: null, // If not null, datamaps will grab the height of 'element'
width: null, // If not null, datamaps will grab the width of 'element',
responsive: false, // If true, call resize() on the map object when it should adjust it's size
done: function() {}, // Callback when the map is done drawing
fills: {
defaultFill: '#ABDDA4' // The keys in this object map to the "fillKey" of [data] or [bubbles]
},
dataType: 'json', // For use with dataUrl, currently 'json' or 'csv'. CSV should have an id column
dataUrl: null, // If not null, datamaps will attempt to fetch this based on dataType ( default: json )
geographyConfig: {
dataUrl: null, // If not null, datamaps will fetch the map JSON (currently only supports topojson)
hideAntarctica: true,
hideHawaiiAndAlaska : false,
borderWidth: 1,
borderOpacity: 1,
borderColor: '#FDFDFD',
popupTemplate: function(geography, data) { // This function should just return a string
return '<div class="hoverinfo"><strong>' + geography.properties.name + '</strong></div>';
},
popupOnHover: true, // True to show the popup while hovering
highlightOnHover: true,
highlightFillColor: '#FC8D59',
highlightBorderColor: 'rgba(250, 15, 160, 0.2)',
highlightBorderWidth: 2,
highlightBorderOpacity: 1
},
bubblesConfig: {
borderWidth: 2,
borderOpacity: 1,
borderColor: '#FFFFFF',
popupOnHover: true, // True to show the popup while hovering
radius: null,
popupTemplate: function(geography, data) { // This function should just return a string
return '

* Do not run the grunt build task or submit any built files in your PR.
* Have an example in src/examples if adding a new feature. Copy an existing feature .html` file to start.