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Use Baidu map JSAPI to generate the h7n9 Avian Influenza distribution chart implementation code

Source: Internet
Author: User
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An example of the H7N9 infection distribution chart generated using Baidu map JSAPI. The data is from xinhuanet (No. 4.8), as shown below:

The list of functions used is as follows:
1. Customize the copyright control function, that is, (1) the corresponding data source section. The Code is as follows: Copy codeThe Code is as follows: var cr = new BMap. CopyrightControl ({anchor: BMAP_ANCHOR_TOP_RIGHT });
Map. addControl (cr); // Add a copyright control
Var bs = map. getBounds ();
Cr. addCopyright ({id: 1, content: "<a href = 'HTTP: // your style = 'fontfamily:; font-size: 18px; background: white '> H7N9 data source </a> ", bounds: bs });

2. Obtain the administrative boundary function, that is, the border of the four provinces and cities corresponding to (2). The Code is as follows:Copy codeCode: var bdary = new BMap. Boundary (); // administrative Boundary service
Var length = data. length;
For (var index = 0; index <length; index ++)
{
(Function (index) {// closure usage
Bdary. get (data [index]. city, function (rs) {// obtain the Administrative Region
Var count = rs. boundaries. length; // The administrative area consists of several polygon.
Var bounds;
Var center;
For (var I = 0; I <count; I ++ ){
Ply = new BMap. polygon (rs. boundaries [I], {strokeWeight: 2, strokeColor: data [index]. color, fillColor: data [index]. color, fillOpacity: 0.8}); // create a polygon covering.
If (! Bounds) // obtain the central point of the first part of the administrative area
{
Center = ply. getBounds (). getCenter ();
}
Map. addOverlay (ply); // Add administrative boundaries
}
});
}) (Index );
}

3. Add the marker and label, that is, (3, 4) to display the picture of the infected person and the label of the infected person:Copy codeThe Code is as follows: var myIcon = new BMap. Icon ("infection.png", new BMap. Size (27,60 ));
Var marker1 = new BMap. Marker (center, {icon: myIcon}); // marker
Map. addOverlay (marker1 );
Var label = new BMap. Label ("count" + data [index]. infect, {offset: new BMap. Size (-10, 0)}); // display label
Marker1.setLabel (label );

The complete code is as follows:Copy codeThe Code is as follows: <! DOCTYPE html>
<Html>
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Style type = "text/css">
Body, html, # allmap {width: 100%; height: 100%; overflow: hidden; margin: 0 ;}
# L-map {height: 100%; width: 78%; float: left; border-right: 2px solid # bcbcbcbc ;}
# R-result {height: 100%; width: 20%; float: left ;}
</Style>
<Script type = "text/javascript" src = "http://api.map.baidu.com/api? V = 1.4 "> </script>
<Title> H7N9 distribution chart </title>
</Head>
<Body>
<Div id = "allmap"> </div>
</Body>
</Html>
<Script type = "text/javascript">
Var map = new BMap. Map ("allmap ");
Map. centerAndZoom (new BMap. Point (116.403765, 39.914850), 5 );
Map. enableScrollWheelZoom ();
Var cr = new BMap. CopyrightControl ({anchor: BMAP_ANCHOR_TOP_RIGHT });
Map. addControl (cr); // Add a copyright control
Var bs = map. getBounds ();
Cr. addCopyright ({id: 1, content: "<a href = 'HTTP: // your style = 'fontfamily:; font-size: 18px; background: white '> H7N9 data source </a> ", bounds: bs });
Map. setViewport (new BMap. Bounds (new BMap. Point (114.603589, 26.853244), new BMap. Point (122.863975, 35.288772); // adjust the field of view
Var data = [{city: 'shanghai', infect: 10, color: '# FF0000'}, {city: 'jiangsu province ', infect: 6, color: '# EE3B3B'}, {city: 'anhui province ', infect: 2, color:' # FFAEB9 '}, {city: 'zhejiang province', infect: 3, color: '# EE3B3B'}];
// Shanghai (10 cases, 4 deaths), Jiangsu (6 cases), Anhui (2 cases), Zhejiang (3 cases, 2 cases of deaths) data no. 4.8
Var bdary = new BMap. Boundary ();
Var length = data. length;
For (var index = 0; index <length; index ++)
{
(Function (index) {// closure usage
Bdary. get (data [index]. city, function (rs) {// obtain the Administrative Region
Var count = rs. boundaries. length; // The administrative area consists of several polygon.
Var bounds;
Var center;
For (var I = 0; I <count; I ++ ){
Ply = new BMap. polygon (rs. boundaries [I], {strokeWeight: 2, strokeColor: data [index]. color, fillColor: data [index]. color, fillOpacity: 0.8}); // create a polygon covering.
If (! Bounds) // obtain the central point of the first part of the administrative area
{
Center = ply. getBounds (). getCenter ();
}
Map. addOverlay (ply); // Add a covering
}

Var myIcon = new BMap. Icon ("infection.png", new BMap. Size (27,60 ));
Var marker1 = new BMap. Marker (center, {icon: myIcon}); // marker
Map. addOverlay (marker1 );
Var label = new BMap. Label ("count" + data [index]. infect, {offset: new BMap. Size (-10, 0)}); // display label
Marker1.setLabel (label );
});
}) (Index );
}
</Script>

Done!

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