"Baidu Map API" How to obtain the boundaries of administrative areas?

Absrtact: Previously taught everyone how to obtain the administrative area, or custom to get the boundary value of a region. Today to teach you directly call Baidu Map API1.3 (current version) to obtain the boundary value of the administrative region.

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I. Building a map

Create a Map object, set up a center point.

var map = new Bmap.map ("container");
Map.centerandzoom (New Bmap.point (116.403765, 39.914850), 5);

Second, add map events and controls

Control: Fish bone Control I used a miniature;

Map Event: Wheel Zoom added.

Map.addcontrol (New Bmap.navigationcontrol ({type:bmap_navigation_control_small}));
Map.enablescrollwheelzoom ();

Iii. acquisition of administrative areas

constructor function boundary;

Get method to obtain the boundary of the administrative area.

RS is the result obtained.

var bdary = new Bmap.boundary ();
Bdary.get (name, function (RS) {       //Get Administrative
        area//Here is the user's own function.     
});   

Iv. Add cover

After obtaining the number of points in the boundary, add a polygon overlay.

var count = rs.boundaries.length; How many of the points in the administrative area are for
        (var i = 0; i < count; i++) {
            var ply = new Bmap.polygon (rs.boundaries[i), {strokeweight:2, str Okecolor: "#ff0000"}); Establishing polygon covering
            map.addoverlay (ply);  Add Overlay
        }    

V. Adjust the field of vision

Points is an array of dots, and the system automatically displays all the points in the points.

Map.setviewport (points);    Adjust the field of vision

Effect Chart:

All source code:

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">  



Related articles:

"Self-obtained regional latitude and longitude" tool

Http://www.cnblogs.com/milkmap/archive/2012/02/23/2365064.html