02-信息学院-物联网导论-论文模板(17)

5.2.2数据词典

（1）commentitem表为评论项表，表结构如表5-1所示。

表5-1 commentitem表的结构

COMMENT

景点浏览功能主要代码如下：

function load() {

resizeMapDiv();

var copyright = new 孝飞");

var pic_tileLayers = [ new GTileLayer(copyrightCollection , 0, 17)];

pic_tileLayers[0].getTileUrl = customGetTileURL;

pic_tileLayers[0].isPng = function() { return false; };

pic_tileLayers[0].getOpacity = function() { return 1.0; };

var proj=new CustomProjection(5,imageWraps);

var pic_customMap = new GMapType(pic_tileLayers, proj, "Pic",

{maxResolution:5,minResolution:0,errorMessage:"Datanot available"});

//Now create the custom map. Would normally be

//G_NORMAL_MAP,G_SATELLITE_MAP,G_HYBRID_MAP

map=newGMap2(document.getElementById("map"),{mapTypes:[pic_customMap]}); map.addControl(new GLargeMapControl());

map.addControl(new GMapTypeControl());

map.addControl(new GOverviewMapControl());

map.enableDoubleClickZoom();

map.enableContinuousZoom();

map.enableScrollWheelZoom();

map.setCenter(new GLatLng(centreLat, centreLon), initialZoom, pic_customMap);

VARCHAR 2000 否