风向转化js
2021-05-25 本文已影响0人
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/**
* 气象-风向转化工具
*/
var WWindUtil = {};
/**
* 风向json
*/
WWindUtil.WDJson = {
"N": {
"en": "N",
"cn": "北",
"desc": "北"
},
"NNE": {
"en": "NNE",
"cn": "北东北",
"desc": "东北偏北"
},
"NE": {
"en": "NE",
"cn": "东北",
"desc": "东北"
},
"ENE": {
"en": "ENE",
"cn": "东东北",
"desc": "东北偏北"
},
"E": {
"en": "E",
"cn": "东",
"desc": "东"
},
"ESE": {
"en": "ESE",
"cn": "东东南",
"desc": "东南偏东"
},
"SE": {
"en": "SNE",
"cn": "东南",
"desc": "东南"
},
"SSE": {
"en": "SSE",
"cn": "南东南",
"desc": "东南偏南"
},
"S": {
"en": "S",
"cn": "南",
"desc": "南"
},
"SSW": {
"en": "SSW",
"cn": "南西南",
"desc": "西南偏南"
},
"SW": {
"en": "SW",
"cn": "西南",
"desc": "西南"
},
"WSW": {
"en": "WSW",
"cn": "西西南",
"desc": "西南偏西"
},
"W": {
"en": "W",
"cn": "西",
"desc": "西"
},
"WNW": {
"en": "WNW",
"cn": "西西北",
"desc": "西北偏西"
},
"NW": {
"en": "NW",
"cn": "西北",
"desc": "西北"
},
"NNW": {
"en": "NW",
"cn": "北西北",
"desc": "西北偏北"
},
"ERROR": {
"en": "error value",
"cn": "错误数值",
"desc": "错误数值"
}
};
/**
* 风力等级
*/
WWindUtil.WRatingArr=[
{
"min":0.0,
"max":0.2,
"level":0,
"name":"无风",
"landScene":"静，烟直上"
},
{
"min":0.3,
"max":1.5,
"level":1,
"name":"软风",
"landScene":"烟示风向"
},
{
"min":1.6,
"max":3.3,
"level":2,
"name":"轻风",
"landScene":"感觉有风"
},
{
"min":3.4,
"max":5.4,
"level":3,
"name":"微风",
"landScene":"旌旗展开"
},
{
"min":5.5,
"max":7.9,
"level":4,
"name":"和风",
"landScene":"吹起尘土"
},
{
"min":8.0,
"max":10.7,
"level":5,
"name":"劲风",
"landScene":"小树摇摆"
},
{
"min":10.8,
"max":13.8,
"level":6,
"name":"强风",
"landScene":"电线有声"
},
{
"min":13.9,
"max":17.1,
"level":7,
"name":"疾风",
"landScene":"步行困难"
},
{
"min":17.2,
"max":20.7,
"level":8,
"name":"大风",
"landScene":"折毁树枝"
},
{
"min":20.8,
"max":24.4,
"level":9,
"name":"烈风",
"landScene":"小损房屋"
},
{
"min":24.5,
"max":28.4,
"level":10,
"name":"狂风",
"landScene":"拔起树木"
},
{
"min":28.5,
"max":32.6,
"level":11,
"name":"暴风",
"landScene":"损毁重大"
},
{
"min":32.7,
"max":36.9,
"level":0,
"name":"飓风",
"landScene":"摧毁极大"
},
{
"min":37.0,
"max":41.4,
"level":13,
"name":"",
"landScene":""
},
{
"min":41.5,
"max":46.1,
"level":14,
"name":"",
"landScene":""
},
{
"min":46.2,
"max":50.9,
"level":15,
"name":"",
"landScene":""
},
{
"min":51.0,
"max":56.0,
"level":16,
"name":"",
"landScene":""
},
{
"min":56.1,
"max":null,
"level":17,
"name":"",
"landScene":""
}
]
/** 风向值转文字风向
* @param {Object} windNumberValue 风向值
*/
WWindUtil.to16WindDirection = function(windNumberValue) {
if (windNumberValue > 360) {
return WWindUtil.WDJson.ERROR;
}
let a = Math.ceil(windNumberValue / 11.25);
let ret;
switch (a) {
case 32:
case 1:
ret = WWindUtil.WDJson.N;
break;
case 2:
case 3:
ret = WWindUtil.WDJson.NNE;
break;
case 4:
case 5:
ret = WWindUtil.WDJson.NE;
break;
case 6:
case 7:
ret = WWindUtil.WDJson.ENE;
break;
case 8:
case 9:
ret = WWindUtil.WDJson.E;
break;
case 10:
case 11:
ret = WWindUtil.WDJson.ESE;
break;
case 12:
case 13:
ret = WWindUtil.WDJson.SE;
break;
case 14:
case 15:
ret = WWindUtil.WDJson.SSE;
break;
case 16:
case 17:
ret = WWindUtil.WDJson.S;
break;
case 18:
case 19:
ret = WWindUtil.WDJson.SSW;
break;
case 20:
case 21:
ret = WWindUtil.WDJson.SW;
break;
case 22:
case 23:
ret = WWindUtil.WDJson.WSW;
break;
case 24:
case 25:
ret = WWindUtil.WDJson.W;
break;
case 26:
case 27:
ret = WWindUtil.WDJson.WNW;
break;
case 28:
case 29:
ret = WWindUtil.WDJson.NW;
break;
case 30:
case 31:
ret = WWindUtil.WDJson.NNW;
break;
default:
ret = WWindUtil.WDJson.ERROR;
break;
}
return ret;
}
/** 风向值转文字风向
* @param {Object} windNumberValue 风向值
*/
WWindUtil.to8WindDirection = function(windNumberValue) {
if (windNumberValue > 360) {
return WWindUtil.WDJson.ERROR;
}
let a = Math.ceil(windNumberValue / 22.5);
let ret;
switch (a) {
case 16:
case 1:
ret = WWindUtil.WDJson.N;
break;
case 2:
case 3:
ret = WWindUtil.WDJson.NE;
break;
case 4:
case 5:
ret = WWindUtil.WDJson.E;
break;
case 6:
case 7:
ret = WWindUtil.WDJson.SE;
break;
case 8:
case 9:
ret = WWindUtil.WDJson.S;
break;
case 10:
case 11:
ret = WWindUtil.WDJson.SW;
break;
case 12:
case 13:
ret = WWindUtil.WDJson.W;
break;
case 14:
case 15:
ret = WWindUtil.WDJson.NW;
break;
default:
ret = WWindUtil.WDJson.ERROR;
break;
}
return ret;
}
/** 风速转风力等级
* @param {Object} value 风速值 (m/s)
*/
WWindUtil.WindtoLevel=function(value){
let vl=Number(value);
if(!vl||vl<0){return null;}
let arr=WWindUtil.WRatingArr;
if(vl>=arr[arr.length-1].min){
return arr[arr.length-1];
}
for(let i=0;i<arr.length;i++){
if(vl >= arr[i].min && vl <= arr[i].max){
return arr[i];
}
}
return null;
}
// 风向值转文字
WWindUtil.windValueFormat = function(value) {
try{
let vl=Number(value);
if (!vl || vl > 360 || vl < 0) {
return '-';
}
return WWindUtil.to16WindDirection(value).desc;
}catch(e){
return '-';
}
}
/** 风速值转文字描述
* @param {Object} value 风速值
*/
WWindUtil.windFormatLevel = function(value) {
try{
let vl=Number(value);
if (!vl || vl > 100 || vl < 0) {
return "-";
}
return WWindUtil.WindtoLevel(value).level+"级("+WWindUtil.WindtoLevel(value).name+")";
}catch(e){
return "-";
}
}
export {
WWindUtil
};
