气象数据之风向数据json格式解析
数据示例：（全球风向数据）
[ { "header": { "discipline": 0, "disciplineName": "Meteorological products", "gribEdition": 2, "gribLength": 251674, "center": 7, "centerName": "US National Weather Service - NCEP(WMC)", "subcenter": 0, "refTime": "2017-12-27T00:00:00.000Z", "significanceOfRT": 1, "significanceOfRTName": "Start of forecast", "productStatus": 0, "productStatusName": "Operational products", "productType": 1, "productTypeName": "Forecast products", "productDefinitionTemplate": 0, "productDefinitionTemplateName": "Analysis/forecast at horizontal level/layer at a point in time", "parameterCategory": 2, "parameterCategoryName": "Momentum", "parameterNumber": 2, "parameterNumberName": "U-component_of_wind", "parameterUnit": "m.s-1", "genProcessType": 2, "genProcessTypeName": "Forecast", "forecastTime": 0, "surface1Type": 103, "surface1TypeName": "Specified height level above ground", "surface1Value": 10, "surface2Type": 255, "surface2TypeName": "Missing", "surface2Value": 0, "gridDefinitionTemplate": 0, "gridDefinitionTemplateName": "Latitude_Longitude", "numberPoints": 259920, "shape": 6, "shapeName": "Earth spherical with radius of 6,371,229.0 m", "gridUnits": "degrees", "resolution": 48, "winds": "true", "scanMode": 0, "nx": 720, "ny": 361, "basicAngle": 0, "lo1": 0, "la1": 90, "lo2": 359.5, "la2": -90, "dx": 0.5, "dy": 0.5 }, "data": [ 2.3011596, 2.3011596, 2.3011596, 2.2811596, ...... 1.1211597, 1.1511596, 1.1711596 ] }, { "header": { "discipline": 0, "disciplineName": "Meteorological products", "gribEdition": 2, "gribLength": 245626, "center": 7, "centerName": "US National Weather Service - NCEP(WMC)", "subcenter": 0, "refTime": "2017-12-27T00:00:00.000Z", "significanceOfRT": 1, "significanceOfRTName": "Start of forecast", "productStatus": 0, "productStatusName": "Operational products", "productType": 1, "productTypeName": "Forecast products", "productDefinitionTemplate": 0, "productDefinitionTemplateName": "Analysis/forecast at horizontal level/layer at a point in time", "parameterCategory": 2, "parameterCategoryName": "Momentum", "parameterNumber": 3, "parameterNumberName": "V-component_of_wind", "parameterUnit": "m.s-1", "genProcessType": 2, "genProcessTypeName": "Forecast", "forecastTime": 0, "surface1Type": 103, "surface1TypeName": "Specified height level above ground", "surface1Value": 10, "surface2Type": 255, "surface2TypeName": "Missing", "surface2Value": 0, "gridDefinitionTemplate": 0, "gridDefinitionTemplateName": "Latitude_Longitude", "numberPoints": 259920, "shape": 6, "shapeName": "Earth spherical with radius of 6,371,229.0 m", "gridUnits": "degrees", "resolution": 48, "winds": "true", "scanMode": 0, "nx": 720, "ny": 361, "basicAngle": 0, "lo1": 0, "la1": 90, "lo2": 359.5, "la2": -90, "dx": 0.5, "dy": 0.5 }, "data": [ -0.12500733, -0.14500733, -0.16500732, ...... -2.9750073, -2.9650073 ] } ]
一、风向数据介绍：
示例风向数据将地球以0.5为步长分为横向720、纵向361个栅格。然后记录了每个栅格中南北方向（U）、东西方向（V）两个方向上的风力值。
示例数据中data中记录了720*361=259920个风力数值。数据中已省略。
二、header参数介绍：
|
parameterCategory
|
配置了数据记录内容，风力数据默认为2 |
|
parameterCategoryName
|
风向数据默认：Momentum |
|
parameterNumber
|
记录了数据方向：U向为2，V向为3 |
|
parameterNumberName
|
U-component_of_wind/V-component_of_wind |
|
numberPoints
|
数据点数量 |
|
nx
|
横向划分栅格数量 |
|
ny
|
纵向划分栅格数量 |
|
dx
|
横向步长 |
|
dy
|
纵向步长 |
|
lo1
|
横向起点，全球默认为0 |
|
la1
|
纵向起点，全球默认为-90 |
|
lo2
|
横向终点，全球默认359.5，根据步长有所不同 |
|
la2
|
纵向终点，全球默认-90 |
注意：这些就是前端展示风向数据的主要参数，所以做数据转换时，只要将其配置完成即可。
钻研不易，转载请注明出处。。。。。。