定型融合表层多边形

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问题描述

我有一个具有5个人口（列）的融合表，对于每个人，我要显示具有不同颜色的最高人口密度的多边形。

I have a fusion table with 5 populations (columns), for each these I want to display the polygons with the highest concentration of population in a different color.

在样式融合表图层的示例中，定义了polygonOptions，但是我不想要多边形有任何样式，除非有一个人口的集中，并且也因为这将采取1样式远离极限5。

In the example for styling fusion table layers, the "polygonOptions" was defined, but I don't want the polygons to have any styling unless there's a concentration of one of the populations, and also because that would take 1 style away from the limit of 5.

我不确定要更改什么或缺少什么以使这些样式正确显示。

I'm not sure what to change or what I'm missing to have these styles display correctly.

我的地图：

推荐答案

第一个问题是列名，当它们包含空格时，必须用单引号查询。

The first problem you have are the column-names, when they contain whitespaces, you must wrap them in single-quotes inside the query.

另一个问题（您需要应用6个样式，但限制为5个）。您还可以直接为地图创建样式，因此您可以创建一个将所有多边形的不透明度设置为0的虚拟样式。

The other issue(that you need to apply 6 styles but there is a limit of 5). You also may create styles directly for a map, so you may create a dummy-style that sets the opacity of all polygons to 0.

要应用此样式，请使用ID的样式，并将其与options-parameter传递给图层。我为你的地图创建了这样一个虚拟样式，它有ID 4

To apply this style use the ID of the style and pass it with the options-parameter to the Layer. I've created such a dummy-style for your map, it does have the ID 4

创建现在应该如下所示：
var layer1 = new google.maps.FusionTablesLayer（{

The layer-creation now should look like this:var layer1 = new google.maps.FusionTablesLayer({

  query: {
    select: 'geometry',
    from:   '1PM3_L795Eus1HXCylF6UM0tLqXarnkNZeB_LmM8'

  },
  options: {
        styleId: 4
      },
  styles: [
     {
        where: "'Puerto Rican Population' > 500",
    polygonOptions: {
     fillColor: "#46A2D1", //blue
     fillOpacity: 0.7}
     },
   {
        where: "'Cuban Population' > 500",
    polygonOptions: {
     fillColor: "#F29400", //orange
     fillOpacity: 0.7 }
     },
     {
        where: "'Bahaman Population' > 100",
    polygonOptions: {
     fillColor: "#BAC200", //yellow
     fillOpacity: 0.7}
     },
     {
        where: "'Dominican Population' >200",
    polygonOptions: {
     fillColor: "#E068A0", //pink
     fillOpacity: 0.7 }
     },
     {
        where: "'Haitian Population' > 500",
    polygonOptions: {
     fillColor: "#66A919", //green
     fillOpactity: 0.7}
   }
    ]
});

测试：

与评论相关：

您使用的栏名称不正确。

you are using wrong column-names.

有关：

'Nicaraguan' -> 'Nicaraguan Population'

对于：

'Venezuelan Population'  ->'Venzuelan Population
'Peruvian'               ->'Peruvian Population'
'Argentinian Population' ->'Argentinean Population'

这篇关于定型融合表层多边形的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

Polygons