There are many inquiries about grouping overlays on the map, and this can be resolved by creating category legend. There are two types of category legend can be created : single selection & multiple selection. Here is a sample map created with category legend (multiple selection):
You can follow steps in the video tutorial to create similar clickable map for yourself:
As the issue of same-sex marriage becomes a hot topic recently in several countries, for example in the United States, a new Pew Research Center survey finds huge variance by counties question of whether homosexuality should be accepted or rejected by society. An interactive heat map has been created by iMapBuilder to showcase the result.
The survey that conducted in 39 countries reflects broad acceptance of homosexuality in North America, Europe, and much of Latin America. According to statistics, there are obvious increasing people in South Korea, the United States and Canada accept the homosexual with 10% growth since 2007. The survey also claims that religions and age generation are factors towards the acceptance.
Check the following heat map to see which regions have higher acceptance towards homosexual, and you can find more details by watching the embedded videos and news in the infobox.