Change: improvements to map visualization

[arikfr]

• Fix Cannot set colors in "classify by" in "map visualization"  #557: user can set his own colors for the different groups on the map.
• Add layer selection control.
• Inspired by Add: map marker cluster visualization #1203, added support for markers clustering.
• Changed the map setting screen (to hopefully) be simpler.
• Disabled automatic zoom when scrolling past the window.

[arikfr]

@WesleyBatista I didn't implement any special settings. If there are any settings you want me to port from your code, let me know and I will add it. Thanks!

[WesleyBatista]

Really thanks for implementing it!

I just had time to test it today. Here are my thoughts:

1. I really like that now we can use group by in the visualization settings, and now we are able to select the groups that we want to see in the visualization. 👏 👏 👏

2. The colors used by the marker cluster library and ours is not managed very well. for example, take a look at this 5 blue points:


When zooming out, the 4 closer to each other are clustered and the color is set to green.

The same issue within another use case: looking at the yellow clusters in the next image, I find clusters with the same colors closer to each other, and start to wondering "why they were not grouped?", but I know that we have 5 different groups because I used the group by.

It would be more meaningful if the colors used was the group's color, so I would also know which groups they belongs.

3. the custom layers is something that I miss. The OpenStreet Map default tiles is messy by showing a lot of information in the map, and the colors it uses mixes with the ones used by the clusters/groups. For example, look at this two images:

The Stamen Toner layers are more clear by showing only the necessary. That way the user which is taking care of a dashboard, for example, can focus on the main information which is the clusters.

For now that is what I found 😄

[arikfr]

@WesleyBatista thanks! I'll implement both.

[arikfr]

@WesleyBatista added both things.

[shyamgopal]

Thank you so much @arikfr and @WesleyBatista !!