Make map behavior more predictable

[nimmolo]

• All maps: Make markers and boxes the same red color (!)
• Occurrence maps: Display location boxes only, when obs get aggregated by CollapsibleCollection. Reason: There is a problem with my recent "improvement" on main, for Joanne's Santa Cruz Island observations. Two very close points that were previously aggregated into "USA" (and thus hard to detect) are now being aggregated into a box that is so small it is invisible at a zoomed-out view. Switching to displaying the associated Location boxes is the easiest way to bump up the box size to something noticeable. Links to the individual obs are still accessible via the box caption.
• My goal is still to move to Google's MarkerClusterer, but I feel like this stopgap is much improved over what's currently on main.

• Single Observation map: When there is GPS point data for an obs, favor the point, even if it's outside the bounds of the associated Location. (Increase delta for "location dubiousness" to 2.0, from 0.2). This is part of a general move towards making GPS point data definitive, and Location associations secondary.
• Single Observation map: Improve default zoom for points (on main, these are too zoomed in to be useful)

[nimmolo]

@mo-nathan @JoeCohen If you have time, please check in on the discussion in #2088. Whatever the consensus is, i'll apply it to this PR.

[coveralls]

coverage: 94.409% (+0.002%) from 94.407% when pulling 0f908c51d80342247b9edff643ac3aababf675b4 on nimmo-exclude-vague-locations-from-maps into 3ce08662b9708da021950f6578fd551051457db3 on main.

[JoeCohen]

@nimmolo:

1. I agree that this is a huge improvement over main and well worth doing as a "stopgap".
2. I'm not sure which part of discussion #2088 you're referring to. If it's the part about overlapping points, I slightly prefer representing them as a box.
3. Are there boxes which, when clicked, will display a map of point locations within the box? If so, maybe differentiate those from boxes which don't display another map when clicked.
4. Please ignore the following unless it's easy to deal with in this PR. The PR is a big enough win to be merged without dealing with the following. There's an issue with boxes which contain both geolocated and un-geolocated Observations. I'd like to see a map with pins for the geolocated Observations, but I only see a map with boxes. Example:
   • Goto http://localhost:3000/observations?pattern=Sarcosphaera+coronaria+region%3A%22Klickitat+Co.%5C%2C+Washington%5C%2C+USA%22 (Observations of Sarcospheara coronaria in the region Klickitat Co. Result: lists 7 Observations, 5 of which are geolocated.
   • Click Show Map. Result: Map with one large box containing two smaller boxes.

Each smaller box represents a single, un-geolocated Observation with a Location whose box is smaller than Klickitat Co. The larger box outlines Klickitat Co.

• Click the larger box Result: Observations: 5 (Show All | Map All) ...

If you click Show All, it lists 5 Observations: the 2 without lat/lon, and 3 with lat/lon. Somehow, 2 of the geolocated Observations have gone missing.

• Back on the map that lists 5 Observations for the big box.
• Click Map All Result: A map that looks the same. But clicking the box says "Observations: 3 (Show All | Map All) ..."

I have no clue why two of the results have disappeared. Bug in query? Wrong query string? Something else? I can't figure out how to get a map of only points.

[JoeCohen]

Maybe use a different symbol instead of a box if the the box represents only a combination of (a) any ungeolocated Observations and (b) any Observations with hidden geolcation. Possibilities include: a circle, a different color/shape pin.

[nimmolo]

@JoeCohen - good catch re: points in Klickitat County.

I just pushed a change where it lets points through if the number of objects is below the max, i.e. if there's no chance the points will be auto-aggregated and potentially become invisible, like Joanne's in Santa Cruz Island on the larger occurrence map.

This is a definite improvement that I would have missed, thank you. Your example in Klickitat now shows points.

• On this PR, if the map has enough objects to contain auto-collapsed boxes, there's no way to get points at all. This is intentional, per Joanne's example.
• Unfortunately there's no logic to flag what an auto-collapsed box contains currently. It's conceivable, but we may soon retire the auto-collapsed boxes.
• As of the last meeting, my goal is to try switching to sending ONLY point data to GMaps, and let the "MarkerClusterer" do the aggregating. Observations with no GPS would send their associated location's center point, as discussed.

This will only work if Google somehow provides separate captions for coinciding points, because there will be plenty of these. If that's not possible, we're stuck with boxes for the long term, and I can invest more time into differentiating them.

[nimmolo]

@JoeCohen The question in #2088 is my two long illustrated posts at the bottom, regarding maps for single observations. This PR changes the default to favor the geolocation over the associated MO location in all cases.