HashTrack State Upgrades

[klassenjs]

It would be useful if HashTrack could restore the visible state of the map so that sharing the URL with someone else or bookmarking it for yourself would restore the map as it looked before.

Currently, the following are tracked:

• Map center and scale
• The list of visible layers

To restore the map to its previous visible state, at least the following would be, in addition, required:

• Layer Z-Order
• Layer Opacity
• Drawings
• Query results

While all of this state may be technically trackable, doing so is a lot of data and would produce exceptionally long URLs that in many instances would exceed the lengths allowed by the browsers. This could be somewhat mitigated by compressing the data but that wouldn't remove the length limitation and would also make testing and manual inspection/changing of the URL significantly more painful and thus may not be worth the complexity. Thus, we will not be able to reliably track everything and will need to be selective about what is and isn't tracked.

[klassenjs]

At this point and unless there is a real need demonstrated to track more, it probably makes most sense to document what is and isn't tracked.

[tchaddad]

Is there a simple example of what can be bookmarked that we can include in the demo? At one point we had a bookmarking example, but I think that was back in 2.8-2.9 ?

[theduckylittle]

The list @klassenjs mentioned is what is currently bookmarkable. I do have a request to recreate the "bookmark" tool which will put the URL into a textfield and offer to copy it to the clipboard.