[Historic] the "spherical mercator" of time?

[Dan Vanderkam]

Depending on the situation, we may be saved by the fact that most features
on a historical map won't change that frequently. For instance, in my
countries of the world demo (* see below), I used two layers: a tiled
geographical layer (which never changes) and a country boundaries layer
(which rarely changes on short timescales). Compositing features
client-side becomes a more compelling approach with historical maps, since
the features can change or remain the same independently of one another.

  - Dan

* http://danvk.org/whm/map.html. Disclaimers: this works best in Chrome.
You can pan with the mouse and use the scroll wheel to zoom. It uses
unlicensed commercial data, so please don't share the link.
On Aug 23, 2012 5:54 PM, "Aaron Straup Cope" <aaronofmontreal at gmail.com>
wrote:

> It's definitely a thing that's been talked about in the past at Stamen.
>
> If Mike and/or Tom aren't on the list already we should drag them in.
>
> On 8/23/12 10:46 AM, Mikel Maron wrote:
>
>> One thing I'm pondering is how to efficiently and easily share time
>> aware geodata. Prior to Google gifting the world spherical mercator
>> tiles, web maps were rendered on request, based bounding box,
>> dimensions, projection. WMS was slow. Naturally I'd expect we'd use
>> cached tiles for serving time data, but I don't see an obvious way of
>> this not exploding to all arbitrary times in history. Perhaps enough to
>> begin by expanding the tile template to /{time}/{zoom}/{x}/{y}, and
>> maybe limiting time to year or decade or century. Is there something
>> more clever? What ways do historians bring methodical order to the times
>> and eras in history that are of most common interest and utility?
>> * Mikel Maron * +14152835207 @mikel s:mikelmaron
>>
>>
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