Hi Jeremy, I wrote an app which did that and it was called ViewingDale. It was released about 10 years ago but was only midly successful. You can see it running on a youtube video here:
https://www.youtube.com/watch?v=qELcbKXdRm8
The title refers to CWBP which is this websites Community World Building Project. If you go to the community mapping projects area then you will find that world and all of the threads relating to it. My sig used to have a CWBP1 area listing which linked to the pages - not sure the links work any more. There is also a CWBP2 project which has only limited mapping done on it but is still technically currently in progres. Then for the guilds 10th anniversary we had the GuildWorld where lots of us mapped bits of a new world that is also under the community pages.
I have put all of the GuildWorld into a LeafletJS map and you can have a play with that. The link is a sticky on the guildworld but ill link it here. There is also a set of zoomable maps for CWBP1 which there is no public sticky link but it does exist and this is the link - I just need to get off my butt and make up a page with "all" (all being 2 at the mo) links to the zoomable maps.
Now with my app ViewingDale it has hot spots that you can place down on the map and it can take you to a) other maps so you can jump into a building and carry on zooming or b) links to documents, sounds, movies and other stuff like a document of the character stats or monster stats etc. See the YT vid where it jumps to the picture of the top down icon. On the community zoom maps they are HTML web pages and we have included jumps to other maps and it can link to pictures and other stuff too. Its a little more clumsy but it can do it. So on guild world if you zoom down to Robbies map which is bottom right of the main continent then there is a link for the town The Guild which links to the this guild web page. But the better set of links is for CWBP1 where you can go to Ansium in the world and click on it and then my Redrobes map which is the green looking square mid left within Ansium and it will link down a few more steps down to Fentor Cross etc.
My app was a boxed disk but is not for sale any more and in fact the webpage is not there now tho I hope to reinstate the web pages somewhere soon. I am even considering selling the app as a digitial download only from this guild now that were getting the Buy/Sell sorted out. I am also considering porting it for linux for the Raspberry PI so that for $40 / £30 you can have the computer to run it. My app was a VTT - thats a virtual table top where several people can log into it and play online and move the characters about in the world. There are several VTT's out there. Notably, MapTool is a free one and also comes with zoom. It has many features extra to my app but its zoom capability was not as good. But its certainly worth checking out.
Finally, I have and will always disagree with this raster / vector argument about it being required for zooming. Not only have I wrote an app that shows that the argument is duff but in vector its not all that different since when you zoom you run out of vector points just as easily as you run out of pixels in raster images. You can zoom with raster or vector. You just need lots of pixels or lots of vector points. Since most people map raster then I think it would be hard to have a vector only zoom mapping system that took in a large assortment of other peoples work.
Right - links to zoomy maps:
Community pages:
https://www.cartographersguild.com/f...splay.php?f=61
Guildworld:
https://www.cartographersguild.com/l...ype=GuildWorld
CWBP1 zoom map:
https://www.cartographersguild.com/l...php?type=cwbp1
Edit: I have become a bit distracted. Whilst I had youtube open I thought id see if I could find the original inspiration for my app. I have searched for this before and never found it but it seems that somebody has uploaded it. When I was a wee nipper there was a program on the BBC and somebody has put most of the series up on youtube. Forgive the 1980's fashion but this is "Making the most of the micro". So after some extended scanning through the episode list I have found the bit I remember...
https://www.youtube.com/watch?v=6u2zEhqrTs8
Check out about 12mins 50s or so and he zooms into the world and down until he gets to a house. I was playing D&D a lot at this time and wanted a mapping system just like that. I saw that and immediately set to work. My first app was a vector one on the Acorn Electron just like that and it was about that speed too. So that was 1983 - 33years ago. I thought that footage was lost ! Hmmm showing my age now...
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