Re:Show HN: Serverless USGS historical topographic map tiles
by eharmon on Thursday May 06, 2021 @08:17PM
(#27070456)
This is great! I've been fascinated with tiling historical maps for quite some time. In fact, I made a very similar (but far less advanced) site focusing primarily on historical USGS maps of the SF Bay Area [0].
I'm curious about this:
> To get around this, I apply a "hack" to the MosaicJSON format. Instead of just encoding a URL string, I encode the url and the bounds of the map as a JSON string.
In my effort I struggled to automatically assemble bounds from tilted and angled scans. Is this source data set clean enough to make simpler assumptions, or did you also devise a way to automatically determine the map boundaries within the scan?
I'm curious about this:
> To get around this, I apply a "hack" to the MosaicJSON format. Instead of just encoding a URL string, I encode the url and the bounds of the map as a JSON string.
In my effort I struggled to automatically assemble bounds from tilted and angled scans. Is this source data set clean enough to make simpler assumptions, or did you also devise a way to automatically determine the map boundaries within the scan?
[0]: https://eharmon.net/bayquads/