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Carrying on with these Mississippi maps. The ones that have been rotated to some odd angle have white backgrounds in the resulting non-map triangles, which is no good to me as it obscures the modern map beneath. Also, I think there's some overlap of areas, so they'll have to have a layer each.
Anyway, it turns out another GDAL command line tool can be used to turn the white backgrounds transparent. There's a little sawtooth fringing at the edges, but it's good enough for now
One of the chickens laid a thin shelled egg this morning, which has just been gently fried, along with one very tasty cep found on this morning’s walk. All being washed down with a glass of 2017 home made wine. Can’t get much more local than that.
Cocktail sausages and a bag of cheese & onion for lunch
Still mucking about with those maps. Having wasted about 45 minutes trying to automate the process of rendering them to tiles in subdirectories, I realised it was quicker, given my fairly limited knowledge of bash, to just create the directory structure myself then set it running
Then I can go back and rename the directories (which are named p10, p12, p15, and p22 after the several collections of sheets) to the types of map they contain: stream flows, sedimentary rocks, something else to do with alluvium, and historical meanders. Something like that, anyway; I'll have to check the Corps of Engineers site to make sure I've got it right.
And with that all done, I'll then stick the lot on GitHub and make it a publicly accessible site via GitHub Pages, so I'll post a link once that's up and running
And then I can use it for the examples on this Maps4HTML thing I'm actually doing it all for
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