42 lines
1.5 KiB
Markdown
42 lines
1.5 KiB
Markdown
# Dyomedea
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## Hiking app.
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## Components
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### Slippy
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The viewport on the underlying map
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### Map
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The map itself (and its overlays)
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## Data formats
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There is a number of data formats more or less specific to geography and hiking, such as:
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* [GPX 1.1 Schema Documentation](https://www.topografix.com/GPX/1/1/)
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* [GeoJSON](https://geojson.org/)
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* [Keyhole Markup Language - Wikipedia](https://en.m.wikipedia.org/wiki/Keyhole_Markup_Language)
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* [Elements — OpenStreetMap Wiki](https://wiki.openstreetmap.org/wiki/Elements)
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* [<svg> - SVG: Scalable Vector Graphics | MDN](https://developer.mozilla.org/en-US/docs/Web/SVG/Element/svg)
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SVG is very generic and is used to draw 2D figures in HTML applications and doesn't care about geography.
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KML, GeoJSON and OSM elements have been designed to represent generic geographical points and shapes.
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GPX is more specific, having been designed to represent routes and tracks and its semantices are directly useable in our application.
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The strucure of our components and indexes can therefore follow the GPX format.
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OSM elements is interesting to extract information from the OSM DB, either by querying their API or by downloading portions of the database.
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GeoJSON might be of interest as an intermediate format since a number of JS libraries have been developped to perform queries or draw GeoJSON data as SVG.
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KML might be considered as an import format.
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And SVG, of course will be used to render tracks and routes on a map since its elements are directly supported by React.
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