Compress vector tiles about node-tileserver HOT 4 OPEN

Also think of using binary formats like protocol buffers and compressing tiles with e.g. gzip.

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Have a look at

• https://github.com/mapbox/pbf
• https://github.com/mapbox/geobuf
• https://github.com/mapbox/vector-tile-js
• https://github.com/anandthakker/vt-pbf
• https://github.com/mapbox/awesome-vector-tiles
• https://github.com/mapbox/vector-tile-spec
• https://github.com/developmentseed/vt-geojson
• https://github.com/mapbox/geojson-vt
• https://github.com/mapbox/tippecanoe

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Compression using gzip:

• https://coderwall.com/p/vjisya/gzip-compression-with-nodejs-zlib-gzip
• https://nodejs.org/api/zlib.html

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I suggest that the tiles are gzipped right at the creation, and also saved this way. This could save some byte of disk space if a compressed file then becomes a disk block smaller, but it is also expected that it's the common case that clients support gzip encoding. The few clients that do not can be served by _de_compressing the data when sending to them, which is less expensive than _com_pressing on the fly.

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