StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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43 lines
1.3 KiB
43 lines
1.3 KiB
4 years ago
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# vt-pbf [](https://circleci.com/gh/mapbox/vt-pbf)
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Serialize [Mapbox vector tiles](https://github.com/mapbox/vector-tile-spec) to binary protobufs in javascript.
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## Usage
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As far as I know, the two places you might get a JS representation of a vector
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tile are [geojson-vt](https://github.com/mapbox/geojson-vt) and
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[vector-tile-js](https://github.com/mapbox/vector-tile-js). These both use
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slightly different internal representations, so serializing each looks slightly
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different:
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## From vector-tile-js
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```javascript
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var vtpbf = require('vt-pbf')
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var VectorTile = require('vector-tile').VectorTile
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var data = fs.readFileSync(__dirname + '/fixtures/rectangle-1.0.0.pbf')
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var tile = new VectorTile(new Pbf(data))
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var orig = tile.layers['geojsonLayer'].feature(0).toGeoJSON(0, 0, 1)
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var buff = vtpbf(tile)
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fs.writeFileSync('my-tile.pbf', buff)
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```
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## From geojson-vt
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```javascript
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var vtpbf = require('vt-pbf')
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var geojsonVt = require('geojson-vt')
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var orig = JSON.parse(fs.readFileSync(__dirname + '/fixtures/rectangle.geojson'))
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var tileindex = geojsonVt(orig)
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var tile = tileindex.getTile(1, 0, 0)
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// pass in an object mapping layername -> tile object
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var buff = vtpbf.fromGeojsonVt({ 'geojsonLayer': tile })
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fs.writeFileSync('my-tile.pbf', buff)
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```
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