A minimal geo-bounding-box helper class implemented in pure Javascript. It comes with minimal tests and one major and two minor features:
- Create custom format output string
- Interpolate all 4 box corners
- Validate absolute coordinates
Tests can be run using node: node bbox.test.js. Missing features:
- Validate coordinates relative to each other ("is
bottomRightcorner really the bottom?")
The major motivation of bbox is to easily generate any type of string representation, specifying:
- the corners and order of corners printed:
corners: ['bottomLeft', 'bottomRight'] - the coordinates and order of coordinates printed:
coords: ['lat', 'lng'] - the separators for corners and coordinates:
cornerSeparator: '; ',coordSeparator: ', '
Bbox = require('./bbox.js');
const corners = {
bottomLeft: {
lng: 5.98865807458,
lat: 47.3024876979,
},
topRight: {
lng: 15.0169958839,
lat: 54.983104153,
},
};
const bbox = new Bbox(corners);
// bbox now has: bbox.bottomLeft && bbox.topRight && bbox.bottomRight && bbox.topLeft
let res = bbox.createBboxString({ corners: ['bottomLeft', 'bottomRight'] });
// res is '5.98865807458,47.3024876979;15.0169958839,47.3024876979'
res = bbox.createBboxString({ corners: ['bottomLeft', 'bottomRight','topLeft', 'topRight'] });
// res is '5.98865807458,47.3024876979;15.0169958839,47.3024876979;5.98865807458,54.983104153;15.0169958839,54.983104153'
res = bbox.createBboxString({ corners: ['bottomLeft', 'bottomRight'], coords: ['lng'] });
// res is '5.98865807458;15.0169958839'
res = bbox.createBboxString({ corners: ['bottomLeft', 'bottomRight'], coords: ['lat'] });
// res is '47.3024876979;47.3024876979'
res = bbox.createBboxString({ corners: ['bottomLeft', 'bottomRight'], coords: ['lat', 'lng'] });
// res is '47.3024876979,5.98865807458;47.3024876979,15.0169958839'
res = bbox.createBboxString({
corners: ['bottomLeft', 'bottomRight'],
cornerSeparator: ' | ',
coordSeparator: ' , '
});
// res is '5.98865807458 , 47.3024876979 | 15.0169958839 , 47.3024876979'
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