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detect-coordinates
Advanced tools
Geo coordinates detection based on a mongodb-schema type.
This module exports a function which detects whether a mongodb-schema type object represents geo coordinates, either as legacy coordinate pairs (2-element array of long/lat coordinates) or a GeoJSON object.
It returns a zipped array of [[lng, lat], [lng, lat], ...]
coordinates, or
false
if no coordinates could be found.
For this example, you need the mongodb
node driver, mongodb-schema
and
lodash
modules installed in addition to this module:
npm install mongodb mongodb-schema detect-coordinates lodash
This code connects to a MongoDB server, gets the schema of a collection and looks at the first type of the first field to determine if it has coordinates.
var parseSchema = require('mongodb-schema');
var connect = require('mongodb');
var detect = require('detect-coordinates');
var _ = require('lodash');
// connect to a MongoDB instance
connect('mongodb://localhost:27017/test', function(err, db){
if(err) return console.error(err);
// get the schema of the collection `test.users` (only first 100 docs)
parseSchema('test.users', db.collection('users').find().limit(100), function(err, schema){
if(err) return console.error(err);
// serialize the schema and extract first type of field "last_position"
var plainSchema = schema.serialize();
var type = _.find(plainSchema.fields, ['name', 'last_position']).types[0];
// check if that type represents geo coordinates
var coordinates = detect(type);
if (coordinates) {
console.log('type contains coordinates, here they are:\n', coordinates);
} else {
console.log('type does not contain coordinates!');
}
db.close();
});
});
This outputs:
type contains coordinates, here they are:
[ [ -73.98808416, 40.74854862 ],
[ -74.015756, 40.711512 ],
[ -74.0026376103, 40.7390169121 ],
[ -74.015756, 40.711512 ],
[ -73.96525063, 40.71044554 ],
...
Apache 2.0
FAQs
Geo coordinates detection based of a mongodb-schema type.
The npm package detect-coordinates receives a total of 0 weekly downloads. As such, detect-coordinates popularity was classified as not popular.
We found that detect-coordinates demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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