geojson-to-mongo v0.0.4

geojson-to-mongo

A simple CLI tool that takes in a geoJSON feature collection and adds the features as documents to a mongo collection. Built using streams so it can handle HUGE files (think CENSUS BLOCKS for all of USA!).

Also creates a 2dsphere index on the geometry field of the geoJSON documents so you are ready for geospatial queries when it's done.

Motivation

Getting sick of moving CENSUS shapefiles to MongoDB and wanting to build a CLI tool to do that for me. Shapefile input and simplification coming...

Quick Start

npm install geojson-to-mongo

Input geoJSON file should contain features with array of valid geoJSON objects (this conforms to geoJSON feature collection).

{
  features: [
    {geoJSON object1},
    {geoJSON object2},
    ...
  ]
}

Execute the script:

The following will connect to the tracts db on the mongo instance at localhost:27017 and add documents found at ./polygons.geojson.

./node_modules/.bin/geojson-to-mongo --input ./polygons.geojson --uri mongodb://localhost:27017/tracts --collection polygons

CLI Flags

See all of the CLI options.

./node_modules/.bin/geojson-to-mongo --help

    --input [path]       Required. Path to input geoJSON file
    --uri [uri]          Optional. Default "mongodb://localhost:27017/test"
    --collection [name]  Required. Collection to write to
    --drop-collection    Optional. Default false. Drop the collection before insertions

Mongoose Example

This example schema and schema method will work the tracts collection.

var mongoose = require("mongoose");
var Schema = mongoose.Schema;

var geoJSONSchema = new Schema({
  geometry: {
    type: {type: String},
    coordinates: []
  }
}, {
  collection: "tracts"
});

// Search for document intersecting lat/lng and return ONE.
// options.lat
// options.lng
geoJSONSchema.statics.findByLatLng = function (options, callback) {
  var lat = options.lat;
  var lng = options.lng;

  var query = {
    "geometry": {
      "$geoIntersects": {
        "$geometry": {
          type: "Point",
          coordinates: [options.lng, options.lat]
        }
      }
    }
  };

  this.findOne(query, callback);
};

module.exports = mongoose.model("tracts", geoJSONSchema);