Geospatial applications created using java script(and nosql)

SLIDE: 2 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. Agenda ▪ What is full stack JavaScript and why should you care? ▪ What is geospatial data? ▪ How is this related to NoSQL and databases? ▪ JSON data ▪ Server Side JavaScript ▪ Node.js ▪ Demo

SLIDE: 5 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. A bit more on JavaScript ▪ JavaScript has been around, it is here now and will be here for a while (whether you like it / use it or not) ▪ Ruling the browser since ‘95

<html> <body> <script src="jquery.js"></script> <script> $.ajax({ url: "/items" }).done(function(html) { $("#results").append(html); }); </script> </body> </html> AJAX & jQuery era ● Asynchronous requests to websites ● Page updates & data loads, without the need to reload the site ● First real step towards interactive websites

SLIDE: 7 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. The evolution of JS frameworks / libraries ▪ And a ‘few’ frameworks and libraries followed ▪ AngularJS ▪ Ember ▪ Knockout ▪ React ▪ Backbone ▪ Dojo ▪ ExtJS ▪ D3.js ▪ Velocity ▪ etc etc etc

var http = require('http'); var server = http.createServer(function(request, response) { response.writeHead(200, { 'Content-type': 'text/plain' }); response.write('hello node'); response.end(); }); server.listen(8080); JavaScript at the server-side ● Ubiquity in the browser had trickled down the stack ● You can run JavaScript at the server-side ● It’s fast - asynchronous & non-blocking

SLIDE: 9 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. The future of JavaScript ▪ JavaScript has a prosperous future ES6/2015 and ES7/2016 ▪ classes ▪ arrow functions ▪ string templates ▪ promises ▪ object destructuring ▪ array includes ▪ async functions ▪ rest parameters

SLIDE: 10 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. Geospatial data - data represents geographical information which can include site locations (as well as vectors and raster data) - (site) locations are made up of (geospatial) points - (geospatial) points can be placed on a coordinate system and they consist of a pair of latitude and longitude values

SLIDE: 12 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. Exif data Exchangeable image file format (standard) - metadata about images (and sounds) - make, model, orientation, exposure time, creation date, focal length, … - with location services on: GPS data

SLIDE: 14 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. Application Architecture User Interface ● Data views ● User workflow ● Browser Middle-tier ● Business rules ● Application logic JSON over HTTP Pros ● Same language throughout the stack ● Lightweight data format ● Data format ‘natively’ understood by JavaScript Con(s) ● Missing persistent data storage

SLIDE: 15 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. Application Architecture User Interface ● Data views ● User workflow ● Browser Middle-tier ● Business rules ● Application logic JSON over HTTP Wouldn’t it be nice to add a database to this architecture that can: ● store JSON documents natively (along with XML, binary and RDF)? ● allow you to construct queries using JavaScript? ● have ACID properties instead of eventual consistency? ● Give you all the indexes you need and allow you to execute search out of the box? ● Apply role based, document level security? ● Execute SPARQL queries? ● Manage the database via REST API calls?

SLIDE: 16 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. Application Architecture User Interface ● Data views ● User workflow ● Browser Middle-tier ● Business rules ● Application logic JSON over HTTP MarkLogic can: ● store JSON documents natively (along with XML, binary and RDF) ● allow you to construct queries using JavaScript ● have ACID properties instead of eventual consistency ● Give you all the indexes you need and allow you to execute search out of the box ● Apply role based, document level security ● Execute SPARQL queries ● Manage the database via REST API calls JSON/XML over HTTP Database-tier ● Persistent storage

SLIDE: 17 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. - support for WGS84 coordinate system as well as raw coordinate system - support for geospatial queries, indexes and shapes - points, (complex) polygons, circles, boxes - support for Well-Known Text (WKT) and Well-Known Binary (WKB) representation of geospatial data - point, linestring, triangle, multipoint, multilinestring, multipolygon, geometrycollection Geospatial data in MarkLogic

var latitude = 10.3910; var longitude = -75.4794; var miles = function(distance) { return distance * 1.60934 }; cts.search(cts.jsonPropertyChildGeospatialQuery('location', 'coordinates', cts.circle(miles(5), cts.point(latitude, longitude)) )); Server-side JavaScript in MarkLogic ● Runs on Google’s V8 engine (JavaScript compiler) ● Allows you to execute JavaScript code close to your data (“stored procedures”) ○ both native JavaScript (including some ES2015) and proprietary JavaScript

var marklogic = require('marklogic'); var db = marklogic.createDatabaseClient (connection); var qb = marklogic.queryBuilder; db.documents.query( qb.where( qb.geospatial( qb.geoProperty( qb.property('location'), qb.property('coordinates')), qb.circle(10, 10.3910, -75.4794) ) ) ).result().then(function(response) { console.log(response); }); Node.js Client API ● Registered npm package ● Focus on application features rather than plumbing: ○ read/write (bulk), patch (updates), queries, projections, extensions, alerting, semantics … ● Supports all geospatial query types

SLIDE: 21 © COPYRIGHT 2016 MARKLOGIC CORPORATION. ALL RIGHTS RESERVED. Resources - Get the database for free! - GeoPhoto (GitHub) - Samplestack (GitHub) - Character Search v1 (GitHub) - Character Search v2 (GitHub) - MarkLogic Java API (GitHub) - MarkLogic Node.js API (GitHub) - How is MarkLogic different from MongoDB? (Article) - Free Training - More on MarkLogic’s Node.js API (free training)

Geospatial applications created using java script(and nosql)

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Geospatial applications created using java script(and nosql)