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Inserting GIS Objects

In this article by Angel Marquez author of the book  PostGIS Essentials see how to insert GIS objects. Now is the time to fill our tables with data. It's very important to understand some of the theoretical concepts about spatial data before we can properly work with it. We will cover this concept through the real estate company example, used previously. Basically, we will insert two kinds of data: firstly, all the data that belongs to our own scope of interest. By this, I mean the spatial data that was generated by us (the positions of properties in the case of the example of the real estate company) for our specific problem, so as to save this data in a way that can be easily exploited. Secondly, we will import data of a more general use, which was provided by a third party. Another important feature that we will cover in this article are the spatial data files that we could use to share, import, and export spatial data within a standardized and popular format called shp or Shape files. In this article, we will cover the following topics: Developing insertion queries that include GIS objects Obtaining useful spatial data from a public third-party Filling our spatial tables with the help of spatial data files using a command line tool Filling our spatial tables with the help of spatial data files using a GUI tool provided by PostGIS

Structure of Applications

In this article by Colin Ramsay , author of the book  Ext JS Application Development Blueprints , we will learn that one of the great things about imposing structure is that it automatically gives predictability (a kind of filing system in which we immediately know where a particular piece of code should live). The same applies to the files that make up your application. Certainly, we could put all of our files in the root of the website, mixing CSS, JavaScript, configuration and HTML files in a long alphabetical list, but we'd be losing out on a number of opportunities to keep our application organized. In this article, we'll look at: Ideas to structure your code The layout of a typical Ext JS application Use of singletons, mixins, and inheritance Why global state is a bad thing Structuring your application is like keeping your house in order. You'll know where to find your car keys, and you'll be prepared for unexpected guests.

Third Party Libraries

In this article by Nathan Rozentals , author of the book Mastering TypeScript , the author believes that our TypeScript development environment would not amount to much if we were not able to reuse the myriad of existing JavaScript libraries, frameworks and general goodness. However, in order to use a particular third party library with TypeScript, we will first need a matching definition file. Soon after TypeScript was released, Boris Yankov set up a github repository to house TypeScript definition files for third party JavaScript libraries. This repository, named DefinitelyTyped ( ) quickly became very popular, and is currently the place to go for high-quality definition files. DefinitelyTyped currently has over 700 definition files, built up over time from hundreds of contributors from all over the world. If we were to measure the success of TypeScript within the JavaScript community, then the DefinitelyTyped repository would be a good indication of how well TypeScript has been adopted. Before you go ahead and try to write your own definition files, check the DefinitelyTyped repository to see if there is one already available. In this article, we will have a closer look at using these definition files, and cover the following topics: Choosing a JavaScript Framework Using TypeScript with Backbone Using TypeScript with Angular

Using networking for distributed computing with openFrameworks

In this article by Denis Perevalov and Igor (Sodazot) Tatarnikov , authors of the book openFrameworks Essentials , we will investigate how to create a distributed project consisting of several programs working together and communicating with each other via networking.

Moving from Foundational to Advanced Visualizations

This article is written by Joshua N. Milligan , the author of Learning Tableau . You are now ready to set out on a journey of building advanced visualizations! "Advanced" does not necessarily mean difficult. Tableau makes many of these visualizations easy to create. Advanced also does not necessarily mean complex. The goal is to communicate the data, not obscure it in needless complexity.

Adding and Editing Content in Your Web Pages

This article by Miko Coffey , the author of the book, Building Business Websites with Squarespace 7 , delves into the processes of adjusting images, adding content to sidebars or footers, and adding links.


Humans are visual creatures and have evolved to be able to quickly notice the meaning when information is presented in certain ways that cause the wiring in our brains to have the light bulb of insight turn on. This "aha" can often be performed very quickly, given the correct tools, instead of through tedious numerical analysis. Tools for data analysis, such as pandas, take advantage of being able to quickly and iteratively provide the user to take data, process it, and quickly visualize the meaning. Often, much of what you will do with pandas is massaging your data to be able to visualize it in one or more visual patterns, in an attempt to get to "aha" by simply glancing at the visual representation of the information. In this article by Michael Heydt , author of the book Learning pandas we will cover common patterns in visualizing data with pandas. It is not meant to be exhaustive in coverage. The goal is to give you the required knowledge to create beautiful data visualizations on pandas data quickly and with very few lines of code.

Managing Images

Cats, dogs and all sorts of memes, the Internet as we know it today is dominated by images. You can open almost any web page and you'll surely find images on the page. The more interactive our web browsing experience becomes, the more images we tend to use. So, it is tremendously important to ensure that the images we use are optimized and loaded as fast as possible. We should also make sure that we choose the correct image type. In this article by Dewald Els , author of the book  Responsive Design High Performance ,we will talk about, why image formats are important, conditional loading, visibility for DOM elements, specifying sizes, media queries, introducing sprite sheets, and caching.

High Availability, Protection, and Recovery using Microsoft Azure

Microsoft Azure can be used to protect your on-premise assets such as virtual machines, applications, and data. In this article by Marcel van den Berg , the author of Managing Microsoft Hybrid Clouds , you will learn how to use Microsoft Azure to store backup data, replicate data, and even for orchestration of a failover and failback of a complete data center. We will focus on the following topics: High Availability in Microsoft Azure Introduction to geo-replication Disaster recovery using Azure Site Recovery

Getting Ready with CoffeeScript

In this article by Mike Hatfield , author of the book, CoffeeScript Application Development Cookbook , we will see that JavaScript, though very successful, can be a difficult language to work with. JavaScript was designed by Brendan Eich in a mere 10 days in 1995 while working at Netscape. As a result, some might claim that JavaScript is not as well rounded as some other languages, a point well illustrated by Douglas Crockford in his book titled JavaScript: The Good Parts , O'Reilly Media . These pitfalls found in the JavaScript language led Jeremy Ashkenas to create CoffeeScript, a language that attempts to expose the good parts of JavaScript in a simple way. CoffeeScript compiles into JavaScript and helps us avoid the bad parts of JavaScript.

Dealing with Legacy Code

In this article by Arun Ravindran , author of the book Django Best Practices and Design Patterns , we will discuss the following topics: Reading a Django code base Discovering relevant documentation Incremental changes versus full rewrites Writing tests before changing code Legacy database integration

Getting Started

In this article by Mark Dunkerley , author of the book  Learning AirWatch , you will get a full understanding of all the tools included in Enterprise Mobility Management ( EMM ) with AirWatch by VMware's mobile management suite. We will go through each of the toolsets available to ensure that you understand what is available and how to set up and configure each of them. The intention of this article is not to dive into extreme detail of AirWatch's EMM but to give you the knowledge needed to understand, represent, and set up the configurations. Understand that the mobile space is an extremely fast-growing market and some of the information might have already been updated. The information presented in this article is current as of AirWatch 7.3. In this article, we will take a look at what is needed to get started with AirWatch; we will explore the different licensing options and what hosting methods are available with support. We will also look at the different types of devices that are supported along with the different profile options to manage the devices. The following will be covered in this article: An overview of AirWatch Management suite options Hosting options Support options Learning and deployment services Supported devices Device ownership

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