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Now you can customize the main toolbar. There are many options that you can turn on and off:. The map toolbar is located just above the layers list. The is one of the most powerful features in the App Builder and it makes GIS application development a lot faster.

GIS for Web Developers: Adding Where to Your Web Applications

It allows you to create a tool and add it to the top menu ribbon. They allow the users to filter through the data, make changes on the map, do buffer and hotspot analysis and export data. You can choose from many pre-made tools or create a custom tool by adding JavaScript code. All of these tools make it easy to deploy GIS applications daily, adjust them at any time, and have as many apps as you want. Here are a few examples of tools you can create:.

Add a map and customize the toolbar You can add any map you already have in the Map Editor app. Add custom tools to the top menu The is one of the most powerful features in the App Builder and it makes GIS application development a lot faster. Event description. Read more Read less. Duration 10 days Who should attend?

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Turn Your Map Into a Cloud-based GIS App

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Chapter 1. GIS as a tool

Your message has been sent! The hardware was much cheaper and we no longer had to pay for ArcPad licensing. That savings made it feasible to develop our own software which did exactly what we needed and nothing more. We needed the ability for our field personnel to see on the map, which sites were due for an inspection, and the results of previous inspections. We needed our field personnel to be able to access the site access information as most sites were on private land.

Most importantly, we needed the software to do real-time validation to reduce the possibility of treatment application errors and the rules were different for each of the 18 municipalities we worked for. And we wanted the office staff to be able to see where the crew members were and who was working on any given day in order to assign tasks appropriately. In addition, cellular data coverage was spotty in some parts of our area so we needed the application to work even if a cellular data signal was not available.

Designing our own custom software with web GIS technology gave us the ability to meet all these requirements in a cost-effective manner. NET framework. NET framework and add-ins created with older versions would no longer work. On one occasion, I developed a tool to calculate species diversity as a favor in response to a post on a conservation list-serve that I am involved with.

GIS for Web Developers: Adding 'Where' to Your Web Applications - PDF Free Download

Several years later they contacted me and told me that the tool no longer worked in the latest version of ArcMap that they had installed. Some organizations even have strict restrictions about installing unauthorized software. And of course, some people are hesitant to try new software because of the learning curve, so even if you develop a QGIS plug-in, people may be hesitant to use it. If you can implement your tool with web GIS technologies, these problems disappear. It will be available to people whether they are using Windows, MacIntosh, Linux, or a mobile device.

Of course, not every tool is suitable for web GIS. Tools that require outputting a new dataset are more difficult to implement although not impossible. Tools that simply take input and produce an output table, report, or result set to display on a map on the other hand are generally easier. One of the first projects I was approached with when I began looking into web GIS involved a small one-person non-profit working to increase awareness of black bear activity in the small mountain town I was living in.

Every day this person would gather reports of bear sightings in town and make a map that would appear in the local daily newspaper. They were wondering what it would take to create a web site where citizens could add sightings themselves. Today I could implement a project like this in a few hours using open-source software with no cost other than a few dollars per month for web-hosting.

Introduction

Ten years ago, however, both my knowledge and available technology were far less advanced. ArcGIS online was still in its infancy and did not have anywhere near the capabilities that it does today.

GIS Application Developer - Blue Raster

It would have taken thousands of dollars in software and probably many weeks of my time to learn what I needed to implement this project and I was unable to convince my boss that the long-term benefits justified the cost to him. The difference is in the client-server architecture on which the web is built. Client-server architecture essentially means that there are many clients that interact with a single database on a server.

The web evolved in a bottom up fashion with little top down organization or control. Technologies that were adopted as standards were done so largely because they had the largest user-base. PHP, for instance, was developed by Rasmus Lerdorf for his own use on his personal web site. He never intended it to be a programming language, let alone to interact with databases. This bottom-up approach is the reason that there are so many different technologies and why programming on the client uses a completely different language than programming on the server unless you are programming on the server with Node.

This conglomeration of different technologies is often frustrating to people who are just beginning to learn web programming. Programming on the client has largely standardized on three general technologies. HTML provides structure for the web page and includes content. JavaScript is a full-fledged programming language that allows the programmer to perform calculations, respond to events, and generally allows the web-browser to do things other than simply display content. In terms of the web, the client is a web browser. There are also a myriad of general purpose libraries available that simplify using the three basic technologies.

There are also libraries available for specific purposes, such as mapping. Google Maps provides an API that allows you to interact with google maps by adding your own data, for example.

Leaflet and OpenLayers are open-source JavaScript libraries that each have specific advantages and disadvantages. In general leaflet is a simple, lightweight library that depends on community provided plug-ins for more advanced capabilities. This allows the programmer to pick and choose exactly which features they want to include. Open Layers is a more complete and fuller-featured library. No matter which mapping library you choose, the first thing most GIS users will want to do is put their own data on it. You can use JavaScript to interact with your own data, for instance by filtering it, searching for specific features, viewing feature attributes, zooming and panning, etc.

There is also an excellent JavaScript library called Turf. If all you need to do is to display static data on a map you can get by with only client-side technologies. You can store your data in GeoJSON format and load them onto the map, filter them by attributes, and perform spatial analysis on them.

You will also need to learn about server-side technologies and probably a different programming language as well to interact with the database. NET technology. You can also write server side code in JavaScript using Node. You can manage and interact with the same data on the server from most desk-top GIS software as well. PostGIS is by far, the most common spatial database extension in the open source world.

Spatially enabled databases generally add three primary functions. Your web cage can interact with the database using SQL commands.

Structured Query Language, or SQL allows you to create, modify, delete, and retrieve data stored in a database. While entire courses can and have been written about SQL, the basics are pretty simple and you can do a LOT with the basics.