Getting started with programming: CodeAcademy

Posted: March 28, 2012 | Author: | Filed under: Introductory Topics, Learning Resources | Tags: , , | Comments Off on Getting started with programming: CodeAcademy

The interactivity and aesthetics of the modern Web would not be possible without JavaScript. The web runs on JavaScript. JavaScript is also one of the best languages to develop your custom web maps; it’s cross-platform, there’s no cost of entry, and it’s easy to learn.

If you have little to no programming experience, check out CodeAcademy. This site will walk you through basic programming concepts and build your knowledge towards being able to construct awesome JavaScript-driven web sites. If you create a free account on CodeAcademy, it will keep track of your progress; this is recommended as CodeAcademy has plenty to offer.

Leaflet

Posted: January 31, 2012 | Author: | Filed under: Application Programming Interfaces | Tags: , , , , , , | Comments Off on Leaflet

Leaflet is a JavaScript-based API for web mapping that is designed to support both desktop and mobile platforms. Developed by CloudMade, a big supporter of OpenStreetMap, Leaflet looks to be an awesome library for you to construct your maps.

Leaflet allows you to do the basics, of course, such as popup an information window and overlay your own data. It can do far more than that and is a viable replacement for Google Maps. The functionality brought by Jason Sanford’s Leaflet Vector Layers is a real selling point for me. Geocommons are ArcGIS Online are two easy ways for people to get their data on the web. Leaflet Vector Layers then makes pulling that data into a web map simple. The Vector Layers plugin also makes Arc2Earth data available to you. Arc2Earth is a great tool for helping you move your data off of the desktop on to a cloud-based service. They have been doing some amazing work with storing geospatial data in Google Fusion Tables. However you share your data on the web, Leaflet can bring it in to a web map and display it. If it’s easy to code and produces something that is easy to use and aesthetically pleasing, it’s going to be a big success.

I am working on a project at Rowan where we are looking to make an interactive campus map that will zoom down to the room level, displaying floor plans of the buildings on campus. The flexibility and the cross-platform functionality of Leaflet means that I will seriously consider using this Library to power the user interface of the map. I was originally thinking about OpenLayers, but Leaflet seems powerful enough to do all that I require.

Hat tip to Andrew Turner for the pointer to Leaflet Vector Layers.

Mapstraction API

Posted: January 26, 2012 | Author: | Filed under: Application Programming Interfaces, Learning Resources | Tags: , , , | Comments Off on Mapstraction API

The Mapstraction JavaScript API allows you to easily switch between the leading web map providers for your application. This allows you to code for just one API but tap into the resources and base maps provided by other APIs.

From the Mapstraction site:

Users can switch maps as desired based on personal taste and quality of maps in their local area. Various tools built on top of Mapstraction allow users to easily integrate maps into their own sites, and configure them with different controls, styles, and provider.

One tool they have provided is an API Sandbox, allowing you to view examples of Mapstraction in action, but with the code exposed to you in an editable text box. You can modify the JavaScript and see how your changes will appear in the map below. This is a great benefit to those looking to tinker with the API.

Another resource for learning how to make web maps is Map Scripting 101 by Adam DuVander. The book focuses on Mapstraction, using the API as the primary means of demonstrating JavaScript-based web mapping technology. I have not yet had the chance to read the book, but once I do, I will review it here. In addition to the Map Scripting 101 book, DuVander also provides a simple, concise “Start Here Guide” for those completely new to web mapping. The Guide is freely available through the link above.

I plan to discuss Mapstraction more over the next few posts. With Google’s recent change to their API Terms, many are switching from the Google Maps API and Mapstraction will undoubtably play a role in some users’ transition schemes.

Dymaxion Web Mapping

Posted: January 25, 2012 | Author: | Filed under: Application Programming Interfaces, Web Map Examples | Tags: , , , , | Comments Off on Dymaxion Web Mapping

R. Buckminster Fuller was truly a modern Renaissance Man. Bucky created many inventions and championed several ideas that have shaped the way we live. One of his creations is the Dymaxion map projection. The map projection is rather complex; the developable surface is an icosahedron. When the icosahedron is then sliced and flattened, it produces a world map that is visually intriguing. It is truly unlike any other map projection.

Though difficult to produce, the code for producing such a projection in a web map is available. Using the OpenLayers JavaScript API and some custom JavaScript from Protovis, Zachary Johnson was able to put together this demo of the Fuller/Dymaxion Projection as the projection for a web map.

In Zachary’s post, he also mentions the Faumaxion web map, which is a Flash-based web map that reorients itself so that north is at the top for any of the triangular faces of the Dymaxion projection. Michal Migurski, a partner at Stamen Design, has the details on how he created the Dymaxion slippy map.

The downside to using a Dymaxion projection in your web map is that the support for the projection amongst the mapping APIs is minimal. You will need to do more of the heavy lifting in order to get this projection working properly in your web map. That’s also ignoring the fact that many people are not spatially aware and that this different projection will require your audience to orient themselves with the way the Earth has been projected. While Spherical Mercator is common and familiar, it does grossly exaggerate the areas closer to the poles, which in turn distorts your mapped data. Choropleth maps depicting a variable dependent on area, such as population density, are often misleading when mapped with a Mercator projection. The Dymaxion map is closer to an equal-area map than most, however the variable orientation towards North makes this projection a hard sell to a general audience.

Nonetheless, the Dymaxion map is an incredible map projection, from both a scientific and aesthetic point of view. The time spent by some very dedicated, intelligent people to get this working in interactive form speaks to the admiration of the projection and its creator. If only Bucky had lived long enough to see what wonders the Internet hath brought…

New to Web Mapping? Get started with Google’s Mapping APIs

Posted: January 24, 2012 | Author: | Filed under: Application Programming Interfaces | Tags: , , , , , | Comments Off on New to Web Mapping? Get started with Google’s Mapping APIs

If you have no experience with web mapping, but have some basic website-building experience, you can begin to make interactive web maps fairly easily using Google’s mapping application programming interfaces (APIs).

Google’s map API page shows you the available APIs for you to use. If you are looking to make maps like those you often see depicting store locations or basic points-on-a-map pages, check out the JavaScript API. There are many tutorials out there to help you get started with mapping, however all of them assume you are familiar with hosting your own web pages. If you’re not sure how to host your own pages, you can still get started with web mapping by using the My Maps functionality of Google Maps.

There are also several other JavaScript-based APIs for mapping, such as OpenLayers, Mapstraction, and ESRI’s JS API. All of these will allow you to embed maps with custom content into your own web pages, however each one has a different learning curve and provide different base maps out of the box.