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St. Louis Imagery – 1990 to Now

What kind of changes to the built environment happened in your city within the past 25 years? Looking at and comparing aerial imagery can be an informative and compelling way to investigate changes. In St. Louis, many large building developments have happened over the years including: The St. Louis Arena Demolition The building and opening […]

Custom Web AppBuilder Widgets in TypeScript

If you’re a JavaScript developer, you may have heard of TypeScript, a typed superset of JavaScript that compiles to plain JavaScript. If you’re also creating custom Web AppBuilder widgets, using TypeScript in a widget is a great way to get started with TypeScript. Here are a few notes and tips that I’ve discovered while using […]

Extending Widgets in ArcGIS Web AppBuilder

I’ve had many requests and ideas for Web AppBuilder widgets over the past few years, and many times they are ideas that are building on an existing widget. For example, a query widget that is custom to a particular workflow, an edit widget that enforces certain geometry movement restrictions, or maybe adding a few more […]

Release Your New Web AppBuilder Widget in Four Steps

So you just wrote a great Web AppBuilder widget, and want to release it to the world so everyone can benefit. Create the Widget First create your widget, preferably using the¬†generator-esri-appbuilder-js Yeoman Generator. That way your settings will be correct, your manifest.json file will be filled out, and your files will be in a great […]

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Gavin Rehkemper

JavaScript, WordPress, and GeoDev