Tag GIS

Published Web App

Last week Missouri got a lot of rain, which caused flooding in the Meramec river valley near St. Louis. I received a link to an ArcGIS Image Service that Surdex had created and provided that showed the flooding as of Tuesday 5/2. They flew this imagery as a service to the government and first responders, hoping to help those affected quicker and more efficiently.

Open Data in University City

I live in University City, MO, which has no crime. Don’t believe me? This map says so.

Extending Widgets in ArcGIS Web AppBuilder

I’ve had many requests and ideas for Web AppBuilder widgets over the past few years, and many are ideas that build on an existing widget. Most developers will copy the original out-of-the-box (OOTB) widget, rename it, and then start development from there. Which is great because it gets you moving quickly. But is this really the best way to do things?

St. Louis Bike Trails with Open Data from Great Rivers Greenway

2016 was a year of biking for my wife and me. We biked many trails in St. Louis, and even did part of the Katy Trail. So when I saw St. Louis City alderman Scott Ogilvie tweeting about Great Rivers Greenway, the trails organization in the St. Louis area, I started wondering what the future of St. Louis trails will be.

Team Basemaps

Team Basemaps is a web app that allows you to choose your favorite team, cycle through the team colors to get the map looking exactly like you want, and then save it to your ArcGIS Online account to use in maps. It uses the Vector Tile Layers in combination with the new ArcGIS JavaScript API 4.0. I’d love to see your favorite basemap color combinations - please send them over!

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. Here are a few steps to follow.

Custom Basemap Toggle with ArcGIS JavaScript API 4 View Models

I am super excited about the ArcGIS Maps SDK for JavaScript 4.0 beta. One of the exciting things is developer friendly widgets which allows us to write our own presentation layer, and still use the logic of the core widget (the “View Model”). For example, the View Model for the Basemap Toggle Widget allows you to call toggle() and get the current/secondary basemaps, all from your own module that implements the view.

This Week in Esri GitHub

Esri has opened up a bunch of repositories on GitHub this past week.

The Geography of Basketball: Mapping NBA Shotcharts in ArcGIS

Here, I want to show how you can use Python to push this data into a Geographic Information System, ArcGIS. From there, you can leverage concepts, tools, and applications that are generally reserved for geography and geographers to make some great visuals from NBA player shot chart data. (A guest post by Gregory Brunner)

GeoJSON Viewer

You have a URL to a GeoJSON file, and you want to quickly view the data spatially. Use this simple tool I just published on GitHub - GeoJSON-viewer.