With the December update of ArcGIS Online, the ability to reference other layers using Arcade Expressions in Pop-Ups was introduced. This blog is going to outline a quick example about how to create a simple intersect expression and display the results in a Pop-Up.

In this example I have used 4 layers marked as authoritative in ArcGIS Online by  Miami-Dade County, Florida. I want to display the Elementary, Middle and High School names which intersect with building footprints in a single pop-up. I have three layers of School Attendance Boundaries which identifies a specific school boundary which overlaps with many building footprints. The building footprint layer contains geometry information but no information about the infrastructure or zones that intersect with the building.

This Web Map shows examples of the information available in these layers in 4 separate layers.

Using the new Arcade FeatureSet functionality, I was able to include the Elementary, Middle and High School names in the building footprint pop up in this web map. 

Here are the steps to set up this simple intersecting Arcade Expressions to include in a pop-up.

1. Add all the desired layers with information that you would like to see to a web map.

2. Select the layer that should display the pop-up information (Building Footprint)

3. Inspect the School Attendance Boundary layers to identify the fields that you would like to display in the Building Footprint layer Name)

4. Select Configure Pop up and navigate to the Add Attribute Expressions

5. Create the expression for each layer.

   1. Create a variable that returns the FeatureSet of intersecting feature attributes.

      var intersectLayer =Intersects(FeatureSetByName($map,"Elementary School Attendance Boundary"), $feature)

      Expression Values Explained:

      var intersectLayer – specifies the intersecting features variable name

      Intersects – specifies the geometry function one feature intersects the geometry of the other specified layer.

      FeatureSetByName – Creates a FeatureSet from a Feature Layer based on its name within a map or feature service

      $map,"Elementary School Attendance Boundary"– identifies that the feature set is a layer named Elementary School Attendance Boundary, within the web map.

      $featureis the feature that is being selected in the Building Footprint layer that provides the initial spatial information.

       

         b.   Loop through the feature set created and return a specific field from the feature set:

for (var f in intersectLayer){

    return f.NAME

}

6. Once all expressions are created, add them to the pop up configuration.

7. Disable the pop ups and potentially the visibility from the School Attendance Boundary Layers (Not required, but I think it cleans up the display,

8.Check out your pop up with information from intersecting layers.

There will be more documentation, blogs and examples coming out in the next week, but try out this quick sample with simple intersecting layers and let us know if you have questions.

Entire expression for a single high school name:

 

var intersectLayer =Intersects(FeatureSetByName($map,"Elementary School Attendance Boundary"), $feature)

for (var f in intersectLayer){
return f.NAME
}

Learn about all the great new enhancements to ArcGIS Online in this blog by Bernie Szukalski,

What's New in ArcGIS Online (December 2018)

Get more details in the What's new help topic, What's new—ArcGIS Online Help | ArcGIS 

Enjoy,

ArcGIS Online will be updated the evening of December 5th PST. There is a lot of useful functionality packed into this update, including some user interface updates, licensing changes and changes to administrative workflows. This article will describe the upcoming changes to the look and feel of ArcGIS Online while this related blog reviews concepts about the next evolution of licensing, User Types. We understand that changes to workflows and the look and feel of software that you use daily can be disruptive. For this reason, we want to provide you with a quick preview of the updates, so you are prepared and excited for the morning of December 6^th.

Check out the details in this ArcGIS Blog and comment below:

https://www.esri.com/arcgis-blog/wp-content/uploads/2019/11/NavigationUpdateGif.gif

Have you gotten a chance to see what's new in ArcGIS Online? New configurable apps, analysis tools, and features are ready for you to use! Many quality improvements were also made.

Here are a few ways to learn about our September 2018 update:

1. Overview blog
2. List of all the blogs related to the update
3. Help documentation explaining everything in the update
4. List of fixed bugs

ArcGIS Online Update Planned for Tonight, September 18 

On September 18, we plan to update ArcGIS Online. Here are four capabilities you can look forward to:

• Measure Distributions and Detect Concentrations
  • Measure the distribution of a set of features using the new Summarize Center and Dispersion tool. The tool can be used to calculate characteristics such as the center or compactness and orientation of dispersion, track changes in distribution over time, and compare distributions of different features.
  • Detect areas where points or events are concentrated and where they are separated using the new Find Point Clusters tool. 
• Calculate Field Values using Arcade
  • Arcade can be used to calculate field values for hosted feature services. The functions, constants, and field values you currently use when building expressions for popups, labels, and visualizations can now be used to calculate field values.
• Visualize 2D and 3D with new Configurable App
  • Scene with Inset Map showcases 3D and 2D maps in a single configurable application. The primary map visualizes elevation and a 2D inset provides orientation and context.
• Search and Display 3D Features
  • Scenes can be configured so that when a feature is searched, Scene Viewer quickly finds and highlights the feature, and displays its pop-up.

Please note that all planned updates are subject to change. We will provide a comprehensive list of all implemented changes in our upcoming What’s New email and blog post.

Customized ArcGIS Online Agenda

The ArcGIS Online team prepared many technical workshops and demo theater presentations for the upcoming User Conference. To make it easy to see what is available and when, we’ve created a customized ArcGIS Online agenda. You can download it at the end of this article. The agenda includes six sections:

• Introductions: get started with capabilities like spatial analysis, and learn the benefits of Web GIS.
• Capabilities: dive deeper into capabilities like Smart Mapping, map styles, and 3D web scenes.
• Apps: see what you can create using configurable apps, app templates, and Web AppBuilder.
• Administration: learn best practices for configuring your organization, administering members, and using your own authentication system.
• Advanced Workflows: get best practices for setting up high demand layers, pop-ups, and publishing services, layers, and maps.
• What’s New & Coming: discover what’s been added and improved, and learn what’s planned for future updates.

Three technical workshops you don’t want to miss:

1. Best Practices for High Demand Layers: Web mapping applications provide spatial context for current events, news stories and public information, sometimes generating large amounts of web traffic. ArcGIS Online’s cloud infrastructure can scale to meet the needs of high demand apps, receiving hundreds of thousands of requests. This session reviews best practices of layer types, layer and web map configurations, and sharing settings that help popular (viral) apps take advantage of ArcGIS Online’s scalable architecture. See the schedule.
2. Steps for Success for your ArcGIS Organization: A Best Practices Approach: Your ArcGIS organization is an integral part of your GIS ecosystem, enabling you to reach a broad audience that includes GIS professionals, decision makers, knowledge workers, your mobile workforce, and the public. Using real world examples presented in a step-wise fashion, this fast-paced workshop offers guidance, tips, and details best practices that will enable you to create a successful and vibrant organization that meets your needs and goals. Whether you’ve already lifted your organization, or are just beginning to think about it, you’ll get ideas on how to configure it for the best experience and results, and how to engage users of all types successfully.  See the schedule. 
3. Explore Your Data with Smart Mapping: Learn about the exciting new enhancements behind our Smart Maps initiative for ArcGIS Online. See how we've re-envisioned mapping through data-driven workflows, intelligent defaults, coordinated styling, automated scale ranges, new thematic renderers, and streamlined interfaces. Smart Mapping allows experts and novices alike to work faster, with more confidence and less effort. See the schedule.

ArcGIS Online in the Expo

Stop by the ArcGIS Online Area in the Expo where you can:

• Get your questions answered
• Show us your work. We’d love to see the cool things you are doing with ArcGIS Online!
• See demos of the latest updates and features.
• Give us your ideas on how we can improve ArcGIS Online

Download the focused agenda to help you identify ArcGIS Online topics that interest you. We’ll see you in San Diego for an excellent week!

Do you constantly wish for better ways to organize ArcGIS content based on subject matter and descriptive qualities rather than just the item type and last modification date? Do you want to find your roads feature layer with 2012 data rather than looking for layers that were created in 2012?

The April 2018 update of ArcGIS Online*  introduced the ability to assign user-defined categories to items, creating thematic parameters that can be used as filters to refine search results and browsing experiences. Content categories enable administrators, group managers and users with the manage categories privilege to build a categorical schema for content that can then be used by members to categorize their items thematically.

Check out the rest of this article here and let us know how you will use content categories in the comments below.