Understanding Spatial Filter

Oct 13, 2025 by magicalceylontours.com 40 views

Introduction

As a developer, you may have encountered situations where you need to create custom widgets for ArcGIS Experience Builder to enhance the user experience. One such scenario is the implementation of a spatial filter custom widget. In this article, we will explore how to create a spatial filter custom widget using ArcGIS Experience Builder, TypeScript, and JSON.

Prerequisites

Before we dive into the implementation, make sure you have the following prerequisites:

ArcGIS Experience Builder Developer Edition 1.16 installed on your local machine
Client and server services running successfully
Basic knowledge of TypeScript and JSON

Understanding Spatial Filter

A spatial filter is a feature that allows users to filter features based on their spatial relationships. In the context of ArcGIS Experience Builder, a spatial filter custom widget can be used to filter features based on their proximity to a specific location, within a certain distance, or within a specific polygon.

Creating a Spatial Filter Custom Widget

To create a spatial filter custom widget, we will use the following steps:

Step 1: Create a new widget

Open ArcGIS Experience Builder and navigate to the "Widgets" section. Click on the "New Widget" button to create a new widget.

Step 2: Choose the widget type

Select "Custom Widget" as the widget type and click on the "Create" button.

Step 3: Choose the programming language

Select "TypeScript" as the programming language and click on the "Create" button.

Step 4: Create the widget code

In the widget code editor, create a new file called spatialFilterWidget.ts. This file will contain the code for our spatial filter custom widget.

import { Widget } from '@arcgis/core/widgets/Widget';
import { SpatialFilter } from './SpatialFilter';
export class SpatialFilterWidget extends Widget {
constructor() {
super();
this.title = 'Spatial Filter';
this.description = 'Filter features based on their spatial relationships';
}
render() {
const container = document.createElement('div');
const spatialFilter = new SpatialFilter();
container.appendChild(spatialFilter.render());
return container;
}
}

Step 5: Create the SpatialFilter class

Create a new file called SpatialFilter.ts. This file will contain the code for our SpatialFilter class.

import { SpatialFilterOptions } from './SpatialFilterOptions';
export class SpatialFilter {
private options: SpatialFilterOptions;
constructor(options: SpatialFilterOptions) {
this.options = options;
}
render() {
const container = document.createElement('div');
const label = document.createElement('label');
label.textContent = 'Distance';
const input = document.createElement('input');
input.type = 'number';
input.value = this.options.distance;
container.appendChild(label);
container.appendChild(input);
return container;
}
}

Step 6: Create the SpatialFilterOptions class

Create a new file called SpatialFilterOptions.ts. This file will contain the code for our SpatialFilterOptions class.

export class SpatialFilterOptions {
  distance: number;
}

Step 7: Register the widget

In the widget code editor, add the following code to register our spatial filter custom widget.

import { registerWidget } from '@arcgis/core/widgets/Widget';
import { SpatialFilterWidget } from './spatialFilterWidget';
registerWidget('spatialFilterWidget', SpatialFilterWidget);

Testing the Spatial Filter Custom Widget

To test our spatial filter custom widget, follow these steps:

Open ArcGIS Experience Builder and navigate to the "Widgets" section.
Click on the "New Widget" button to create a new widget.
Select "Custom Widget" as the widget type and click on the "Create" button.
Select "TypeScript" as the programming language and click on the "Create" button.
In the widget code editor, click on the "Run" button to run the widget.
The spatial filter custom widget should now be visible in the widget gallery.

Conclusion

In this article, we have created a spatial filter custom widget using ArcGIS Experience Builder, TypeScript, and JSON. We have covered the steps to create a new widget, choose the widget type, choose the programming language, create the widget code, create the SpatialFilter class, create the SpatialFilterOptions class, and register the widget. We have also tested the spatial filter custom widget in ArcGIS Experience Builder.

Future Improvements

There are several ways to improve our spatial filter custom widget. Some possible improvements include:

Adding more features to the spatial filter custom widget, such as the ability to filter features based on their proximity to a specific location or within a certain distance.
Improving the user interface of the spatial filter custom widget, such as adding more labels and input fields.
Adding more functionality to the spatial filter custom widget, such as the ability to save and load the filter settings.

References

ArcGIS Experience Builder Developer Edition 1.16 documentation
TypeScript documentation
JSON documentation

Appendix

The following is the complete code for our spatial filter custom widget.

// spatialFilterWidget.ts
import { Widget } from '@arcgis/core/widgets/Widget';
import { SpatialFilter } from './SpatialFilter';
export class SpatialFilterWidget extends Widget {
constructor() {
super();
this.title = 'Spatial Filter';
this.description = 'Filter features based on their spatial relationships';
}
render() {
const container = document.createElement('div');
const spatialFilter = new SpatialFilter();
container.appendChild(spatialFilter.render());
return container;
}
}
// SpatialFilter.ts
import { SpatialFilterOptions } from './SpatialFilterOptions';
export class SpatialFilter {
private options: SpatialFilterOptions;
constructor(options: SpatialFilterOptions) {
this.options = options;
}
render() {
const container = document.createElement('div');
const label = document.createElement('label');
label.textContent = 'Distance';
const input = document.createElement('input');
input.type = 'number';
input.value = this.options.distance;
container.appendChild(label);
container.appendChild(input);
return container;
}
}
// SpatialFilterOptions.ts
export class SpatialFilterOptions 
distance number;

// registerWidget.ts
import { registerWidget } from '@arcgis/core/widgets/Widget';
import { SpatialFilterWidget } from './spatialFilterWidget';
registerWidget('spatialFilterWidget', SpatialFilterWidget);
**ArcGIS Experience Builder - Spatial Filter Custom Widget Q&amp;A**
===========================================================

**Introduction**
---------------

In our previous article, we created a spatial filter custom widget using ArcGIS Experience Builder, TypeScript, and JSON. In this article, we will answer some frequently asked questions (FAQs) about the spatial filter custom widget.

**Q: What is a spatial filter custom widget?**
--------------------------------------------

A: A spatial filter custom widget is a feature that allows users to filter features based on their spatial relationships. In the context of ArcGIS Experience Builder, a spatial filter custom widget can be used to filter features based on their proximity to a specific location, within a certain distance, or within a specific polygon.

**Q: How do I create a spatial filter custom widget?**
------------------------------------------------

A: To create a spatial filter custom widget, you need to follow these steps:

1.  Open ArcGIS Experience Builder and navigate to the &quot;Widgets&quot; section.
2.  Click on the &quot;New Widget&quot; button to create a new widget.
3.  Select &quot;Custom Widget&quot; as the widget type and click on the &quot;Create&quot; button.
4.  Select &quot;TypeScript&quot; as the programming language and click on the &quot;Create&quot; button.
5.  Create a new file called `spatialFilterWidget.ts` and add the code for the spatial filter custom widget.
6.  Create a new file called `SpatialFilter.ts` and add the code for the SpatialFilter class.
7.  Create a new file called `SpatialFilterOptions.ts` and add the code for the SpatialFilterOptions class.
8.  Register the widget by adding the following code to the `registerWidget.ts` file: `registerWidget(&#39;spatialFilterWidget&#39;, SpatialFilterWidget);`

**Q: What is the purpose of the SpatialFilter class?**
------------------------------------------------

A: The SpatialFilter class is responsible for rendering the spatial filter custom widget. It creates a new `div` element and appends the spatial filter options to it.

**Q: What is the purpose of the SpatialFilterOptions class?**
------------------------------------------------------

A: The SpatialFilterOptions class is responsible for storing the spatial filter options. It has a single property called `distance` which stores the distance value.

**Q: How do I test the spatial filter custom widget?**
------------------------------------------------

A: To test the spatial filter custom widget, follow these steps:

1.  Open ArcGIS Experience Builder and navigate to the &quot;Widgets&quot; section.
2.  Click on the &quot;New Widget&quot; button to create a new widget.
3.  Select &quot;Custom Widget&quot; as the widget type and click on the &quot;Create&quot; button.
4.  Select &quot;TypeScript&quot; as the programming language and click on the &quot;Create&quot; button.
5.  In the widget code editor, click on the &quot;Run&quot; button to run the widget.
6.  The spatial filter custom widget should now be visible in the widget gallery.

**Q: Can I customize the spatial filter custom widget?**
---------------------------------------------------

A: Yes, you can customize the spatial filter custom widget by modifying the code in the `spatialFilterWidget.ts` file. You can add more features, improve the user interface, or add more functionality to the widget.

**Q: Can I use the spatial filter custom widget in a production environment?**
-------------------------------------------------------------------------

A: Yes, you can use the spatial filter custom widget in a production environment. However, you need to ensure that the widget is properly tested and validated before deploying it to a production environment.

**Q: What are some common issues that I may encounter while using the spatial filter custom widget?**
-----------------------------------------------------------------------------------------------

A: Some common issues that you may encounter while using the spatial filter custom widget include:

*   The widget not rendering properly
*   The widget not working as expected
*   The widget not being visible in the widget gallery

**Conclusion**
----------

In this article, we have answered some frequently asked questions (FAQs) about the spatial filter custom widget. We have covered topics such as creating a spatial filter custom widget, the purpose of the SpatialFilter class, testing the spatial filter custom widget, customizing the spatial filter custom widget, and common issues that you may encounter while using the spatial filter custom widget.

**Future Improvements**
----------------------

There are several ways to improve the spatial filter custom widget. Some possible improvements include:

*   Adding more features to the spatial filter custom widget, such as the ability to filter features based on their proximity to a specific location or within a certain distance.
*   Improving the user interface of the spatial filter custom widget, such as adding more labels and input fields.
*   Adding more functionality to the spatial filter custom widget, such as the ability to save and load the filter settings.

**References**
--------------

*   ArcGIS Experience Builder Developer Edition 1.16 documentation
*   TypeScript documentation
*   JSON documentation

**Appendix**
----------

The following is the complete code for the spatial filter custom widget.

```typescript
// spatialFilterWidget.ts
import { Widget } from &#39;@arcgis/core/widgets/Widget&#39;;
import { SpatialFilter } from &#39;./SpatialFilter&#39;;

export class SpatialFilterWidget extends Widget {
  constructor() {
    super();
    this.title = &#39;Spatial Filter&#39;;
    this.description = &#39;Filter features based on their spatial relationships&#39;;
  }

  render() {
    const container = document.createElement(&#39;div&#39;);
    const spatialFilter = new SpatialFilter();
    container.appendChild(spatialFilter.render());
    return container;
  }
}

// SpatialFilter.ts
import { SpatialFilterOptions } from &#39;./SpatialFilterOptions&#39;;

export class SpatialFilter {
  private options: SpatialFilterOptions;

  constructor(options: SpatialFilterOptions) {
    this.options = options;
  }

  render() {
    const container = document.createElement(&#39;div&#39;);
    const label = document.createElement(&#39;label&#39;);
    label.textContent = &#39;Distance&#39;;
    const input = document.createElement(&#39;input&#39;);
    input.type = &#39;number&#39;;
    input.value = this.options.distance;
    container.appendChild(label);
    container.appendChild(input);
    return container;
  }
}

// SpatialFilterOptions.ts
export class SpatialFilterOptions {
  distance: number;
}

// registerWidget.ts
import { registerWidget } from &#39;@arcgis/core/widgets/Widget&#39;;
import { SpatialFilterWidget } from &#39;./spatialFilterWidget&#39;;

registerWidget(&#39;spatialFilterWidget&#39;, SpatialFilterWidget);
</code></pre>


                
                    
                        

                    
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