Tag: JavaScript

Data Visualization with ArcGIS API for JavaScript: Show Data by Color

Mapping data values by varying the color has been the most popular way to visualize geospatial data. Academically it is called choropleth by cartographers. If you do an image search for “US population map” online, 90% of the results would be choropleth maps. In this post, we will look at this well-known mapping technique, and learn how you can create a map with our contemporary, easy-to-use API.

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ArcGIS API for JavaScript Version 3.11 Released

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Version 3.11 of the ArcGIS API for JavaScript is now available! Below is a listing of 14 new features, enhancements and changes included in this release. For a complete list with API enhancements and bug fixes, check out the What’s … Continue reading

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The GeoForm Graduates

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Need to gather some simple information and put it on a map? The GeoForm is a configurable web mapping application template for form-based data editing of a Feature Service through the web browser. This application allows users to enter data through a form instead … Continue reading

Posted in Apps, ArcGIS Online, Developer, Electric & Gas, Public Safety, State Government, Telecommunications, Transportation, Water Utilities | Tagged , , , , | 6 Comments

Data Visualization with ArcGIS API for JavaScript: Enhancement Options

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In the previous posts, we already learned how to display your data, and how to style your data by unique value with JavaScript API. You might feel content with simply displaying data on a map, but your audience may expect something beyond this. Where can they find the legend? What if they want more information about each feature on the map?

In this post, you will learn how to:

  • Use pop-up to provide additional information
  • Add legend
  • Trigger actions when a graphic is clicked

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Data Visualization with ArcGIS API for JavaScript: Show Data by Unique Value

In the first post of this series, I mentioned a good way to determine which way to visualize your data is to ask questions about the purpose of the map. In addition to “where things are,” which we already examined in that post, you may also want answer questions like:

  • What chain does each restaurant belong to in my city?
  • What is the most predominant crop of each county in the US?
  • What level of crime risk does each census tract have?

Unique value renderer is good for answering your what questions.

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Data Visualization with ArcGIS API for JavaScript

In the past year, we added some powerful, innovative, easy-to-use graphic drawing functionality in the ArcGIS API for JavaScript. Along with existing capabilities of the API, now you can easily create effective data visualizations on the map with a few lines of code. In this blog series, we will walk through various visualization capabilities in the API, and learn how you can utilize them to visualize your data.
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ArcGIS API for JavaScript Version 3.10 Released

Version 3.10 of the ArcGIS API for JavaScript is now available! Below is a complete listing of new features, enhancements and changes included in this release. The same information is available in the What’s New in 3.10 page in the SDK.
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Come geek out with us at the UC

More cowbell!

Come SpeedGeeking with us at the 2014 Esri User Conference! As a developer-focused activity, SpeedGeeking gets its name and style from speed dating. SpeedGeeking features 12 presenters who, at the same time, will be giving lightning talks to a group … Continue reading

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Impact Summary: Dazzle Them With Your Data

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Esri’s Disaster Response Program helps support worldwide incidents, such as earthquakes, floods, wildfires, and severe weather. To increase public knowledge of the disaster impacts, we wanted an app to highlight areas and show related statistics, such as data that shows … Continue reading

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ArcGIS API for JavaScript Web Optimizer in public beta

The ArcGIS API for JavaScript Web Optimizer is a web application that generates custom builds of Esri’s JavaScript API. Today, we’re happy to announce that the web optimizer is in public beta and available to all with an organizational or developer account in ArcGIS Online.
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