Mark Harrower

Map nerd. Passionate about great design, teaching, and doing cool things with data.

Posts by this author
Blend Modes are here and they’re pretty awesome

Map Viewer Beta offers advanced color and blending controls for map layers to help you quickly create new visual effects.

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How to get the most from interactive maps

How much interactivity to include in your map is a central question in modern cartography.

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What is an express map and why should you use one?

All stories happen somewhere. Here's how to easily add slick-looking maps in ArcGIS StoryMaps.

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Getting the most from animated maps

Maps that move can be a powerful star of the story, but knowing when to deploy them is key.

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To 3D or not to 3D?

Both 2D and 3D maps are great, but knowing when to use them—and why—is key.

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Smart Mapping Part 5: Tips and Tricks

Whenever possible, Smart Mapping aims to offload work from the map author to the machine. The goal is not to take control away from the a...

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Smart Mapping Part 4: Pairing Data with Maps

There are many kinds of thematic maps and each is highly flexible in its design. This variety is a blessing because we can tell a seeming...

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Maps We Love: How to make great maps that engage and inspire

You don’t have to be a cartographer to know that maps are everywhere. The demand for maps has never been greater–most people use maps...

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Smart Mapping Part 3: Rounding classes for Color and Size drawing styles

(By Adelheid Freitag, ArcGIS Online development team) Esri’s smart mapping initiative helps to add professional touches to your maps...

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