ArcGIS Pro

Blending a balance between imagery and cartography...cartimagery

Here is a look at the luscious World Imagery basemap. Who wouldn’t love the literal and accurate context of a basemap like this?

World Imagery basemap.

On the other hand, here is an extract of the tenderly hand-wrought cartographic terrain basemap, Natural Earth, from Tom Patterson.

Natural Earth terrain and landcover basemap.

Two outstanding choices! What’s a map maker to do? Each has its merits and limitations. If only there was a way to break free from the binary choice of one vs the other; if we could just blend th—ohhhhhhh, ok, hang on a second. Yeah. Let’s blend them.

Blended combination of imagery and cartography.

Right? With blending, it’s more like the two choices just become the ends of a gradient, and you can find a balance somewhere between the to, to best suit your map. And because we’re actually mathematically blending the pixels of these inputs, rather than applying a simple transparency, we have so much control and fun awaiting us…

0:00 Clearly this hair was cut at home.

0:07 Introducing the cast.

0:26 Embarrassingly low energy…it was first thing in the morning.

0:47 Adventures in hybridizing terms.

0:55 Simple transparency? Nah!

1:47 The Luminosity blend mode merges the textures of a layer (cartographic) with the colors below it (imagery).

2:30 Duplicating the cartography layer and trying out the Overlay blend mode. Too contrasty!

2:59 Soft Light is a gentler version of Overlay; works well here. One of the most useful of the blend modes.

3:15 Still too washed out, so time to add a darkening blend mode: Multiply.

3:56 Looks good! A gentle merging of the two original options.

So crack open blend modes and artfully balance a basemap to be the balance of imagery and cartography that best suits your map! And have fun.

Happy Blending! John

 

Comparing imagery inputs and their blended intersection.

About the author

I have far too much fun looking for ways to understand and present data visually, hopefully driving product strategy and engaging users. I work in the ArcGIS Living Atlas team at Esri, pushing and pulling data in all sorts of absurd ways and then sharing the process. I also design user experiences for maps and apps. When I'm not doing those things, I'm chasing around toddlers and wrangling chickens, and generally getting into other ad-hoc adventures. Life is good. You might also like these Styles for ArcGIS Pro: esriurl.com/nelsonstyles

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