Using Maps in PowerPoint

by Geetesh Bajaj, November 17th 2004

Introduction
The Need for Maps
Map Formats
Preparing Maps
Inserting and Animating Maps
Conclusion

Introduction

Maps make excellent visuals and can add so much relevance to presentations that speak about anything to do with geography. You may want to:

1. Show the location of company offices, franchisees or service centers.
   
   
2. Show worldwide corporate presence.
   
   
3. Explain company growth prospects in neighboring and far geographies.
   
   
4. Show air or sea routes between places or show trade routes.
   
   
5. Explain basic geography in a presentation.
   
   
6. Explain a historical event with its relation to past and present day geography.
   
   
7. Show political happenings.
   
   
8. Show demographics.
   
   
9. Show worldwide growth potential.
   
   
10. Explain your next vacation!

In the rest of this article, we'll explore possibilities and implications of using maps in PowerPoint. It's important that you understand that we are discussing professional, cartographic maps here and not the other map type: route and location maps.

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The Need for Maps

The biggest problem with using maps in a presentation comes from the fact that designers don't use good quality maps. More often than not, such maps are sourced from within PowerPoint's own clip art collection. That's changed since new versions of PowerPoint no longer include the maps! Nor are such maps to be found as of today on Office Online.

As a presentation designer, I'm always looking for high quality maps that look different from the conventional or the ordinary. Yes, I know such maps are often very expensive but if you purchase one high resolution world map and another high resolution map of your country, that's going to be a long term investment worth the cost.

I ended up sourcing maps from Matton, a worldwide provider of high quality clip media. My contact at Matton was Chris Ferrone, Managing Partner. Thank you, Chris.

You'll find links to more map resources here...

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Map Formats

Choosing a map format is probably the most important decision you'll have to take — it's important that you take the right decision since maps don't come cheap. Normally, you'll have to choose between two format styles — vector and bitmap.

A vector format map normally comes in several styles including political and geographical. Political maps show all countries color coded and geographical maps include bump maps based on the land and sea elevations. Most of the time, these maps include layer wise distribution of content — thus you'll find several layers of captions and legends — and then some layers of elevation. You'll also find separate layers for country boundaries. These vector maps need to be in a layer compatible formats that are also print friendly — most of the time this means that the maps are available in EPS (Encapsulated Postscript) or AI (Adobe Illustrator) format.

Unfortunately, PowerPoint cannot import both these formats natively — but that's probably a blessing in disguise because you really do not want to import such high resolution maps in PowerPoint anyway — that's a sure fire way to bloat up your presentation size and make it unmanageable!

Maps are also available in bitmap format — they are almost the same as the vector maps apart from the fact that they come in a bitmap format like PSD (Photoshop) that supports layers. If you have to choose between vector and bitmap maps, do choose the vector option since those maps can always be saved to a bitmap format. Going the other way from bitmap to vector is seldom that easy or even possible.

In the screenshot above, you can see how a typical professional map looks inside a layer compatible application like Adobe Illustrator - there are separate layers for most geographical entities like captions, roads, lakes, elevation, etc.
Map Courtesy: Matton Royalty Free Vector & Bump Maps

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Preparing Maps

I already mentioned that you should not insert such high resolution maps in PowerPoint. There are two reasons for that:

1. Your presentation file sizes will balloon up.
2. Most map providers do not allow you to redistribute any map content in a screen resolution higher than 72 dpi since they want to protect their intellectual property — this rule normally applies to use in presentations and websites.

You can open the vector format map files in applications such as:

Adobe Illustrator,
CorelDRAW,
Macromedia Freehand,
Microsoft Expression
and most other drawing or illustration software.

Some of these applications also allow you to choose which layers you want visible. Thereafter export it to a low resolution (72 dpi) bitmap format like PNG. If your intended use is within PowerPoint, PNG is the best format to use because PowerPoint internally converts all bitmap formats except JPEG to the PNG format while saving it as part of a presentation.

Also, newer versions of Adobe Illustrator (Illustrator CS) and CorelDRAW (CorelDRAW 12) have a Save For Microsoft Office option within the File menu - this option typically uses PNG as the export format

.

In the screenshot above, you can see how you can export to a PowerPoint friendly graphic format like PNG with just one menu option in Adobe Illustrator CS using the new 'Save for Microsoft Office' command.

If you need to insert a vector map inside PowerPoint, save the map file to either the WMF or EMF formats from any of the applications listed above.

If you have sourced a bitmap format map file like PSD, repeat the same procedure and export to a low resolution bitmap format. You'll be able to open PSD files in applications like:

Adobe Photoshop
Corel Paint Shop Pro

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Inserting and Animating Maps

Inserting a map in PowerPoint is as simple as inserting any other graphic.

Choose Insert | Picture | From File… and navigate to wherever you have saved your file.

Within PowerPoint, you can do so much to make your map more interesting:

1. Add a zoom animation to focus on a particular area of the map. Glen Millar, a PowerPoint MVP and friend adds that "this is an extremely useful feature, but be aware that zooming in 50% at a given resolution will degrade quality by 50%. A workaround is to use a higher resolution image (zoomed resolution) and then animate a zoom out to 50%, make the map appear, then zoom in by 50% to its proper resolution."
   
   
2. Add a static or animated arrows to highlight an area within the map.
   
   
3. Highlight using the pen over the map using a Tablet PC or otherwise while projecting the map.
   
   
4. Combine a map and a chart within a slide.
   
   
5. Add captions relevant to the subject of the presentation.
   
   
6. Motion Path animations (in PowerPoint 2002/03) are helpful in showing movement along a particular direction - this works great with maps.
   
   
7. Distribute an area of the map into states or countries and color code them as required to explain a point.

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Conclusion

Maps can play a very significant role within a presentation since they represent a category of graphics known as intelligent visuals. Like diagrams and charts, maps show facts. Unlike diagrams and charts, maps can rarely be manipulated - thus your audience will certainly be more prone to trust the content presented through maps.

Presentations can be made more interesting by using maps. This assumes added significance nowadays because audiences are easily bored with seeing the same presentation styles and always want to see something presented in a different way.

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