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Symbol Library

Give your map context.

The NPMap Symbol Library is the National Park Service’s web map icon set. We integrate these icons into our other mapping tools, including Park Tiles, Places, and NPMap.js/NPMap Builder.

The latest version is 2.5.0. It was released on April 26, 2018.




Adapted for the web

We considered the following factors when adapting print map symbols for use on our web maps:

Every pixel counts

When optimizing artwork that varies in size from 30px square for our largest stand-alone symbol size to as small as 9px square for 12px placemarkers, every pixel counts. We create our artwork to be as "pixel-perfect" as possible. In other words, we respect the pixel grid to make sure our symbols do not appear "fuzzy" on standard-resolution displays.

All our symbols are developed as resolution-independent scalable vector graphics (SVGs). Small SVGs that are not aligned to the pixel grid and/or optimized for their pixel dimensions fall apart, as their details are smaller than the pixels available to render them on screen:

example symbol enlarged to show detailexample symbol enlarged in pixel preview to show break down of detail

Our modified sailing symbol provides an example of artwork that remains legible at the scale of pixels.

Screen capture of enlarged vector artwork:

optimized sailing symbols enlarged to show detail

Enlarged vector artwork in Pixel Preview mode:

optimized sailing symbols enlarged and viewed in pixel preview

Artwork at actual size:

optimized sailing symbols displayed at actual size

A frequently-revised resource

We welcome your feedback on current symbols and suggestions for additional symbols. As new symbols are designed, we will bundle them into new releases of the library. Visit the Github repository to:

Open source

Our commitment to developing quality map symbols is driven by our larger pursuit to set the standard in web cartography. All of our maps are built with carefully considered symbolization that represents our parks in a way other web maps simply do not or cannot. That said, like most of our other tools, Symbol Library is available under a liberal open source license so others can build on top of and learn from our work.