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Update index.md

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nvkelso committed Feb 14, 2017
1 parent 00549d5 commit 7d19fe43ad25dee49ae887b43994529bc7b3d26b
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@@ -4,7 +4,7 @@ The Mapzen terrain tiles provide basemap elevation coverage of the world in a ra

Our raster tiles are square-shaped grids of geographic data that contain elevation data in a raw or processed format.

Tiles are available for zooms 0 through 15 and are available in several spatial data formats including processed PNG images, which are optimized for mobile and web display, and raw elevation GeoTIFFs for desktop analytical use. Data is available in both projected Web Mercator (EPSG:3857) and non-projected geographic coordinate system [WGS84](http://spatialreference.org/ref/epsg/wgs-84/) (EPSG:4326) formats.
Tiles are available for zooms 0 through 15 and are available in several spatial data formats including processed PNG images, which are optimized for mobile and web display, and raw elevation GeoTIFFs for desktop analytical use. Data is available in both projected Web Mercator (EPSG:3857) and non-projected geographic coordinate system [WGS84](https://en.wikipedia.org/wiki/World_Geodetic_System) ([EPSG:4326](http://spatialreference.org/ref/epsg/wgs-84/)) formats.

If you are familiar with [digital elevation models](https://en.wikipedia.org/wiki/Digital_elevation_model) (DEMs) or [digital terrain models](http://tx.technion.ac.il/~dalyot/docs/Intro-DTM.pdf) (DTMs), this service is for you!

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