Tile zoom levels and sizes

In most HERE map products, tiles run from Level 0 (the whole world) to Level 16, which shows the smallest surface streets. Many HERE products partition tiles to Level 14 by default, which are roughly 2.45 km wide at the equator.

Most source map data typically takes vector form, so you can zoom in and out of maps dynamically without losing resolution. At a given zoom level, the rendering process tesselates this vector data into raster tile images that you see on a screen. The standard width in tile pixels (not screen pixels) of a standard tile image is 256-pixels.

The following table shows the relationships between the zoom level of a tile at the equator and:

• The number of tiles needed to show the entire surface of the earth
• The width of a tile, typically in degrees longitude
• The meters per pixel in a tile image. At latitudes other than the equator, you can calculate meters-per-pixel by multiplying the value at the equator by the cosine of the latitude. The following table shows the widths of tiles at the equator, from level 0 to level 14: