MapInfo Spatial Server Map Tiling Service - Product Documentation ...

Defining Named Tiles
16
Parameter
Type
Required
The following is an example named tile definition:
Description
ted tile with 0 meaning no padding, 1 meaning
padding of 1 tile around the requested tile and so
on. If a PadFactor preference is not specified, the
global preference in the configuration will be used.
If neither is specified, the default is 1.0.
World
Map Of The World
/NamedMaps/WorldMap
epsg:3857
1
20
256
-20037508.34,-20037508.34,20037508.34,20037508.34
image/png
image/jpeg
image/gif
2019-12-31
96
Speed
false
1.0
What Is Level?
The level, in combination with the tile width, tile height, and bounds of the named map, determines the
zoom level of the tiles to be returned. The level shows how close the map image is to the Earth. Level
1 is the furthest away and is composed of one tile that the entire map will be drawn into. Level 2 is
composed of 4 tiles, 2 across and 2 down. Each tile is a quarter of the entire map. Level 3 is composed
of 16 tiles, 4 across and 4 down, and so on. The higher the level specified, the closer to the Earth the
map image appears. For example, levels 1 to 3 usually show global or hemispheric detail, levels 4 to 15
show county/state/province level of detail and some larger cities, levels greater that 15 show street level
views.
What the levels actually display is dependant on the named map hosted by the Map Tile Service. For
example, a level of 1 for a world map would be zoomed out to show the entire world. However, if you
have a named map of only a city (for example, New York, Toronto, or London), a level of 1 would be
zoomed out to show a street level map.
How Tile Height Is Calculated
The tile height is calculated from the map bounds and the tile width to produce a tile that has the same
aspect ratio as the bounds.
The tile height is calculated using the following equation:
tileHeight = (boundsHeight ÷ boundsWidth) × tileWidth
MapInfo Spatial Server 1.0