1. MapSend structure
MapSend maps consist of the following 5 types of objects:
1. Polylines (lines)
In this document there is no difference in the meaning of polyline or line; polygon or area. These two definitions are identical.
POIs and Topo (if exist) are composed in a single databases covering all area of the given MapSend application (i.e. US, Europe, Australia etc); Polylines, Polygons and Points are used in several “maps” (i.e. States, Counties or Countries) which are parts of the whole MapSend. These 3 typs of objects (lines, polygons, polylines) can be added to MapSend with AddMagMap program.
Typically detail map (which is exported to the receiver) consists of polylines and polygons (point data are rarely used in detail maps, all detail map data of point type are presented as POIs).
Detail maps consist of LAYERS; the layers belong to one of the GROUPS. Number and type of the layers and groups depend on the MapSend type (i.e. Topo, DirectRoute, Streets&Destination).
Each layer has its own zoom properties and drawing type.
All small maps that compose the map has the same number (and type) of layers and groups. Drawing types and zoom properties of layers are different for the PC (computer) and the receiver, but number of layers and their type stay the same.
MapSend software has a database of predefined drawing types, each layer on PC map may contain several different drawing types, when map is exported to the receiver all objects that belong to the same layer on PC will be replaced by a single drawing type of the receiver's layer.
Example (US Topo 3d).
(1) For Explorist 500, for other receivers and firmware can be different.
In the above example Labels from freeways, highways, major_road, streets, trails, alternate_rds will be in the ROADS search group.
MapSend structure is shown schematically in the following figure:
Subdivision to smaller maps of the whole MapSend map make sense only for search on PC, when exported to the receiver all objects are parts of a single detail map. While exporting, data from all smaller maps in the selected region will be computed.
In the following example objects from Map1, Map2, Map3 and Map4 within selected region will be used to build one detail map.