compressing spatial data to enable fast incremental downloads of spatial data over a network the method comprises multiple steps for segmenting and reducing spatial data and introduces a location relevant naming system for storing and accessing the data applications installed on remote devices are able to efficiently compute data file names based solely on location information download the data over a network and cache the data on the device application_number US 85651210 A description detailed descriptions of the preferred embodiment are provided herein it is to be understood however that the present invention may be embodied in vanous forms therefore specific details disclosed herein are not to be interpreted as limiting but rather as a basis for the claims and as a representative basis for teaching one skilled in the art to employ the present invention in virtually any appropriately detailed system structure or manner fig1 shows the steps involved in organizing and compressing a spatial database 10 a spatial database comprises topographic information in the form of polygons lines and points expressed in a geodetic coordinate system longitude and latitude and a set of attributes related to the topographic data entities it is well known in the art that functions using spatial data such as routing or map display only require a subset of the entire data set for instance routing does.