Patent ID: 8885980
Filing Date: 2014-11-11
Classification: G06F,G06T,G09B

Abstract:
1. A method for storing and retrieving tiled image data comprising: for each of a plurality of tiles at a pre-selected zoom level from the tiled image data, storing a tile record in a tiled image file, the tile record being associated with one of the plurality of tiles, the tile record being associated with a row and a column; creating a lookup table having a direct-lookup value for the tile record at the row and the column associated with the one of the plurality of tiles in the tiled image data; when there are none of the tile records at the row and the column of the lookup table, storing a null value in the lookup table at the row and the column; when there are none of the tile records in a lookup table row in the lookup table, omitting the lookup table row from the lookup table; creating a row index file having indices into the lookup table, and having a null value for each of the omitted lookup table rows; and retrieving an address for a specific tile by executing