agree with djfe that a rdbms may likely help. map information can be saved in the database and retrieved say via sql queries.
different pieces of gis information can be saved in diferent tables along with their composite primary keys. this would facilitate retrieval of specific information and as data is persistent in a database, it may be possible to do 'delta updates' by 'playing' the delta sub-sets e.g. data received in that day so that only the 'delta' gets computed and updated in the database. however this relies to a great extent on sophisticated and fast indexing / query capability of the particular rdbms system/product. the use of delta updates may to a large extent reduce the effort as compared to re-computing the full database / all the tiles. but if things get out of sync, messed up it may be necessary to re-compute all the tiles in the database all over from all the detailed info _______________________________________________ dev-geolocation mailing list dev-geolocation@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-geolocation
