Map updating from formats SXF, TXF, DIR, MAP, SIT

It is possible to make changes in the open vector map by updating or adding objects. Updated and added objects can be chosen from files SXF, TXF or DIR (the list of files SXF and TXF).

Updating the map can be done by one of three modes:

- To update area - to find a map (map sheet) that have the nomenclature, coincident with the nomenclature of file SXF (TXF, MAP, SIT), then to search numbers of objects coincident with numbers of objects in file SXF (TXF, MAP, SIT) and to replace them; if numbers of objects are not found, objects are added into a map sheet; if the nomenclature is not found, the request about addition of a map into area will be given; procedure is carried out anew for each file SXF (TXF, MAP, SIT) in DIR list;

- To find map and add - to find a map (map sheet) that have nomenclature coincident with the nomenclature of file SXF (TXF, MAP, SIT) then to add objects into a sheet of a map; procedure is carried out anew for each file SXF (TXF, MAP, SIT) in DIR list;

- To add in area - to add objects from all files SXF (TXF, MAP, SIT) onto the currently chosen map (to combine all maps from DIR or all sheets from MAP into one map).

At updating a map an automatic recalculation of objects coordinates from files SXF (TXF, MAP, SIT) into a projection and coordinates system of updated map in view of parameters of spheroids and datums is carried out.