Brunton Multi-Navigator Especificações descarregar pdf (Página 132)

In order to discover if the map files in a folder have changed, been added to, or a new folder created

OziExplorer stores a checksum in the index file. When you do a map search OziExplorer checks if

the folders have changed, if something has changed OziExplorer creates or updates the index file,

however

in order to improve performance OziExplorer will not do this check again until

60 seconds

have elapsed since the last check.

Certain operations are exempt from this rule

Any Index Map operation will always check the map indexes.

Saving a Map file in OziExplorer will force an index check the next time a map search is done.

Changing the OziExplorer configuration will force an index check the next time a map search

is done.

Clicking on the red

on the Map Find buttons on the toolbar will force an index check the

next time a map search is done.

Restarting OziExplorer will also force an index check the next time a map search is done.

There is an option on the Map menu to

index Map Files

, this will re

-index the map files so they

will be up to date for map searching functions. For normal operation it is not necessary to do this

operation as OziExplorer will automatically keep the map index files up to date.

2 .Searching the Index files

The actual map search just looks into the index files, this means the search is very fast because all

the original map files do not have to be searched..

General

In order to find a map OziExplorer compares the search position to see if it fits within the corner

markers of the map, if it does then that map is further processed to see if it meets other criteria (more

detailed and so on).

So for a map to work correctly in a map search the corner markers must meet certain conditions.

The corner markers must be present

in some cases imported maps do not get corner markers

until they are saved in OziExplorer for the first time

OziExplorer warns of this when the map

file is first loaded.

The corner markers must be set in the correct position for the map. I know this seems obvious

but there are many maps available which are created outside of OziExplorer which do not have

correct corner markers.

The corner markers of the maps must not cross the 180 degree longitude

The corner markers must be within the mathematical limitations of the map projection being

used. World maps or continental type maps are usually the ones which do not always meet

these conditions.

Tips

If you make changes to the map files stored in a folder OziExplorer may not pick this change up

until 60 seconds have elapsed since the last search. You can force OziExplorer to scan for changes

by clicking on the red

on the Map Find buttons on the toolbar (you need to click it twice so it

returns to its original position). Restarting OziExplorer will also scan for changes.

Be careful if you specify a root folder as a path ( say C:\ ) as OziExplorer will scan the entire hard

disk for map files, this could take considerable time.

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