Brunton Multi-Navigator Especificaciones descargar pdf (Pagina 120)

from the FGD file if it is available

If the

FGD

file is available then additional information is obtained from it :

The Map Name

The Map Scale

The positions of the map corners (the border or neat line).

If the positions of the corner markers can be obtained then 3 of the corners are used as calibration

points. There have been the some instances where the corners of the map stored in the FGD file are

in error, this produces an incorrect calibration.

Maps from other sources may have a

.XML

.MET

file and these serve a similar purpose.

NOTE: If there is no DRG (or similar) file and the image is not Geotiff then the .TFW file is used.

This file contains very basic calibration information and is missing some necessary parameters, this

process is described fully below, see

Importing DRG's with only a .tfw File

If none of the above are available then the map image cannot be imported and must be calibrated

manually.

Geotiff

OziExplorer can extract the georeference information from Geotiff files but it only knows how to

decode the information if it is from a known source. Decoding is limited to just the commonly used

map projections and grids.

The ability to decode other sources of georeference information in Geotiff files will be added on an

as need basis where it is possible to do so.

(To import geotiff images, a geotiff support file (dll) is required. This can be downloaded from our

website.)

Importing a Single DRG Map

Select the

Import Map

Single DRG Map

Option on the File Menu.

Step 1

- Find the image file of the map you want to import.

You need to know the name of the image file of the map you want to import. (It must be one of the

supported image types such as TIF, BMP, PNG, JPG, SID, ECW, .....). You will have to find out this

name from the information supplied with the CD, I would assume.

Press the OK button and the software will allow you to navigate through your Disk Drives and

Directories until you locate the file. If the CD is from the USGS then the file would normally be

located in the DATA folder. When you have located the file, select it by double clicking on the name

or click on the name and press the Open button.

A METADATA (FGD or other) file may also be available for the image. This is usually located in

the METADATA directory of the CD. If you copy the image file to your hard drive the metadata

(FGD) file must also be copied and placed in the same directory as the image file.

Step 2

Specify the Name and Path of the OziExplorer Map file you want to create.

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