Brunton Multi-Navigator Especificaciones descargar pdf (Pagina 214)

see also

Hints and Tips

Special Keys and Stuff

Why can't I upload to a Garmin GPS at 115,000 BAUD, Mapsource does it.

115,000 baud can be used for uploading maps and for upgrading the ROM software in the GPS, but

to the best of my knowledge and experiments it does not work for upload/download of waypoints

etc, if someone can show me any software which can do it I will try to do it also.

It would be great if the map calibration points could be set using keyboard control with the

arrows, the mouse is too coarse for this.

Already there, the

arrow keys

scroll the whole map, but the

shift + arrow keys

will move the

calibration point marker (bulls eyes). The method is to select the cal point required and use the

mouse to place the cal marker close to the spot required, then use the shift + arrow keys to move it

into place. This is mentioned in the

Special Keys and Stuff

help section.

Why doesn't OziExplorer have zooms larger than 750%

OziExplorer is Raster software (that is it uses images for the map, even the blank map is just an

image). Zooming in on a raster image does not improve accuracy. The best a raster map can be

calibrated to is +or -

1 pixel, when you zoom in at say 500% (x5 times) each pixel in the map image

is increased 5 times, the accuracy of a position is now +or

- 5 screen pixels. There seems little point

in adding more zoom levels, as the calculations cause pixel rounding the liklehood of causing

positional errors (on the zoomed screen that is) increases as the zoom level increases.

I do agree the blank map zooming could be improved as an image need not be used for that but to do

that I have to rewrite quite a bit of the code and am saving that for a while.

Why can't there be unrestricted zoom levels.

The true mapping image formats such as TIFF (geotiff), BSB, NOS/GEO, maptech PCX and my

own formats OZF and OZF2 are paged from disk as required, so only a small portion of the image is

in memory at any time. When a zoom level is required, for example, at 50% zoom only every 2nd

scanline (row) of the image is read from disk, at 33% (actually 33.333%) only every 3rd scanline is

read, this speeds up image reading and therefore display times. This means only those zoom levels

which can be divided into 100 evenly can be done (quickly) (50,33.33,25,20, etc). This limits the

zoom levels available and the way zooming can be done. Hence there is no zooming by dragging the

mouse and you are not able to enter your own zoom levels into the combo box.

Other image formats could have other zoom levels but I have decided to just use the 1 method,

however I have added a 75% zoom level for other image formats.

How come a 75% zoom level is not available for TIF, BSB and OZF files.

See the explanation above.

When I load in some maps the higher level zooms (up to 750) are not available.

With large maps the large levels of zoom cause the size of the map to exceed the internal limitations

of windows, this is a by-

product of the method I used to implement the zoom. To avoid this problem

the levels of zoom which would cause the problem have been removed.

Are there other ways of Zooming instead of having to select the Zoom combo box all the time.

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OziExplorer Help Contents

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Brunton Multi-Navigator Especificaciones Pagina 214

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Brunton Multi-Navigator Especificaciones Pagina 214

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