I've got a Lowrance LMS320 and I've been thinking about buying some of these Navonics charts for it. Unfortunately, I would need the lakes and coastline of Texas. That's 2 sets I think. $$
Anyway, my question is regarding the level of detail that these maps provide. Are they simply electronic versions of the kinds of maps that I see at the sporting goods stores, Hotspots etc. or do they actually provide a lot more detail than those paper maps have.? Underwater structures, hazards, etc?
I suppose I could take my map in hand and go to a Marine store and look at demo of Navonics for the same area. Has someone done that or made the comparison I'm asking about.
My feeling is that if all it is is a electronic version of what's on paper then maybe its not really worth it. I can usually correlate pretty well from the Mapcreate maps that I bought and other paper maps. Its a matter of information. If there is actually more information in the Navonics stuff then it may be worth it. I got a feeling that I'll always want paper anyway.
The digital charts are made from the paper charts. If anything, they are less accurate than the paper charts. Raster charts are just scanned paper charts so the accuracy is about the same in terms of information. Their registration can be off a little. . Vector charts are digitized paper charts and do contain errors and less detail. My CMAP-NT+ charts of the ICW has many references to markers like R3 and G4.
Doug
<nospam@wtez.net> wrote in message news:1110584625.626521.154940@z14g2000cwz.googlegroups.com...> I've got a Lowrance LMS320 and I've been thinking about buying some of> these Navonics charts for it. Unfortunately, I would need the lakes> and coastline of Texas. That's 2 sets I think. $$>
Anyway, my question is regarding the level of detail that these maps> provide. Are they simply electronic versions of the kinds of maps that> I see at the sporting goods stores, Hotspots etc. or do they actually> provide a lot more detail than those paper maps have.? Underwater> structures, hazards, etc?>
I suppose I could take my map in hand and go to a Marine store and look> at demo of Navonics for the same area. Has someone done that or made> the comparison I'm asking about.>
My feeling is that if all it is is a electronic version of what's on> paper then maybe its not really worth it. I can usually correlate> pretty well from the Mapcreate maps that I bought and other paper maps.> Its a matter of information. If there is actually more information in> the Navonics stuff then it may be worth it. I got a feeling that I'll> always want paper anyway.>
Bruce in Alaska 12 March 2005 21:49:17 [ permanent link ]
In article <tPmdnbwwpNEow6_fRVn-hQ@cablespeedmd.com>, "Doug Dotson" <dougdotson@NOSPAMcablespeedNOSPAMcom> wrote:
The digital charts are made from the paper charts.
Actually, all US charts, paper, or digital, are produced from a common NOAA Digital Database. This database is available for purchase, by anyone, for a price. (Very High) The database is always being updated, with new, and or revised data, but is archived at fixed intervals, for distribution to the Official NOAA Printers and Digital Chart Providers. Archival Dates are published with the charts, so that one knows just when the dataset was frozen for that publication.
Bruce in Alaska wrote:> In article <tPmdnbwwpNEow6_fRVn-hQ@cablespeedmd.com>,> "Doug Dotson" <dougdotson@NOSPAMcablespeedNOSPAMcom> wrote:>
The digital charts are made from the paper charts.>
Actually, all US charts, paper, or digital, are produced> from a common NOAA Digital Database. This database is> available for purchase, by anyone, for a price. (Very High)> The database is always being updated, with new, and or revised> data, but is archived at fixed intervals, for distribution> to the Official NOAA Printers and Digital Chart Providers.> Archival Dates are published with the charts, so that one knows just > when the dataset was frozen for that publication.>
Bruce in alaska
One of the reasons for asking is that in our area on Lake Buchanan a Navonics boat was out there plotting contours. That got me to thinking that maybe their maps might be unique with some other value add over the paper and other standard maps.
I'm familiar with all the scanning etc. I've done a bit of that myself using Fugawi to scan paper in and then calibrate and then download to my PDA with gps attachment. Unfortunately, I can't do it on my LMS320.
"don" <nospam@wtez.net> wrote in message news:39m6f4F60r8bbU1@individual.net...> Bruce in Alaska wrote:> > In article <tPmdnbwwpNEow6_fRVn-hQ@cablespeedmd.com>,> > "Doug Dotson" <dougdotson@NOSPAMcablespeedNOSPAMcom> wrote:> >
The digital charts are made from the paper charts.> >
Actually, all US charts, paper, or digital, are produced> > from a common NOAA Digital Database. This database is> > available for purchase, by anyone, for a price. (Very High)> > The database is always being updated, with new, and or revised> > data, but is archived at fixed intervals, for distribution> > to the Official NOAA Printers and Digital Chart Providers.> > Archival Dates are published with the charts, so that one knows just> > when the dataset was frozen for that publication.> >
Bruce in alaska> One of the reasons for asking is that in our area on Lake Buchanan a> Navonics boat was out there plotting contours. That got me to thinking> that maybe their maps might be unique with some other value add over the> paper and other standard maps.>
I'm familiar with all the scanning etc. I've done a bit of that myself> using Fugawi to scan paper in and then calibrate and then download to my> PDA with gps attachment. Unfortunately, I can't do it on my LMS320.>
don
Navionics has a map series for inland lakes for fishermen to use with fine bottom contour information way beyond what is available from the government. I have been told they started in the eastern USA and are slowly working their way west. yes, they are doing their own detailed survey. 73 Doug K7ABX
Where do you get the information you use in Navionics charts?
It varies by area, but most commonly from local hydrographic offices and official government charts, such as NOAA, NIMA, British Admiralty, USACE, DNR, NHS and USGS. We also use private sources such as Fishing Hot Spots, LakeMaster and Imray paper maps.
