[gdal-dev] Reading DNC nautical charts

[Stephen Woodbridge]

There are two version of Nautical charts from what I can see:

1. DNC from www.nga.mil that you pointed at in VPF format
2. NOAA ENC charts

Here is a link explaining the difference:
http://www.nauticalcharts.noaa.gov/mcd/learn_diffENC_DNC.html

The ENC charts are available in S57 format and maybe as shapefiles. I 
played with the ENC charts a while ago with some success.

I thought OGR supported reading VPF files for VMAP0 data using (OGDI 
Vectors (VPF, VMAP, DCW)). But I have no idea if it would work for DNC data.

You might be able to read these with openmap.bbn.com
http://openmap.bbn.com/doc/OpenMapDevGuide.pdf
see section 8.5

-Steve

On 11/22/2015 4:14 PM, Hans Rijsdijk wrote:
> Thanks for your response.
> One can get the DNC charts free off the US website (although they may
> not make all details available).
> For most of my charts I use OpenCPN, but this doesn't run the DNC charts.
> Any suggestions of other open source marine software?
>
> Cheers
>
> Hans
>
> On 22 Nov 2015, at 9:40 PM, Brent Wood <pcreso at yahoo.com
> <mailto:pcreso at yahoo.com>> wrote:
>
>> I think you'll find the Digital Nautical Chart format is not supported
>> by GDAL.
>>
>> However there are open source marine navigational software
>> applications that will read them, but apart from USA & New Zealand,
>> I'm not aware of any countries that provide their charts for free.
>>
>> Brent Wood
>>
>> ------------------------------------------------------------------------
>> *From:* Hans Rijsdijk <hrijsdijk at gmail.com <mailto:hrijsdijk at gmail.com>>
>> *To:* Nicolas Cadieux <nicolas.cadieux at archeotec.ca
>> <mailto:nicolas.cadieux at archeotec.ca>>
>> *Cc:* "gdal-dev at lists.osgeo.org <mailto:gdal-dev at lists.osgeo.org>"
>> <gdal-dev at lists.osgeo.org <mailto:gdal-dev at lists.osgeo.org>>
>> *Sent:* Sunday, November 22, 2015 10:06 PM
>> *Subject:* Re: [gdal-dev] Reading DNC nautical charts
>>
>> Hi,
>> Here is a link:
>> https://www.nga.mil/ProductsServices/NauticalHydrographicBathymetricProduct/Pages/DigitalNauticalChart.aspx
>> I have also attached 2 of the charts.
>> Hope this is useful.
>> Cheers
>> Hans
>>
>>
>>
>> *From: *Nicolas Cadieux
>> *Sent: *Sunday, 22 November 2015 4:49 PM
>> *To: *Hans Rijsdijk
>> *Cc: *gdal-dev at lists.osgeo.org <mailto:gdal-dev at lists.osgeo.org>
>> *Subject: *Re: [gdal-dev] Reading DNC nautical charts
>> Hi,
>> If you have a link to the charts, I could look at it and see the
>> format and see if they are georeferenced (if coordinates like
>> longitude and latitudes is included in the image file).  They should
>> be.  If so, I would recommend you use a GIS software like QGIS to
>> visualise the maps  and manipulate the map.  QGIS has plugins that
>> will permit you to plug in a GPS and to track the movement for navigation.
>> QGIS uses the GDAL library to open, save and manipulate maps images
>> (rasters)  and point, line and polygons (vector data) so you get all
>> the power of GDAL and a user friendly interface.
>> Nicolas Cadieux M.Sc.
>> Les Entreprises Archéotec inc.
>> 8548, rue Saint-Denis Montréal H2P 2H2
>> Téléphone: 514.381.5112  Fax: 514.381.4995
>> www.archeotec.ca <http://www.archeotec.ca>
>> On Nov 20, 2015 4:13 PM, Hans Rijsdijk <hrijsdijk at gmail.com
>> <mailto:hrijsdijk at gmail.com>> wrote:
>> >
>> > Can anyone advise if DNC nautical charts can be used on the gdal
>> software and, if so even better with a gps? In other words for navigation.
>> > I am not familiar with gdal software so a 'fatherly' response will
>> be greatly appreciated.
>> >
>> > Cheers
>> >
>> > Hans
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