PolarView on iPhone & iPad

April 13, 2012

PolarView MX is now available as a free download for iPhone 4/4S and iPad 2/New. At this point it is a viewer for NOAA vector and raster charts. It provides a fully quilted seamless chart view for your enjoyment.

Here is a link to PolarView MX in App Store

More to come in due time – watch this space for announcements.


Tiled Marine Charts For Your Web Project

February 17, 2012

Do you want to build a web-based project for marine use? Need high quality tiles for the web based mapping service? Polar Navy can do it all.

We can now generate raster or vector tiles for the web based marine mapping services.
Take a look at a sample of Polar Navy charts here: http://www.wunderground.com/beach-weather

We can use S57 or BSB charts from NOAA and other sources. Inquire within for availability, pricing and other details by posting here. Replies will be screened, if requested.


Downloading NOAA Charts from PolarView

November 26, 2010

NOAA is getting with the times and now you can find out about NOAA chart updates on Twitter here: http://twitter.com/nauticalcharts

PolarView users can download and update NOAA charts directly from the program. Just follow these step by step instructions:

1. Open “Download” dialog by selecting “File-> Chart Download” menu or using keyboard shortcut Ctrl + ‘D’ (Windows) or Cmd + ‘D’ (Mac).

2. Press “Select” button to select area on screen.

3. Click on the first point on a chart. A yellow selector box should appear. Move the mouse to resize selector. Click on a chart again to stop resizing selector box and finalize selection.

4. In “Download” dialog click “Find Charts”. A new window should open, as shown in the image below, presenting you with a choice of available ENC charts for selected area.

Chart in the list will have different color depending on current status, also shown in status column. Charts that are up to date will be shown in blue. Charts that are out of date and have newer version available, will be shown in red. Charts that have not been previously downloaded will be shown in black.

5. Select charts you would like to download or update. To select a block of charts, click on the first entry, scroll and Shift-click on the last chart entry. To select multiple individual charts use Ctrl + click (Windows) or Cmd + click (Mac).

To update existing charts, sort by “Status” column by clicking on column heading. Once sorted by status, you can select only those charts that are out of date or not installed.

6. Press “Download” button to download and install selected charts.

That’s all there is to it 🙂

Chart Update Window


Fun with ENC charts

August 29, 2010

Looks like NOAA may be using automated conversion software to create ENC charts from satellite images. It works great most of the time, but sometimes things don’t go as planned. In this chart (US5NY43) Mid Hudson Suspension Bridge seems to be charted based on a shade of the bridge rather than bridge itself, moving it somewhat North. Stated accuracy of 1:40000 scale chart is about 140′ so this one is probably just about within the limit.

Good navigators always remember that chart is not a substitute for a proper lookout.

P.S. A bit more on this – the following is my guess, correct me if I am wrong.

So, NOAA may be trying to do the right thing. Note that the satellite image is taken from position slightly due North of the bridge, rather than vertically. From that point of view bridge as tall as this one (134 ft) would be visually shifted South relative to anything at “sea”/water level. On the other hand, if the sun was at high noon and directly overhead, shade from the bridge would be precisely under it at exactly the sea level, and would provide a perfect outline of the bridge on a chart. I think this method works “most of the time”, in particular for images taken during summer months in Southerly latitudes.

Here we have a relatively high Northern latitude, and photo likely not taken at noon, so the sun is low in the southern sky. Because of that, the shade is located North of the bridge. The “real” bridge position should probably be charted in the middle between the shade and the bridge on the satellite photo.