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> I may also rig a temperature sensor to the boat hull, or via a tether. |
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If you want this to scale to potentially commercial end users, I would |
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consider an NMEA based off the shelf sensor? Although the prices are |
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quickly > £100, ie non trivial, NMEA 0183 sensors are plentiful and |
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NMEA2K is getting rapidly available (add an Actisys bridge to get data |
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into the computer) |
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> What concerns me about openstreetmap, is I had envisioned a system where |
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> the database is downloaded to the operator's embedded system depending |
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> on the anticipated area of local/regional travel, thus not having to |
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> depend on constant/reliable internet access. |
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Can you not download openstreetmap? |
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Your bigger issue is that it's not really a nautical mapping system? |
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In the USA you can have all the raster nautical and aviation maps for |
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free (cool). The argument goes that the tax payer already paid for |
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them, so the data is made completely freely available |
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> My reason for using this list, is to flush out any gentoo-ish |
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> common ground or any hardware suggestions; not an expose |
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> on openstreetmap.... |
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I think you should consider some other options also: |
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- Small embedded server which collects the information, with a handheld |
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system then connecting via http or similar. I like the PC Engines Alix |
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boards. |
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- OpenCPN customised for your needs |
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The top one is similar to something I'm working on. We |
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(http://www.mailasail.com) are building a small embedded router for |
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connecting all the communications bits on a boat together and we can |
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easily take in NMEA and repeat it via GPSD. I plan to either write, or |
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pay someone to write, a fancy javascript based instrument console |
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something along the lines of the ipad "NMEARemote" app. The goal would |
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be to use all the responsive magic that's easy to get these days to make |
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it scale from a phone to tablet screen. |
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I think with a decent browser on your tablet you can fairly easily build |
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decent web apps these days, especially if you don't need to target IE. |
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To my eye this dramatically simplifies the problem because you can use |
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off the shelf components and focus on the software |
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As an aside if anyone here is interested in extra work I have a fairly |
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big backlog of web based work. Probably need backbone+jquery skills |
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with a Rails/Mojolicious backend to talk to |
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Good luck |
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Ed W |
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