Navigation GPS

[alexfish]

Hi All

as part of this thread I will be using maps

For SeaMaps
go to the openseamp the free nautical charst . go to downloads and select the area

click on the downloads select format : mbtiles . note the size IE ensure esp on rpi there is enough disk space
for the download conversion . if 1.5gb = 1.5 *3 , can recover space by deleting the mbtiles after conversion

for conversion use mb-util its a python script . and need to convert to png

example

cd Downloads
git clone https://github.com/mapbox/mbutil.git
cd to the mbutil

command

mb-util --image_format png /pathto/*.mbtiles seamaps
in my case

mb-util --image_format png /home/pi/Downloads/OSM-OpenCPN2-NorthSea-20201106-2207.mbtiles seamaps

in there will be there will be the png files + a json file . leave as is.

if not want seamaps , will be posting details of the bacon tile server for openstreetmap later

BR
Alex

[alexfish]

nearest api for what3words was based on python wrapper
https://github.com/what3words/w3w-python-wrapper
it bemoans at app key KeyError: "'W3W_API_KEY'", so puzzled

rest in popular = 'J'

BR
Alex

[alexfish]

What3Words , I can sum up with what2words

git fail on V3

and followed instructions HERE
on RPI I get
res = geocoder.convert_to_3wa(what3words.Coordinates(51.484463, -0.195405))
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "build/bdist.linux-armv7l/egg/what3words/what3words.py", line 82, in convert_to_3wa
 File "build/bdist.linux-armv7l/egg/what3words/what3words.py", line 280, in _request
 File "/usr/lib/python2.7/dist-packages/requests/api.py", line 75, in get
   return request('get', url, params=params, **kwargs)
 File "/usr/lib/python2.7/dist-packages/requests/api.py", line 60, in request
   return session.request(method=method, url=url, **kwargs)
 File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 533, in request
   resp = self.send(prep, **send_kwargs)
 File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 646, in send
   r = adapter.send(request, **kwargs)
 File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 516, in send
   raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8080): Max retries exceeded with url: /v3/convert-to-3wa?key=what3words-api-key&language=en&coordinates=51.484463%2C-0.195405&format=json (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0xb5d14910>: Failed to establish a new connection: [Errno 111] Connection refused',))
>>> geocoder = what3words.Geocoder("what3words-api-key", end_point='http://localhost:8080/v3')

[alexfish]

Hi Joe

Thanks for testing

+ thanks for the link. ADDED , looks like this could cost money, and has limits,
+ only a comment , when at sea and out of range of a connection ?

In Past I posted details of Embedded Python using BaCon, so possible a half way Compromise , I hope,
as Can see , will not have tested this bit as of yet.

I am Busy for 3/4 days , back late at night ...

in mean time wonder where and or what three.little.piggies is or means, can't imagine that
four.little.piggies will be adjacent to three.little.piggies

Thanks again
+
BR
Alex