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← Revision 9 as of 2017-12-24 08:35:42 ⇥
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| 1. BeiDou / COMPASS from China’s | 1. [[https://en.wikipedia.org/wiki/BeiDou_Navigation_Satellite_System|BeiDou]] / COMPASS from China’s |
GPS
Networks Providing GPS GNSS
- NAVSTAR (US)
- GLONASS from Russia
BeiDou / COMPASS from China’s
Galileo from Europe (As of December 2017, 22 of the planned 30 active satellites are in orbit.)
The bottom line is that there is no question of
Phone GPS
GPS Accuracy https://www.gps.gov/systems/gps/performance/accuracy/
- Quote: "most of today's civilian devices use only one GPS frequency, while military receivers use two."
Google - Maps
To specify a location based on coordinates in Google Maps, use (Name) loc:-24.4356,27.731626
URL build: http://maps.google.com/maps?z=12&t=m&q=loc:38.9419+-78.3020
- z=zoom
t=type, ("m" map, "k" satellite, "h" hybrid, "p" terrain, "e" GoogleEarth)
- q=search query (prefixed by loc: then google assumes it is a lat lon separated by a +)
e.g. http://maps.google.com/maps?z=12&t=h&q=loc:-26.194707+28.279794&
- Google Picasa client can upload/backup photos to web, Google maps photo's with embedded GPS coords.
Rough script to covert .csv commadelimited file to google .mkv csvtokml-20100330.py
Tools
Converter decimal to min/sec and back.
- Google earth - Free Client
...