开云体育

hi.? i know you can attach a gps device or manually input gps on Yaac.? Is there a way Yaac to retrieve the GPS data via the internet? Similar to when a website asks for location etc?? I probably missed something.

Sincerely,

delivers1234

Alas, there is no such function in YAAC to figure station position based on Internet connectivity, and, although there is a database to map numeric IP addresses to geographical locations (known as GeoIP), it would be really hard to do accurately, precisely, and reliably for several reasons:

1. Not all IP addresses are in the GeoIP database, especially those blocks assigned to mobile telephone carriers (for obvious reasons).

2. Because of NAT (network address translation) firewalls and the like, it is difficult for a network node behind such firewalls to know its own public IP address (i.e., the address of the public side of the firewall). A webserver can know the public address of a browser (the public address of the firewall), because that's what it sees in its view of the TCP connection as brokered by the browser's firewall, but the browser doesn't necessarily know its firewall's public address.

3. For several carriers, the public IP addresses are grouped at the geographical location of the carrier router feeding those "last mile" connections. For example, the location of my webserver is reported as two villages down the road from the server's actual location.

4. VPN (virtual private network) connections, like NAT firewalls, mask the actual IP address of the computer with the address of the far end of the VPN, so could be reported as entirely on the wrong side of the planet.

Reason #2 is the main reason why I'm not going to even try to add such a feature to YAAC, and reasons #3 and #4 make such a determination (even if possible) horribly inaccurate without even a means of determining the level of inaccuracy (so as to auto-configure the position ambiguity in the YAAC position report).

Now, if you're just trying to access a GPS on another computer on your local LAN (such as a Field Day setup), the GPSD daemon can help with that. Its whole purpose is to share a single GPS receiver's position data with multiple applications on the same computer, since they could not all read the data directly from the GPS serial port (they would each only receive garbled fragments of the GPS data). However, with suitable security controls, GPSD can also allow selected other computers to obtain the GPS position data of the local computer; normally this is disabled entirely for privacy reasons.

Hope this explains why I can't do this for you.

Andrew, KA2DDO
author of YAAC
________________________________________
From: [email protected] <[email protected]> on behalf of e m <delivers1234@...>
Sent: Tuesday, May 19, 2020 9:17 AM
To: [email protected]
Subject: [yaac-users] GPS help

hi. i know you can attach a gps device or manually input gps on Yaac. Is there a way Yaac to retrieve the GPS data via the internet? Similar to when a website asks for location etc? I probably missed something.

Sincerely,

delivers1234