I am very supprised when using openstreetmap to detect my location via openstreetmap site.
I use my laptop without any GPS receiver here. But it can point my location exactly to mets.
Could somebody please tell me how it can do that ?
There are several ways, I don't exactly know how OSM does it but it may be using the browser api to get the location, the browser knows a lot about where you are since it can check you IP, you Wifi connection and things like that.
Google for example has a database of all wifi networks any cellphone has connected to with it's gps location, so they guess where you are without gps based on witch wifis you can see.
OpenStreetMap, like most geo-based website, use the browser geolocation API to determine your location.
It is done by this javascript file on the OSM website.
The fact the position reported by your browser is more accurate indoor than GPS-based geolocation is probably because your browser use near WiFi SSID to "triangulate" your position (see this wikipedia article).
Related
I am working with Google Tango to extract data from the tablet and use it at the same time in another device. I am trying to record the data and use it with another laptop via live streaming.
I've looked at various topics about it and I found the Paraview topic. However the App records the data, save as ZIP file and send it via bluetooth(which is fine for me). I do not want to save the file as ZIP format and send it to another device. I want to record and use the data via live streaming(bluetooth or Wi-Fi).
Is that possible? How can I do it?
Paraview shared the source code so I think I can change it make it work for me. However I am not really used to programming.
Thank you very much for your help. I really appreciate it.
You might want to use sockets: setting a socket server on your computer and connecting to it via your tablet. It is a way to transfer information via what is called, for example, a TCP protocol.
However, there might be a more efficient way to do what you want to achieve with USB debugging. I did not got able to make USB debugging work yet on the tablet and computer I worked with.
You could use TangoAnywhere, I developed it so you can broadcast Google Tango position and orientation data to any device.
https://play.google.com/store/apps/details?id=de.grauonline.tangoanywhere
You connect using a TCP client on your PC/Mac (simple TCP client written Python or something) to port 8080 of your Tango device and will get the position data in realtime.
I recommend the Tango ROS Streamer app which enables you to choose which data (position, point cloud, RGB image) to stream or not.
You will need ROS to retrieve the data. On Linux ROS is easy to install, otherwise use a docker image of ROS.
Caution: the theorical WiFi bandwidth does not enable to stream all the RGB frames at full resolution without dropping some.
is there a way to find out the location without using GPS on the Windows phone 7. It's okay if ts approximate, as i want to get the city (not the precise longitude and latitude).
Use of the location API within Windows Phone 7 is described in this collection of MSDN articles. Pay special attention to the section in Location Programming: Best Practices about the right level of accuracy. When setting the GeoCoordinateWatcher to default instead of high accuracy it is optimzed for power-usage. In practice this means it will only resort to GPS of there is nothing else available.
All use of the location API will require you to ask the user for permission to use their location. The only way to get around that (if you really want to) is by using one of the tricks described in other answers.
I think it is not allowed by their policy. You have to use their Location services and include a on/off switch as well as privacy policy.
If you'll try to work around that, it may not pass the certification.
If you can find out the IP address assigned by an ISP (such as the IP address of the wireless router you connect to or the phone itself if it is on 4G (?)), you can use a GeoIP look-up. demo: http://www.geoiptool.com/
I'm usually a great debugger when it comes to helping family members with their computer problems, I also would normally post this type of question here, but I'm hoping this community can help me get to the bottom of this.
A family member is having problems with certain websites not loading all of the resources, primarily images is what it appears. I have disabled her Symantec protection in case it was scanning or preventing stuff from loading and have also uninstalled and disabled startup applications she doesn't need.
One example of a file that is not loading on her system is:
http://static.ak.fbcdn.net/rsrc.php/v1/yp/r/kk8dc2UJYJ4.png
I'm assuming this loads for everyone else here.
Any thoughts would be much appreciated. Also she gets a similar issue in IE, Chrome, Firefox.
The first place I'd look is if there's a commercial ad-blocker installed, as I guess it can't be an add-in/extension as different browsers have their own settings.
And it may sound silly, but did you check the hosts file (system32/drivers/etc/hosts)? Is it possible static.ak.fbcdn.net is just being redirected? You might want to try opening the command prompt and just doing ping static.ak.fbcdn.net and confirming her computer's exact behavior.
In my case FB redirects me to a749.g.akamai.net (or 125.56.208.11) and everything works fine.
Minor edit: I'm a bit skeptical that's the cause, as FB serves other stuff from that domain (CSS, JS). Photos and profile pictures seem to come from a different domain. But I'd still be interested in whether the problem occurs when connecting to the resource or displaying it.
Thats probably because your DNS resolves the Akamai CDN server, used by facebook to fetch images, to an IP address that is not reachable from your network. You may want to get the IP address of facebook CDNs used by your computer at the time this happens and contact your network administrator to find the reason behind the IP blockage (may be because of firewall). Other than that, you can try changing your DNS in your system settings which might give you an IP address that works for your network.
PS: I ran into this issue a few weeks ago and have found my findings to be correct.
How could a (Windows) desktop application be created to monitor the amount of time spent on a particular website?
My first idea was to play with the Host file to intercept requests, log, and proxy. This feels a bit clunky; and I suspect my program would look like malware.
I feel like there is a smarter way? Any ideas?
There is a tool similar to what you are looking for called K-9 Web Protection. It is more used for parents to monitor what their kids are up to when hooked up to the internet. I have installed this for my niece's computer with good results and praises as it blocks, content filter, restrict internet times. This may be OTT for your needs but worth a shot as you can see what sites were visited.
The other, is to use a dedicated firewall monitoring solution such as IPCOP which is a Linux based distribution with a sole purpose in providing a proxy, stateful packet inspection (SPI) firewall, Intrusion Detection System (IDS).
Hope this helps,
Best regards,
Tom.
You could do this by monitoring active connections via netstat, or if you need more advanced data you can install The Windows Packet Capture Library and get any data about network use, and inside your desktop app, find network traffic that relates to 'spending time' on a website (which might just be GET requests for you, but I don't know), and record various statistics as required.
Route the traffic through a scriptable proxy and change the browser settings to point to that proxy.
Anyone know application like network location(mac) for linux,windows.If not i am thinking of developing one for windows or linux.Application knows the location of user home,office etc.. then configure proxy according to the location its a handy tool actually.Any idea how to start that?
The max I can tell you is the city using the IP address using IP to Geo service. Finding out the exact position like office,home,restroom,metro etc looks quite tough unless you have some GPS device fitted to your computer.
Google launched it's Latitude service, but it was restricted to mobile devices. I am still unable to find how it can be done without any human intervention.
After thinking randomly and crazily, all I can say it that you need to hand over the information beforehand to the application which it can use to distinguish between home office or any other place.
BTW many applications have "Auto Detect Proxy" feature built in them. What is exactly you want to do now in this case?