I need an algorithm that will convert a GPS coordinate to a screen location on a displayed google map. I would think this would be simple- get the coordinates for the four corners of the displayed map, find the differential and create a scaling factor for a pixel location on the screen. Is this correct or am I missing something. I'm k...
Say you have a Windows Mobile 6.0 phone that also has a GPS receiver. Does the WinMobile SDK support accessing GPS functionality? If not, what are the options (API) for programming with the GPS i.e write apps that will use the GPS capability. I am mainly interested in Windows Mobile 6.x but please do include generic replies also. I wi...
Hello - I'm looking for some feedback, blog links, etc that offer some tips and tricks for iPhone GPS development. I've read and understand the API, I have my demo app up and running, etc but I have run into some "quirks" with gps on iphone. For example, it seems that you you will receive a lot less location updates when your iphone ent...
I'm sure this is publicly available somewhere but my google-fu has failed me. What I'd like to do is download the most accurate lat/long/alt data available for the world. This can exclude oceanic regions. Also, I do not need addresses. Mostly, what I need is: given a lat/long what is the alt? Google Maps does not currently have altitude ...
I'm parsing NMEA GPS data from a device which sends timestamps without milliseconds. As far as I heard, these devices will use a specific trigger point on when they send the sentence with the .000 timestamp - afaik the $ in the GGA sentence. So I'm parsing the GGA sentence, and take the timestamp when the $ is received (I compensate for...
Hey guys, I'm researching something for a friend of mine who's involved in road construction. He needs some sort of a device that he can use to measure distance or area between points. I have done some GPS programming in the past but for mobile devices and i wasn't too impressed with accuracy. That was quite a few years ago and i think t...
I have a GPX file with a GPS track. Now I want to calculate the distance I covered with this track. What's the best way to calculate this? ...
Say you have n GPS coordinates how could you work out the central gps point between them? ...
I do a lot of location aware computing, often incorporating GPS. I have my own little simple NMEA parser that doesn't do anything special - just transforms the GPS specific sentences into usable numbers, flags, and so forth. However, there is a lot of active development done on projects such as GPSD and Gypsy. If GPS were a simple mat...
A mobile device like a Windows Mobile cellphone/PDA is by definition used from many kinds of locations, and should adapt accordingly. If I'm at home, I'd like it to switch to my local WLAN rather than using 3G or GPRS. If I'm in a meeting, I'd like it to be on silent buzzer rather than a loud ringtone. If I'm in a noisy environment, I'd ...
I'm an iPhone/iPod-touch newbie, and would like to write an iPhone application utilizing the built-in ANT wireless radio. As I found out both the iPhone and iPod Touch have an ANT wireless module, that is used in the Nike+iPod Sport Kit to connect the Nike sensor with the iPhone/iPod. After some googleing, I didn't find much (one articl...
I have several vehicles that send a data to server each minute. The server should be listening and decode the data to store in the database. There will be thousands of entries per minute. What is the best approach to solve that problem? ...
I'm thinking of writing simple application for Windows Mobile devices, where user could simply enter destination coordinates, and the app would calculate distance and show direction to the destination. But I haven't found any Free, preferably Open Source library with simple API to work with GPS. ...
Hi to all, I'm in the middle of writing a project that is web driven, and part of the application will be a data logging exercise carried out by our team of guards. What I need to know is : Is there any way to write the WAP page to poll the phone's GPS system for a location, and pass that up in to one of the database fields? I don't mind...
The location API only seems to work for me when I warm up the GPS by opening Nokia Maps or Google Maps. The Google Maps app has a status balloon which shows the number of satellites and lets the user know when the connection is active, however I have not found anything in the J2ME Location API docs which specifies how to do this. It ...
Ok here it goes, hope this is an original idea. Scenario is this. I have hosted a personal website, which contains a wordpress blog as well. I have a windows mobile connected to internet via GPRS. I want to write an application for my windows mobile, which would track my current GPS coordinates (I don't have GPS but have figured out a w...
I am making a web site targeted at mobile phones and would like to get the user's current GPS latitude/longitude when they visit my default page so I can show them results in their area. Is this possible using ASP.NET? See Also Get position data from mobile browser ...
I've got my current location lat long and I've got a list of places and there lat long. What I'd like to do is figure out if I'm nearby one of the places, nearby would be something like +100m. I don't want to display a map, just know if I'm near it. What kind of php libraries are available for comparing location/lat long? Or can I solv...
I'm writing an iPhone App that relies on getting the device location. Management have tasked me with producing data on how well the GPS performs in cities (tall buildings) and within buildings. Do any developers have data on reliability of GPS and the fall back to cell/wifi tower triangulation? Management-friendly info would be best bu...
Hello, After some searching on Google, I ask myself: Is it possible to build a compass (simple showing the heading/direction) with the iPhone 3G's GPS sensor? I have the suspicion, that this is only possible, if the device is moving. Any ideas are appreciated. ...