geolocation

Obtain Latitude and Longitude from a GeoTIFF File

Using GDAL in Python, how do you get the latitude and longitude of a GeoTIFF file? GeoTIFF's do not appear to store any coordinate information. Instead, they store the XY Origin coordinates. However, the XY coordinates do not provide the latitude and longitude of the top left corner and bottom left corner. It appears I will need to d...

Google maps sometimes does not return a geocoded value for string

Hi Guys, I have the following code: It basically looks into a HTML list and geocodes and marks each item. it does it correctly 8 out of ten but sometimes I get an error I set for show in the console. I can't think of anything. Any thoughts is much appreciated. $(function () { var map = null; var geocoder = null; function initialize(...

How to implement geo-based data store and computation?

Well, let me explain this briefly: 1.I want to build a website that provides location based services, like http://fireeagle.yahoo.net/ . 2.I guess most of these services have something do with longitude and latitude. 3.Is there any particular database/datastore/data structures fit well for such apps? I mean easy to store longitude, la...

j2ME setLocationListener()

I'm programming a GPS tracking system using the Motorola i335 running on Sprint's IDEN network. I'm using the javax.microedition.location api to find the GPS coordinates. To set up the updating, you use the [setLocationListener][1] method. I originally tried passing (listener,2,1,1). However there were too many invalid locations bein...

Do something when phone reaches a set of location?

I have a list of coordinates in the database identified as POI. For a city could be >100 records. I would like to get notified when the phone gets in 150 meters range of one of the location. The location coordinates too has an error/radius, usually 10 to 100meters. Since I don't find it good to add each location(could be hundreds) for a...

Directional Map Search

Hello, I am trying so write a bit of code that will search for a given point on a map, but in a given arc of a compass bearing. e.g. 45 degress (north-east), 20 degrees either side. So far I have got a SQL command that will give me the results in a given radius, need some help on how to filter it to a direction. SELECT * FROM (SELECT ...

Android: how to get the walking distance between two geo coordinats?

I used this query URL http://maps.google.com/maps?q=from+A+to+B&output=kml ,which is given in the answer to this question. But after I tried it, it doesn't work with coordinates. It works with address names tho. I guess I could use google's geocoding to get the addresses first. But I wonder if there is another way to get the w...

How to store and search GeoData in AppEngine?

In my application, I want to store geographical data (longitude and latitude). Then I want to ask "which place is in this region". SQL-like query can't be used, since "Inequality Filters Are Allowed On One Property Only" in GQL link text Do you know about another solution how to store these data in AppEngine database and ask for them wi...

Real time location tracking - windows program or browser based?

I want to track a few hundred, maybe a few thousand people in real time. Let's say that the hardware aspects are sorted out and I can get the data into a database. Now, I want to get it out and show it, in real-time. Weeeell ... "real-enough" time. Let's say that I want to draw a floorplan of a building and plot everyone every 1 to 5 ...

Location based URL routing in Rails

Hi everyone, I am new to rails. I want to know more about IP based Location, GeoLocation URL routing. I have 2 questions. The first one.. Based on the location of the country, how to you have URL routing? If my IP is from USA, I should be directed towards USA homepage. If I am from UK, I should be directed from UK homepage. If I...

Does this basic Google Maps V3 location demo work for you?

http://code.google.com/intl/fi-FI/apis/maps/documentation/javascript/examples/map-geolocation.html I get a grey page with latest Google Chrome (access to location allowed for this website), but no error messages. Ideas? ...

how does google map determine locations for phones without gps

http://www.google.com/mobile/maps/ Using this on phones without gps, the locatiosn can be obtained as well. I am currently using the html5 geocoder/gear for obtaining locations. However this only works for iphone and android. BUt how does google map get the information from phones without this capbility? ...

Android: How to initialize a variable of type "Location" (other than making it equal to null)

Hi Guys, I'm looking to test some code I've written and to do so I need to construct a variable of type Location and to give it a long / lat value but I'm unsure how I would do so. Any ideas? ...

Android-Java: Constructing a triangle based on Coordinates on a map and your bearing

Thanks, EDIT/// Converting the outcome to radians gives me a lat of 5.6xxxxxxxxxxxxxx .I have a feeling this bug has something to do with conversions but its not THAT simple. The equation is correct, it just.. outputs wrong.. ...

How to efficiently track my geolocation during traveling using iPhone

I'm going to travel through Thailand and I want to keep track of my location to geotag photos afterwards taken with a digital camera (iPhone's camera is not good enough). There are two things that are important here: I don't want to update manually I want the battery to last as long as possible, since the times I will be able to charge...

Nerddinner inserting longitude and latitude to database MVC

i am facing a problem in the nerddinner, what i am facing: in the DinnerForm.ascx there is a javascript code $(document).ready(function () { NerdDinner.EnableMapMouseClickCallback(); $("#Dinner_Address").blur(function (evt) { //If it's time to look for an address, // clear out the Lat and Lon ...

Good value for declaring "Position reached" in geo coords

Hi Guys, I've written a kind of navigation system for pedestrians. The only thing is, that I need a criterion to finish the navigation. My values are gives as lat/long pairs. What would you assume would be a good value to say, both positions are equal/near enough to tell the user that he has reached the goal? Please keep also in mind,...

Getting Gowalla Check-in history using API

I have been playing around with the Gowalla API, and was wondering if anyone has found a way to get a list of all recent checkins (just your own, not including friends). The documentation is quite awful. ...

C# Using WIPMania in Application

Hey im trying to use the WIPMania Geolocation database in my C# application but i really don't know how to it... I'm looking for a way without having to include external libraries if possible... http://www.wipmania.com/en/base/ There are some different formats availible. ...

Geolocation under firefox 3.6 requires Proxy Authentication?

I am trying to share my location on geolocation enabled pages from firefox 3.6, but doesn't seem to get any kind of success or failures. When I wrote my custom js containing navigator.geolocation.getCurrentPosition(func1,func2), the success callback isn't called at all. When I tamper the http requests on firefox, the request to https...