latitude-longitude

问题 I have found many calculations here and some php examples and most are just over my head. I found this example: SELECT b.zip_code, b.state, (3956 * (2 * ASIN(SQRT( POWER(SIN(((a.lat-b.lat)*0.017453293)/2),2) + COS(a.lat*0.017453293) * COS(b.lat*0.017453293) * POWER(SIN(((a.lng-b.lng)*0.017453293)/2),2))))) AS distance FROM zips a, zips b WHERE a.zip_code = '90210' ## I would use the users submitted value GROUP BY distance having distance <= 5; ## I would use the users submitted value But, I

问题 Hi I'm using Jquery's mouse position to find the position of the page. I would like it to have it behave more like latitude and longitude coordinates. $().mousemove(function(e){ $('#detect').html( e.pageX + '° N, '+ e.pageY + '° E' ); }); I realise this is not true latitude and longitude coordinates. The box would be the webpage, and 0 is absolute middle of the webpage. Moving the mouse into the N/E area would produce this result. Any help would be appreciated. Thanks. 回答1: Javascript: var

问题 I'm receiving lat and long data from Google Maps and I want to send that along to Freebase to get a description of the relevant place. There's a geocode schema (http://www.freebase.com/location/geocode?schema=) but it seems like you have to to enter them separately? I'd like to, let's say using the lat / long of Berlin, get the following description from Freebase: http://www.freebase.com/m/0156q Would love any help, thank you. 回答1: If you convert your point to a small bounding box, you could

问题 My question is, What is the best way to set to many markers on google maps on android program? I have a sqlite database with longitude and latitude for every markers. For example add all markers 1km around the current location Get the range of longitude and latitude on moving map and display markers between that range How can i get the range of longitude and latitude? 回答1: Based on the comments from above you will need to do the following: 1) Use the Google Api maps reference for Android to

问题 Here I am using this code in order to get the latitude and longitude of the location but all that I am getting is latitude 0.0 and longitude 0.0 the code to find the latitude and logitude that I am using is given as below , Also I am testing this code in Genymotion emulator and all that is printed in the log is 0.0 0.0 because the if(address.size()>0) is not getting satisfyied can anyone tell where am I going wrong or is it because of emulator. Geocoder geo = new Geocoder(getActivity()); try

问题 How do it get postal code value for a location if i have Latitude and Longitude values of that location 回答1: I think you can use getPostalCode() for this. Geocoder geo = new Geocoder(getApplicationContext(), Locale.getDefault()); List<Address> add; try { add = geo.getFromLocation(taplat, taplon, 1); addstr = add.get(0).getPostalCode(); //u'll get postal code in addstr } 来源： https://stackoverflow.com/questions/6965162/google-maps-pincode-latitude-longitude

问题 If I get the cell id Will it work to get the exact location of the mobile devices through j2me programming? I got to know how to get cell id by this link: Can I fetch position of mobile device in j2me having no GPS service using information from cell tower But whether to get location accurate is still a question? 回答1: One Single cell is not enough to get you the accurate location. you need at least 3 different cell to get a location as accurate as GPS What the cell information can do for you

问题 i used this code which takes longitude and latitude of two different location and calculates the distance between them my code is protected void Button1_Click(object sender, EventArgs e) { double lat1= Convert.ToDouble(TextBox1.Text); double lon1= Convert.ToDouble(TextBox2.Text); double lat2= Convert.ToDouble(TextBox3.Text); double lon2= Convert.ToDouble(TextBox4.Text); var rlat1 = Math.PI * lat1/180; var rlat2 = Math.PI * lat2/180; var rlon1 = Math.PI * lon1/180; var rlon2 = Math.PI * lon2 /

问题 I have a requirement to loading a Google map location given the pin code or area code. I've tried using the Geocoder method to find the latitude and longitude using a given address. This works when a location or area is given, but is not working for the pincode (specifically India). Is there is any method or way to find the latitude and longitude of a given area using the pincode. This is specific to a map to be loaded on android, using the mapview. The code i've written is given as: package

问题 I apologize in advance for my beginner question, but R spatial analysis is completely new to me. I'm trying to convert an entire dataset (lat,long) into UTM for Ecuador (zone=17). My code below is only converting the first lat/long coordinates. Any advice would be greatly appreciated! require(proj4) require(rgdal) require(sp) require(proj4) ## Load dataset, total h7_x length = 327463 h7 <- read.csv('h7.csv', header=T) h7 <- data.frame(x=h7$h7_x, y=h7$h7_y) ## Convert Lat/Long to UTM