wgs84

Hi I am having a little trouble figuring out how to convert between types of coordinates. I have a list of coordinate sets with the following description "Coordinates are always in the WGS84 system. All coordinates a represented as integer values x and y where the coordinate value is multiplied with 1,000,000." An example: 559262 6319512 Well, I need to convert these to long/lat (and back) so i can use these in google maps (android). But this is not as easy as it seams. I have been searching around and did find some code to do this, but it does not seam to work properly. Anyone who can provide

I searched but I could not find a complete answer. In C# if at all possible. I need the shortest distance between a WGS point and a WGS point defined line segment on a sphere (Earth exactly). float DistanceInKilometres(PointF LineStartA, PointF LineEndB, PointF ThePoint) EDIT: Perhaps an illustration would help Please note that this is an ideal example. 'The point' could be anywhere on the surface of the sphere, the segment start-end, too. Obviously, I'm not looking for the distance through the sphere. Math isn't my stronger side, so I don't understand normalize or to cartesian . Maybe I

For an application I'm writing we are interfacing IOS devices with an external sensor which outputs GPS data over a local wifi network. This data comes across in a "raw" format with respect to altitude. In general all GPS altitude needs to have a correction factor applied related to the WGS84 geoid height based on the current location. For example, in the following Geo Control Point ( http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HV9830 ) which resides at Lat 38 56 36.77159 and a Lon 077 01 08.34929 HV9830* NAD 83(2011) POSITION- 38 56 36.77159(N) 077 01 08.34929(W) ADJUSTED HV9830* NAD

单个在线转换： 地址：http://www.gpsspg.com/maps.htm 参数说明： 以下是批量转换： package com.demo.util; import java.util.Map; import jodd.http.HttpRequest; import jodd.http.HttpResponse; public class JoddHttpUtils { public static String postForm_1(String URL) { String json=""; try { HttpResponse response = HttpRequest .get(URL) .send(); if (response!=null) { json= response.bodyText(); } } catch (Exception e) { e.printStackTrace(); } return json; } } serviceimpl层中的这句代码中的oid与key参考下图 http://api.gpsspg.com/convert/coord/?oid=****&key=*****************&from=2&to=0&latlng= oid和key需要注册GPSspg账号才有，from=2&to=0参考以下说明： API地址

一、简介 　　主流被使用的地理坐标系并不统一，常用的有WGS84、GCJ02（火星坐标系）、BD09（百度坐标系）以及百度地图中保存矢量信息的web墨卡托，本文利用Python编写相关类以实现4种坐标系统之间的互相转换。 二、代码及说明 import math class LngLatTransfer(): def __init__(self): self.x_pi = 3.14159265358979324 * 3000.0 / 180.0 self.pi = math.pi # π self.a = 6378245.0 # 长半轴 self.es = 0.00669342162296594323 # 偏心率平方 pass def GCJ02_to_BD09(self, gcj_lng, gcj_lat): """ 实现GCJ02向BD09坐标系的转换 :param lng: GCJ02坐标系下的经度 :param lat: GCJ02坐标系下的纬度 :return: 转换后的BD09下经纬度 """ z = math.sqrt(gcj_lng * gcj_lng + gcj_lat * gcj_lat) + 0.00002 * math.sin(gcj_lat * self.x_pi) theta = math.atan2(gcj_lat, gcj_lng) + 0

I need to convert GPS coordinates from WGS84 to decimal using Lua. I am sure it's been done before, so I am looking for a hint to a code snippet. corrected question: Code to convert DMS (Degress Minutes Seconds) to DEG ((decimal) Degrees) in Lua? examples: Vienna: dms: 48°12'30" N 16°22'28" E or Zurich: dms: 47°21'7" N 8°30'37" E The difficulty I find is to get the numbers out of these strings. Especially how to handle the signs for degree (°) minutes (') and seconds ("). So that I would have for example a table coord{} per coordinate to deal with. coord {1} [48] coord {2} [12] coord {3} [30]

HI I tried to implement a simple GPS tracker. Therefore is used lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0, this); Then i used the public void onLocationChanged(Location location) { method to read the altitude of my current location. But i dont really know what Location.getAltitude() returns. The document says it returns the altitude. But is this in meters? or feets? if i put the phone on the desk next to me, this value changes between 500 and -500?? How does this really work??? The altitude value you get