// use standard equations to map into mercator projection var x = (180.0 + parseFloat(long)) / 360.0; var y = -parseFloat(lat) * PI / 180; // convert to radians y = 0.5 * Math.log((1+Math.sin(y)) / (1 - Math.sin(y))); y *= 1.0/(2 * PI); // scale factor from r...
packagegeohashimport("bytes")const(BASE32="0123456789bcdefghjkmnpqrstuvwxyz"MAX_LATITUDEfloat64=90MIN_LATITUDEfloat64=-90MAX_LONGITUDEfloat64=180MIN_LONGITUDEfloat64=-180)var(bits=[]int{16,8,4,2,1}base32=[]byte(BASE32))type Box struct{MinLat,MaxLat float64// 纬度MinLng,MaxLng float64...
问使用Google地名获取郊区的邮政编码EN由于墨尔本是一个城市，它跨越许多邮政编码。类似地，里士满是一个跨...
计算代码如下: function GetQuadtreeAddress(long, lat) { var PI = 3.1415926535897; var digits = 18; // how many digits precision // now convert to normalized square coordinates // use standard equations to map into mercator projection var x = (180.0 + parseFloat(long)) / 360.0; var y = ...
returnthis.MaxLat -this.MinLat } // 输入值:纬度,经度,精度(geohash的长度) // 返回geohash, 以及该点所在的区域 func Encode(latitude, longitude float64, precision int) (string, *Box) { vargeohash bytes.Buffer varminLat, maxLat float64 = MIN_LATITUDE, MAX_LATITUDE ...
With your GPS system connected to your PC, go outside until you get a GPS reading locked in and have your lat/long position. If you can’t go outside, try hanging the GPS unit out the window, maybe attach it to a stick or pole—this is where the sticky tape and string comes in...
Public Function GetDistance(ByVal dblLat1 As Double, ByVal dblLat2 As Double, ByVal dblLong1 As Double, ByVal dblLong2 As Double) As Double ' http://itouchmap.com/latlong.html ' http://mathforum.org/library/drmath/sets/select/dm_lat_long.html ' http://stevemorse.org/jcal/latlon...
MinLat: minLat, MaxLat: maxLat, MinLng: minLng, MaxLng: maxLng, }returngeohash.String(), b } 4. Geohash 的优缺点 Geohash 的优点很明显,它利用 Z 阶曲线进行编码。而 Z 阶曲线可以将二维或者多维空间里的所有点都转换成一维曲线。在数学上成为分形维。并且 Z 阶曲线还具有局部保序性。
def test_creates_lat_long_array(self): arr = xee.EarthEngineBackendArray('longitude', self.lnglat_store) self.assertEqual((1, 4008, 4010), arr.shape) def test_can_create_object(self): arr = xee.EarthEngineBackendArray('B4', self.store) self.assertIsNotNone(arr) self.assertEqual((64...
googleLatandLong=newgoogle.maps.LatLng(latitude,longitude);varmapOptions= {zoom: 5,center: googleLatandLong,mapTypeId: google.maps.MapTypeId.ROADMAP};varmapDiv=document.getElementById("map");map=newgoogle.maps.Map(mapDiv, mapOptions);vartitle="Server Location";addMarker(map, googleLatandLong...