***mysql中经度纬度字段用什么存储(关于mysql的float和decimal区别)
float,decimal精确度比较 float,double容易产生误差,对精确度要求比较高时,建议使用decimal来存,decimal在mysql内存是以字符串存储的,用于定义货币要求精确度高的数据。在数据迁移中,float(M,D)是非标准定义,最好不要这样使用。M为精度,D为标度。mysq...
如何找到给定纬度/长度以北x km的纬度/经度?
I have some C# code that generates google maps. This codes looks at all the Points I need to plot on the map and then works out the Bounds of a rectan...
增强现实,摄像机视图上的经度和纬度投影
I am supposed to develop an adroid app that displays a picture on the camera view, when you point the camera in the right direction, representing a po...
将地址转换为经度和纬度
I want to do the following - Allow users to input a physical address in ios app. - This address is converted to longitude/latitude - Django server cod...
R中的纬度和经度坐标
I have a column of combined latitude and longitude coordinates in the following format: 我有一列合并的纬度和经度坐标,格式如下: coordinates(-73.2566,44.51513) I am tryin...
如何从谷歌地图中的纬度和经度坐标获取城市名称?
How might I obtain the city name in Google Maps if I have latitude and longitude coordinates of a town or area? 如果我有一个城镇或地区的纬度和经度坐标,如何在谷歌地图中获得城市名称? I ...
如何在谷歌地图中从纬度和经度获取地址位置?
So I have latitude and longitude Like 44.4647452 and 7.3553838. I need to get address like: Milan, Italy, str. Kennedy 89. 所以我有纬度和经度,比如44.4647452和7.3...
来自纬度/经度的谷歌地图API中的错误管理区域(来自邻国)
We have received wrong results for the 'administrative_area_level_1' part of near-country-limits points, but strangely 'administrative_area_level_2' a...
Webservice,在iphone中从当前的纬度-经度提供附近位置的图片
is there any webserivce which gives the pictures of the nearby location of the current latitude and longitude.I want to implement this in iphone . I h...
在iPhone中从纬度和经度获取当前位置的天气
I have current location Latitude[17.382042000000000000] and Longitude[78.481727299999990000]. 我有当前位置纬度[17.382042000000000000]和经度[78.481727299999990000...
使用Javascript从Google Places搜索api获取纬度和经度
How do I get the longitude and latitude from the searched location with the google maps place search box api. 如何使用谷歌地图搜索框api从搜索到的位置获取经度和纬度。 Im using ...
设置纬度和经度字符串格式javascript
I need to change code below to use "onsubmit" instead of "onblur" where javascript will validate if my latitude/longitude format are correct. The form...
在地图上用校准点将经度和纬度转换成X Y。
If i have a jpeg map with size sizeX, sizeY 如果我有一个大小为sizeX的jpeg地图,sizeY。 and some calibration points on the map (X, Y, Lon, Lat) 以及地图上的一些校准点(X, Y, Lon...
找到最近的纬度/经度-复杂的sql或复杂的计算
I have latitude and longitude and I want to pull the record from the database, which has nearest latitude and longitude by the distance, if that dista...
用纬度经度计算两点之间的距离,我做错了什么?
Here's my try, it's just a snippet of my code: 这是我的尝试,它只是我的代码片段: final double RADIUS = 6371.01;double temp = Math.cos(Math.toRadians(latA)) ...
如何在android的离线地图arcgis中显示经度和纬度点?
in my app I have my own offline map (.tpk) but now I want to show some points on my map and I have some longitude and latitude , I am using this code ...
(纬度,经度)从半径创建边界框
The f I have one pair of latitude and longitude and a radius f我有一对纬度和经度以及一个半径 How can I create a box around this pair based on the radius? 如何根据半径在该对周...
数据库/SQL:如何存储经度/纬度数据?
Performance question ... 性能问题… I have a database of houses that have geolocation data (longitude & latitude). 我有一个拥有地理定位数据(经度和纬度)的房屋数据库。 What I wa...
正确索引Lucene中的纬度和经度值
Am working on a "US based nearest city search within a given radius" functionality using Lucene API. Am indexing city's lat and long values in Lucene ...
选择半径内的纬度和经度点
I'm using a forumla to select lat/long points in a database given a location and radius however I'm falling just short of it working. The only time I ...