geo

This question already has answers here : Google Maps API 3 fitBounds padding - ensure markers are not obscured by overlaid controls (7 answers) Closed 3 years ago . I have a full screen Google map with HTML/CSS toolbars overlaid on the map, and a set of map markers. Is there a way to ensure there is enough padding between the markers and the edges of the map, so that no markers are obscured by the toolbars? ( Codepen in case the code below doesn't work) function initMap() { var map = new google.maps.Map(document.getElementById('map'), { draggable: true, streetViewControl: false, zoomControl:

HTML5提供了地理位置定位功能（Geolocation API），能确定用户位置，我们可以借助HTML5的该特性开发基于地理位置信息的应用。本文结合实例给大家分享如何使用HTML5，借助百度、谷歌地图接口来获取用户准确的地理位置信息。 定位功能（Geolocation）是HTML5的新特性，因此只有在支持HTML5的现代浏览器上运行，特别是手持设备如iphone，地理定位更加精确。首先我们要检测用户设备浏览器是否支持地理定位，如果支持则获取地理信息。注意这个特性可能侵犯用户的隐私，除非用户同意，否则用户位置信息是不可用的，所以我们在访问该应用时会提示是否允许地理定位，我们当然选择允许即可。 function getLocation(){ if (navigator.geolocation){ navigator.geolocation.getCurrentPosition(showPosition,showError) }else{ alert("浏览器不支持地理定位。") } } 上面的代码可以知道，如果用户设备支持地理定位，则运行 getCurrentPosition() 方法。如果getCurrentPosition()运行成功，则向参数showPosition中规定的函数返回一个coordinates对象，getCurrentPosition()

I have recently started a small project that involves drawing transport scheme on top of the Leaflet map. I've got a collection (array) of points denoting stops, each having an attribute location (LatLng). How can I place them on the map without using native markers but using SVG layer with paths & circles instead and guaranteeing the correct geographical placement of elements on every dragging or zooming of the map? So far, I've thought of: Using the SVG overlay provided by Leaflet inside the overlay pane on the map. The problem with this approach is that I have a feeling it was designed

I am using D3.js and TopoJSON libraries to render a flat SVG map of the world in a small div on a web page. I'm also taking some geographic objects (polygons and circles), and plotting them on this map via lat/long coordinates. This all seems to be working pretty well, however, the circle objects that I am plotting on the map contain a radius element which is given in meters. I cannot find or figure out how to convert/scale this measurement appropriately onto the SVG map. Any help would be greatly appreciated. The snippet of code that is drawing the circle and setting is: if

I am trying to plot a polygone on python, using different libararies, but no one of these worked with me. I tried vincent , Shapely , .. and now matplotlib. I don't wanna use softwares like qgis I used this example: http://geographika.co.uk/visualising-geojson-in-15-minutes EDIT: Archive of original blog post: https://web.archive.org/web/20160310165846/http://geographika.co.uk/visualising-geojson-in-15-minutes from matplotlib import pyplot from descartes import PolygonPatch import math import urllib2 import simplejson data = [] with open('file.json') as f: for line in f: data.append(json.loads

​Geo类型 Redis3.2.0版本推出 可以将用户给定的地理位置信息存储起来，并对这些信息进行操作 GEOADD key longitude latitude member [longitude latitude member ...] //在使用排序集表示的地理空间索引中添加一个或多个地理空间项，时间复杂度O(log(N)) 127.0.0.1:6379> geoadd key1 121.3996887207031 31.04559326171875 member1 116.3883056640625 39.92889404296875 member2 (integer) 2 GEODIST key member1 member2 [unit] //返回地理空间索引的两个成员之间的距离，时间复杂度O(log(N)) 127.0.0.1:6379> geodist key1 member1 member2 "1086809.8477"//默认单位为m 127.0.0.1:6379> geodist key1 member1 member2 m "1086809.8477" 127.0.0.1:6379> geodist key1 member1 member2 km "1086.8098" 127.0.0.1:6379> geodist key1 member1 member2